PCB-baked-machine-1

Deep analysis of PCB board baking method and storage method,help you become an SMT process expert

PCB-baked-machine-1

 

After the PCB is manufactured, it has a shelf life. If the shelf life is exceeded, the PCB needs to be baked. Otherwise, it is easy to cause the PCB to explode when the PCB is produced on the SMT.
Baking can eliminate the internal stress of the PCB, which is to stabilize the size of the PCB. The baked board has a relatively large improvement in warpage.
Advantages of baking: After baking, the moisture in the pad can be dried, the welding effect is enhanced, and the welding and repair rate are reduced.
Disadvantages of baking: The color of the PCB board may change, affecting the appearance.
The main purpose of PCB baking is to remove moisture and remove moisture from the PCB.

First, the specification of PCB management

1, PCB unpacking and storage

(1) PCB board seal can be directly used online within 2 months of unopened manufacturing date
(2) PCB board manufacturing date is within 2 months, the date of unpacking must be marked after unpacking
(3) PCB board manufacturing date is within 2 months, after opening, it must be used within 5 days.

2, PCB baking

(1) If the PCB is sealed and unsealed for more than 5 days within 2 months of the date of manufacture, please bake at 120 ± 5 °C for 1 hour.
(2) If the PCB is more than 2 months from the date of manufacture, please bake at 120 ± 5 °C for 1 hour before going online.
(3) If the PCB is more than 2 to 6 months from the date of manufacture, please bake at 120 ± 5 °C for 2 hours before going online.
(4) If the PCB is more than 6 months to 1 year before the date of manufacture, please bake at 120 ± 5 °C for 4 hours before going online.
(5) The baked PCB must be used within 5 days (input to IR REFLOW). After the bit is used, it needs to be baked for another hour before it can be used.
(6) If the PCB exceeds the manufacturing date of 1 year, please bake at 120 ± 5 °C for 4 hours before going online, and then send it to the PCB factory for re-spraying before it can be used.

 

PCB-baked-machine-1

3, PCB baking method

(1) Large PCB (16 PORT and above including 16 PORT), placed in a flat format, with a maximum of 30 sheets in a stack, and the oven is opened within 10 minutes after baking. The PCB is placed in a flat and natural cooling (requires pressure to prevent the bay fixture)
(2) Small and medium-sized PCB (8PORT below 8PORT) is placed flat, the maximum number of stacks is 40 pieces, the number of uprights is not limited, the oven is opened within 10 minutes after baking, and the PCB is placed flat and naturally cooled (requires pressure protection) Banwan fixtures)

PCB-baked-machine-1
PCB-baked-machine-1

Second, the preservation and baking of PCBs in different regions

The specific storage time and baking temperature of the PCB are not only related to the production capacity and manufacturing process of the PCB manufacturer, but also have a great relationship with the region.

The PCB made by the OSP process and the pure immersion gold process generally has a shelf life of 6 months after packaging, and is generally not recommended for the OSP process.

The storage and baking time of PCB has a great relationship with the area. The humidity in the south is generally heavier. Especially in Guangdong and Guangxi, there will be “returning to the south” weather every year in March and April. It is very wet at this time. The PCB must be used up within 24 hours of exposure to air, otherwise it will be easily oxidized. After normal opening, it is best to use up to 8 hours. For some PCBs that need to be baked, the baking time is longer. In the northern regions, the weather is generally dry, the PCB storage time will be longer, and the baking time can be shorter. The baking temperature is generally 120 ± 5 ° C baking, baking time is determined according to the specific circumstances.

If you need to know more about PCB drying and PCB-baked-machine machin, please contact us.

Email:ming@smthelp.com  Phone /skypy:+8618126316729

Southern Machinery (SMTHELP), which specializes in SMT machines and spare parts. SMTHELP has more than 20 years of experience in the electronics processing equipment industry. Customers all over the world, and win the trust and praise of customers. Long-term customers include BOSCH in Spain and India, DIXION in India, Panasonic in Mexico, Samsung and Cliptechin Brazil.

With the SMTHELP industry experience, philosophy and professional team, adhere to the “One-Stop Solution” belief to serve customers in the electronics processing industry, providing customers with cost-effective, high quality spare parts and equipment with stable performance from China, saving customers time And cost. truly one-stop solution services.

 

An Analysis of SMT Solder Paste Printing Defects

An Analysis of SMT Solder Paste Printing Defects

In SMT PCB production, solder paste printing is a critical step. Since the solder paste is used to directly form the soldering joint, the quality of solder paste printing affects the performance and reliability of the surface mount assembly. Quality solder paste printing guarantees a quality solder joint and final product. Statistics demonstrate that 60% to 90% of soldering defects are related to solder paste printing defects. So it is very important to understand what causes defects in solder paste printing.
ItemFactorsAnalysis1Solder PastePowder formationThe irregular shape of solder powder will easily clog stencil apertures. This will cause a big slump after printing. It can also cause solder ball and short bridge defects after reflow.

A spherical shape is best, especially for fine-pitch QFP printing.Particle SizeIf the particle size is too small, the results will be poor paste adhesion. It will have a high oxygen content and cause a solder ball after reflow.

The particle size should be controlled to about 25 ~ 45 μm in order to meet the requirements for fine-pitch QFP soldering, If the partical size desired is 25 to 30 μm, it should applied with less than 20 μm solder paste for an ultra fine-pitch IC.FluxFlux contains a thixotropic agent, which allows the solder paste to have pseudoplastic flow characteristics. Since the viscosity decreases when the paste passes through the stencil apertures, the paste can be applied to the PCB pads rapidly. When the external force stops, the viscosity will recover to ensure no deformation occurs.

The flux in the solder paste should be controlled to between 8 and 15 percent. A lower flux content will result in excess amount of solder paste applied. Conversely, a high flux content will result in an insufficient amount of solder applied.2StencilThicknessA stencil that is too thick will cause a solder bridge short.

A stencil that is too thin will cause an insufficient solder to be applied.Aperture sizeWhen the stencil aperature size is too big, a solder bridge short can occur.

When the stencil aperature size is too small, and insufficient solder paste will be applied.Aperture shapeIt is best to use a circular-shaped stencil aperture design. Its size should be slightly smaller than the PCB pad size, preventing a bridging defect during reflow.3Printing parametersBlade Angle Speed & PressureThe blade angle affects the vertical force applied on the solder paste. If the angle is too small, the solder paste will not be squeezed into the stencil apertures. The best blade angle should be set around 45 to 60 degrees.

A higher the printing speed means that less time will be spent in applying the solder paste through the stencil aperture surface. A higher printing speed will cause insufficient solder to be applied.

The speed should be controlled to around 20 ~ 40 mm/s.

When the blade pressure is too small, it will prevent the solder paste from being cleanly applied to the stencil.

When the blade pressure is too high, it will result in more paste leakage. The blade pressure is typically set at about 5N ~ 15N / 25mm.4Printing process controlPCB moistureIf the PCB moisture is too high, the water under the solder paste will quickly evaporate, causing the solder to splash and creating solder balls.

Dry the PCB if it was fabricated over 6 months ago. The recommended drying temperature is 125 degrees for 4 hours.Paste storageIf the solder paste is applied without a temperature recovery period, the water vapour in the surrounding environment will condense and penetrate the solder paste; this will cause the solder to splash.

Solder paste should be stored in a refrigerator at 0 to 5 degrees.Two to fours hours before use, place the paste in a normal temperature environment.

 

 

SMT Solder Paste printer Squeegee improving solution

 

principle of PANASONIC-MV2V(C-F-B) component recognition (1)

An article to let you know the principle of PANASONIC-MV2V(C/F/B) component recognition

An article to let you know the principle of PANASONIC-MV2V(C/F/B) component recognition.

Edited by ming Gan, please contact ming@smthelp.com for more information.

principle of PANASONIC-MV2V(C-F-B) component recognition (1)
principle of PANASONIC-MV2V(C-F-B) component recognition (1)
principle of PANASONIC-MV2V(C-F-B) component recognition (2)
principle of PANASONIC-MV2V(C-F-B) component recognition (2)
principle of PANASONIC-MV2V(C-F-B) component recognition (3)
principle of PANASONIC-MV2V(C-F-B) component recognition (3)
principle of PANASONIC-MV2V(C-F-B) component recognition (4)
principle of PANASONIC-MV2V(C-F-B) component recognition (4)
principle of PANASONIC-MV2V(C-F-B) component recognition (5)
principle of PANASONIC-MV2V(C-F-B) component recognition (5)

1 program composition
1) NC PROGRAM: Z-axis components are placed at X, Y positions at θ angle
2) PCB PROGRAM: substrate length, width, thickness and PIN spacing
3) ARRAY PROGRAM: Z specified components
4) PART LIBRARY: Component Information
5) MARK LIBRARY: tag information
2 NC PROGRAM
1) File name: P [0-9, A-Z, +, -,.] 2) X, Y coordinates
3) Z No: ZA+ZB, K TYPE and Q TYPE, in single and double FEEDER at 8mm width
The difference between K TYPE and Q TYPE: * PIN, no PIN
* PITCH: K-21.5mm Q-20mm
* ORG: FULL is 1, K-Z1, Q-Z2 when HALF
FEEDER: HALF must be used when mixing single and double
Z No: Single input K TYPE: Product number, Q TYPE: Even
4) θ angle: θ1, θ2 two, θ3 origin return
Θ1:0° 90° 180° 270°
Θ2: [set angle – θ1] + correction angle Reverse time is –
5) S&R: STEP REPEAT, PATTERN REPEAT
On time is +
6) NO MOUNTING: 0-normal patch, 1-non-patch
7) SKIP BLOCK: 0 – unconditional execution, 1 to 9 – conditional jump, 7 – unconditional jump
8) MARK: 0 – no MARK, 1 – individual MARK, 2-PCB MARK, 3-PATTERN MARK
9) LAND TEACHING: 0-NO, 1-LAND TEACHING [Recommended for the second leg of each side] 10) BAD MARK: 0-NO, 1-BAD MARK [SENSOR] 2-BAD MARK [PCB CAMERA] 11) PROGRAM OFFSET: X=, Y=, move the first point of the patch to the camera center
The machine automatically finds PROGRAM OFFSET
12) Z ORG is normally 1 and Z No can be set
* NC PROGRAM sequence
S&R->BAD MARK->MARK/PROGRAM->ROGRAM OFFSET->MARK
3 ARRAY PROGRAM
1) File name: P [0-9, A-Z, +, -,.] 2) Z No: Fixed cannot be changed
3) SHAPE CODE: shape coding [machine] 4) PARTS NAME: component name [person] 5) VACUUM OFFSET: NOZZLE↑ +, NOZZLE↓ – [-3~3mm] 6) MASTER Z No.: master, slave Z axis
4 PCB PROGRAM
1) File name: P [0-9, A-Z, +, -,.] 2) X: PCB length
3) Y: PCB width
4) T: PCB thickness [NO USED] 5) Whether the PIN is used: 0-not used, 1-automatic adjustment
6) Hole spacing: X-10
7) Conveyor speed: 1[H]~8[L] speed, X, Y table speed when fully automatic control
5 MARK LIBRARY
1) SHAPE CODE: shape coding,
X, Y: MARK size
PCB material: 0-copper foil, 1-solder
PATTERN: shape
TYPE: 0-shade, 1-binarization
6 PARTS LIBRARY
1) Shape coding: SHAPE CODE [, 0-9, A-Z, +, -,.] 2) Component type CLASS: 1 to 99 [1 to 19 transmission recognition, 20 to 99 reflection recognition] Reflection recognition: blue light is absorbed on the orange reflector, and the surface of the component is reflected [Figure A] By recognizing: the white light of the halogen lamp shines on the orange reflector, and the reflector reflects the light.
Depending on the component, the edge of the component is reflected to the camera [Figure B] * High reflection recognition accuracy, high passability through recognition, LED off when used
* For identification θ: CHIP angular deviation > 35° NG, QFP angular deviation > 25° NG
TYPE: For component color, normal condition is 1 [black best] 3) SHUTTER [Shutter]: 0-on, 1-in [Generally open] Closed left and right to ensure component identification [Figure D] 4) Component dimensions SIZE: up, down, left, right
Hand-drawn tape to see the reverse side of the component is the same as the camera [Figure C] 5) Component thickness THICKNESS: T-component body thickness
6) Thickness tolerance TOL: T<1 is 20% T≥1 is 15%
7) HEAD SPEED: 1[H]~8[L] X, Y TABLE SPEED: 1[H]~8[L] 8) NOZZLE SELECT: 1~5
9) CAMERA: 0-S, 1-L
10) Component feed direction FEED DIRECTION: 0 to 7, 45° interval
11) Packing method: 0-PAPER [including 32mmPEELING] 1-EMBOSS 2-BULK
12) PUSHPIN: 0-NO USE 1-USE only for 8mm bandwidth
13) Number of feeds FEED COUNT: 1~4 spacing 12mm
14) Auxiliary feed: NO USE
15) Component error correction RECOVERY: 0-NO, 1-YES, 2- large parts are sucking
16) CHIP STAND: 0-NO, 1-YES
[Components stand up, thickness sensor is detected, LINE SENSOR application] 17) VACUUM OFFSET: absorbing, for components [-3mm~+3mm] 18) LEAD OUT SIZE: Up/Down Left/Right
19) LEAD PITCH: leg spacing
20) LEAD PITCH TOL: tube leg tolerance
21) LEAD COUNT: Up/Down Left/Right Legs
22) Electrode part ELECTROD: The length direction of the element is the length direction of the electrode [Fig. E] The width direction of the component is the width direction of the electrode
23) CUT LEAD: cut tube legs SIDE: 1~4, there are cut legs on the side
COUNT: Cut off: POSTION: Position [Figure F]

1,Please visit : www.smthelp.com

2, Find us more: https://www.facebook.com/autoinsertion

3, Know more our team: https://www.linkedin.com/in/specialist/

4, Welcome to our factory in Shenzhen China

5, See more video in Youtube: Auto+Insertion

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solder paste printing

Depth analysis: What are the factors that affect the thickness of SMT press solder paste printing?

Depth analysis: What are the factors that affect the thickness of SMT press solder paste printing?
In the solder paste printing machine, sometimes the printed solder paste is very thin, which causes the product to fall off due to too little solder paste after the furnace is finished. So how is this phenomenon caused? Below I will analyze some specific reasons for everyone.

First, the quality of the steel plate — stencil printing is contact printing, so the stencil thickness and opening size determine the amount of solder paste printing, too much solder paste will produce bridging, too little solder paste will occur solder deficiency or solder joint, template The shape of the opening and the smoothness of the opening also affect the quality of the release. The template opening must have the bell mouth down, otherwise the solder paste will be taken from the chamfered corner of the bell when the mold is released. DEK accessories

solder paste printing
solder paste printing
solder paste printing
solder paste printing

Second, the printing process parameters — solder paste is a thixotropic fluid, with viscosity, when the scraper moves forward at a certain speed and angle, push the solder paste to roll in front of the scraper, the need to inject solder paste into the mesh or leak hole The pressure, the viscous friction of the solder paste causes the solder paste to shear at the intersection of the squeegee and the stencil, and the shear force reduces the viscosity of the solder paste, which facilitates the smooth injection of the solder paste into the mesh. There is a certain constraint between the speed of the blade, the pressure of the blade, the angle of the blade and the stencil, and the viscosity of the solder paste. Therefore, only by properly controlling these parameters can the printing quality of the solder paste be ensured.

sp-1008-automatic-screen-printer-for-smt-pcb-assembly

Semi-Auto Screen Printer SP-1200 for 1.2M LED assembly.

Semi-Auto Screen Printer SP-1200 for 1.2M LED assembly.
Semi-Auto Screen Printer SP-1200 for 1.2M LED assembly.

 

 

Third, contact printing blade pressure:

1 blade pressure 10~20 depends on the size of the press or template installation;

2 The blade pressure should be sufficient to scrape the template;

3 The blade pressure is too high, which may result in:

  1. Speed ​​up the wear of the template;

2, printing causes solder paste pattern adhesion;

  1. The solder paste is hollow;
  2. The solder paste is pressed out from the reverse side of the template to cause the solder ball.

Fourth, the contact printing blade speed:

1 fine pitch (12-20mil0.5-1.5 inches / sec (13-38mm /

2 custom pitch (20-50mil1.5-4.5 inches / sec (38-115mm /

3 solder paste viscosity will have a certain impact on the speed of the scraper

4 reduce the speed of the blade will increase the thickness of the solder paste printing

5 template thickness increases, scraper speed should be reduced accordingly

6 printing too fast is easy to cause insufficient solder paste

 

1,Please visit : www.smthelp.com

2, Find us more: https://www.facebook.com/autoinsertion

3, Know more our team: https://www.linkedin.com/in/specialist/

4, Welcome to our factory in Shenzhen China

5, See more video in Youtube: Auto+Insertion

4, Looking for more informations: ming@smthelp.com

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How to design SMT factory layout for Smart EMS

 

 

How SMT workshop planning? It turned out to be so useful.

How SMT workshop planning!

And only after the plant began production found that some areas have not planned beforehand, need to be adjusted, resulting in a waste of human and financial resources and valuable production time.

Therefore, it is important to check in advance SMT factory layout, especially for new SMT factory business, because there is no experience in SMT plant layout, the need to pay attention to the elements is not very clear, if we find a problem in the layout after production point, will cause some unnecessary losses.

So, when doing layout SMT plant, what to pay attention to what matters in advance to do to prepare? Here actual cases where we work to and we explore this problem.

Case

planning SMT line configure

the client recent planning new on two identical SMT production line, specific device configuration (see FIG. 1) and the size of the apparatus is as follows: According to Figure 1 can be seen, the maximum width of the production line equipment is 1.71 m, the length of all devices sum is 13.6 meters, will add future planning a production line (line bulk on equipment configuration).

Situation Workshop

Workshop length 36 m, width of 12 m, an area of 432 m2, on the ground floor of the factory. Currently common ground for the shop floor, and no established anti-static system, can not meet the requirements of SMT antistatic workshop, but two conductive ground terminals, can establish subsequent workshops antistatic SMT system. Further, there is no air conditioning workshop and humidifiers, can not meet the requirements of SMT workshop temperature and humidity control. There workshop ventilation system, back to meet the requirements of the reflow furnace equipment. Workshop sufficient power to meet the electricity needs of all equipment in the workshop. There are two entrances whole plant, as are required to meet the equipment, raw materials and semi-finished channel. Special materials warehouse in another workshop, the need for planning. Good lighting conditions in the workshop, to meet the brightness of the SMT shop lighting requirements all stations. Whole plant layout situation shown in Figure 2.

Customer requirements

1, the current new move into production lines and related aids, regional positioning;

2, the whole plant to meet future erection and production requirements three production lines, without planning zone realignment;

3, each production line starting position as consistent as possible, so that the whole plant orderly arranged in three lines.

Subject  of

analysisthe customer’s request, we first analyzed how the production line positioning; and before locating the production line, we consider the following points:

1, SMT equipment should avoid column and they maintain a certain distance, the distance is equipment installed at least after a good feed material by a vehicle;

2, SMT crossing equipment required for frame division pitch, and the crossing equipment to extend outwardly after the device installed above the material 50 cm;

3, optimal spacing of the two lines spaced more than 1.2 meters between the outer frame;

4, check the wire tail is generally a repair plan area, quality control personnel can perform sampling line tail region.

Based on the above considerations, the length of each line should be at least 13.6 meters (without regard to the maintenance area and the tail, the case where the sampling area and the thread area kanban), the width should be 2.7 meters (SMT feeding both surfaces), specifically as shown in Figure 3.

Therefore, the production line is positioned in substantially considering plant shown in FIG. 4.

Some details of the requirements of SMT plant layout

after determining the approximate location of the production line, when the need to consider some details of SMT production line requirements, and then to determine the exact location and the location of other auxiliary equipment SMT line.

First, we analyzed the SMT line position and aids required for each area requirements: 1, fire extinguisher drop zone;

fire extinguishers to be placed around the side of the post and SMT plant, placed according to the requirements of fire regulations.

2, the car rack placement region; car rack replacement for SMT production line models and switching material, in order to facilitate production and to improve the efficiency of replacement materials, preferably the vehicle is placed near the rack placement machine.

3, stock units rest area;

stock table mainly used in the production process and dryer materials stock preparation before switching, therefore, to be placed near the preparation station placement machine, and the best car rack together, Preparation facilitates directly on the car frame after a good feed material.

4, the shelf rest area printing station;

printing station for positioning the shelf aids in the production of printing presses, such as wipes, paste, alcohol, etc., to be placed in the vicinity of the printing press to facilitate removal use, improve Productivity.

5, placing solder paste regions;

region comprising placing solder paste storage refrigerator, solder paste mixer, paste warmed cabinets, can be placed next to the plant as required or uprights placed around a fixed area of the plant, However, to facilitate the operator to take place.

6, visual inspection after the furnace area, maintenance area;

in order to facilitate visual inspection after reflow and rework semifinished product, a shelf generally placed in the furnace, designed for the visual inspection of the furnace and rework.

7, screen placement area;

drop zone comprises a mesh screen plate was placed cabinet, stencil cleaning machine, inspection tools, screen, stencil for storing, cleaning and inspection screen tension, etc., while in the region as much as possible to facilitate the production screen to take place.

8, garbage drop zone;

Production waste mainly from two parts, wipes and the like used in one printing operation, the second is to replace the waste tray and waste material produced with the like. Garbage two parts is generated to be placed separately, specialized recycling, in particular waste presses used. Thus, waste area may be placed next to the press machine or patch, or set beside the column region refuse placed separately placed.

9, kanban placement region;

kanban including the SMT billboards and other signage quality management, may be centrally located on the entrance into the shop, and also set up the production line Kanban state in which each head of the line, in order to view the producers and managers, promptly understand the current state of production status and quality SMT workshop and so on.

10, product placement area;

include products produced finished products in two parts, to separate the two partial regions divided out, strictly distinguished, in order to avoid confusion.

11, SMT placement of spare areas;

Nozzle including the SMT spare parts, a motor, a belt, cylinder or the like, to be placed in a special area, to facilitate the production of access.

12, location area temperature and humidity;

temperature and humidity conditions in order to better understand the SMT plant, depending on the size of the workshop area, several appropriately set the temperature and humidity measurement area, generally placed on the production line next to the column or wall.

13, SMT workshop office area;

let engineers and technicians and management personnel in office SMT shop floor, which can solve the problem on technology and management encountered in the production, to ensure the smooth operation of the SMT production lines.

14, anti-static protection area;

entry into SMT workshop area must have good anti-static measures. You may delineate the area in front of the plant, including the replacement of static clothing, shoes, hats and so on each employee’s locker. Also, the establishment of regional designed to test the static ring in SMT workshop at the entrance, so that each employee to do static loop testing and record test results before going to work. Based on the above analysis, the results of this SMT plant layout is shown in Figure 5.

In addition, SMT workshop also meet other requirements: 1, anti-static processing;

shop floor must be anti-static treatment, a common anti-static conductive flooring and paint and other ordinary places, customers can choose according to the actual situation. In addition, anti-static system must be set up in the workshop, to meet the requirements of the entire anti-static SMT workshop.

2, air-conditioning and a humidifier; SMT workshop to meet the requirements of temperature and humidity control.

3, the material management requirements;

in the warehouse, with particular attention to the way the material is stored, reel packaging methods, the use of hook-type place, wetting elements employed Cabinets for placement shelves to be treated with anti-static manner.

4, patch equipment gas and electrical circuitry;

preferably introduced directly from the production line at the down side of the roof, is arranged below the gas passage in the device and circuit wrapped with wire groove.

5, the ventilation system requirements;

needs to be installed to meet the requirements of the three power lines of the blower, and the third exhaust port reserved line.

Results

1, according to the size of production line and the size of the entire plant SMT, completed the reasonable position of the production line; and

2, for aids, regions, etc. SMT production lines need to make the corresponding position location; 3, according to the SMT the characteristics of the plant, some of the necessary factors to consider in planning, in particular, anti-static; 4, in accordance with the requirements of the current situation and future development of the factory has been take into consideration, unified planning.

Summary

For SMT plant layout, but also requires a combination of size and product requirements and other plants to consider a number of factors, but to stimulate here.

 

Welcome inquiry

 

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3, Know more our team: https://cn.linkedin.com/in/smtsupplier

 

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https://docs.google.com/document/d/e/2PACX-1vSFUaow2vtLCQbtVShngWxA2uiLkcv6i4BKn4ORhsatobh8Ah_ONk2bFfjkAOSsZf3yKfBrj2hULMi0/pub

How to prevent static electricity in the process of SMT placement machine?

How to prevent static electricity in the process of SMT placement machine?

Southern Machinery Anti Static Tools & Supplies
Southern Machinery Anti Static Tools & Supplies

In the SMT production line, we will encounter the problem of static electricity, from the friction between the clothes and the dry air to the dry air, which is the end of the duckweed. If the condition is suitable, it is a few volts and the peak is hundreds of kilovolts, so anti static is the need to do in our work, today, the south. Give some measures to introduce mechanical anti electrostatic patch SMT.

static clothing, antistatic shoes (conductive shoes)
static clothing, antistatic shoes (conductive hats)

Http://www.smthelp.com

Static electricity has three: static clothing, antistatic shoes (conductive shoes), electrostatic hand rings, antistatic shoes and electrostatic hand rings to guide the human body to avoid accumulation in the human body.
Ordinary clothes will have great electrostatic voltage in the walk (>1000V). And antistatic clothing does not happen when it moves. This is the main role of antistatic clothing, long strip antistatic clothing can not shield the inside of the clothing produced static (after wearing still >1000V), grid – like antistatic clothing can be shielded (<200V), the static electricity generated through the floor and the grounding line of various parts of the plant to the outside of the general grounding wire.

Http://www.smthelp.com

一,The purpose of preventing static electricity

1, strengthen the consciousness of the workers on the anti static operation

2, reduce the poor production caused by static electricity

3, prevent static electricity from causing damage to the product

二,Scope of application: all SMT production lines

三,The reasons

The generation of static electricity is not perceived, but the static electricity produces the voltage of tens of thousands of volts. When the static electricity comes into the tip (the static release point, such as the human finger), it releases all the energy in a moment, causing the contact material to be struck by electric shock, causing the capacitance, IC, line road and so on to be destroyed and burned, so that the product is strict. In the case of heavy damage, static electricity measures should be taken. .

四,The contents of the operation

Anti Static Tools & Supplies SMT magazine rack&turnover rack
Anti Static Tools & Supplies
SMT magazine rack&turnover rack

(一)Prevention and treatment of human static electricity

1, the workers should wear electrostatic clothing, work shoes;

2, the operator should take electrostatic gloves when working.

3, the operator should take an electrostatic ring in the operation.

(二)Prevention and control of static electricity

  1. Make use of electrostatic materials to produce production tools.

2, the storage place to prevent static electricity;

(三)Prevention and control of static electricity of a worktable / mobile vehicle

1, the anti static film should be pasted on the work table.

2, the operation platform / mobile vehicle must have antistatic grounding chain.Prevention of equipment static electricity: good grounding wire

(四)Prevention and control of material static electricity

  1. When the material is taken, the operator should use the antistatic method: with electrostatic gloves and electrostatic rings.

2, the material storage should be anti static measures: material cabinet to paste electrostatic film, grounding chain.

3, there should be anti-static measures in temporary storage area: installing grounding chain.

(五)Prevention and control of static electricity related to production: anti static measures should be taken when using items related to production: static wires and antistatic films.

 

五, Note:

  1. The online operators should strictly abide by this rule
  2. The online operators are supervised by the team leader, and the engineers are supervised by the engineers.

 

SMT,THT,PCB,PCBA,IM,AI,LED,Axial Inserter, Radial Inserter,Odd form Insertion,PIN insertion, Eyelet Insertion, Terminal Insertion,Insertion Mount,Chip Mounter, Pick and Place, IC Mounter, High Speed Mounter,PCB board handling system, Loader, Unloader, Conveyor,Shuttle,LED lighting, LED Lamp, LED Display, LED tube,UPS, Power Converter, Power Adepter, Mobile Charger,Induction Cooker, AC, Electric Cooker, Fan, TV, Settle Box,PCB Assembly,

PCB board handling system Destacker Build Procedure

Destacker Build Procedure    SDM0029
Rev
A

 

 

1.    Obtain the proper shop packet and check order for build information. Pull all parts if any parts are missing,         fill out a shortage sheet and give a copy to the appropriate material coordinator.

 

2.    Pull the latest Electrical and Mechanical prints.

 

3.    The following procedure is for a 29″ Destacker. Attach leg and control box to main beam. Leg should be flush to         left side of main beam. Control box should be 3″ from right side of main beam. Attach width units to main beam,         4-3/8″ from either end square to main beam and Parallel to each other.

 

4.    The following procedure is for the 44″ and 58″ Destackers Attach leg and control box to main beam. Leg 7-5/8″ from     left end control box 7-5/8″ from right end. Attach width units to main beam 8.975″ from either end. Square to main         beam and parallel to each other.

 

5.    Attach rear rail to width supports parallel to main beam 3/8″ overhand from either end of main beam.

 

6.    Level conveyor from side to side and front to back, off rear rail

 

7.    Attach front rail to width supports. Match level to rear rail, especially front to back. Make parallel to rear rail. Make         ends even with rear rail.

8.    Install motors, pulleys, UHMW and belts on rails.

 

9.    Attach Destacker assy to rails

 

10.    Assemble valve pack assy and install

 

11.    Attach air input assy

 

12.    Attach front cover and wire into control box

 

13.    Run pneumatic lines, load program software and test.

 

14.    Complete check sheet, turn over to QC

 

 

End of Document

 

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45798401 Tube Continuity to save Auto Insertion machine running cost

 

 

45798407 Tube Continuity

45798406 Tube Continuity

45798405 Tube Continuity

45798404 Tube Continuity

45798403 Tube Continuity

45798402 Tube Continuity

45798401 Tube Continuity

 

 

Preventive Maintenance Schedule

 

WARNING Do not perform any preventive maintenance with power on unless specifically instructed otherwise. Failure to observe this warning may result in personal injury.

 

CAUTION When performing machine maintenance, wear a wrist strap connected to ground to prevent electrostatic discharge damage to printed circuit boards.

 

500,000 Cycles Check: Perform Maintenance:

  1. Clean the clinch scrap tube with the pipe cleaner (40940101) twice daily (every 250,000 cycles).

 

3,000,000 Cycles Check: Perform Maintenance:

  1. Check for excessive wear on the pins 1. Lubricate the cutter linkage pins with Magnalube and linkage. Replace if necessary. (40833809).

 

12,000,000 Cycles Check: Perform Maintenance:

Check for worn cutters and bushings on 1. Replace if necessary. the cut and clinch by observing the quality of the production board component leads. 2. Lubricate the clinch lead screw with Super Blue (BLKM07680). 3. Replace the O-rings and bumpers in the cutter cylinders on the cut and clinch assembly. 4. Lubricate the three surfaces of the notch in the rocker guide Kendall Super Blue (BLKM07680).

48,000,000 Cycles Check: Perform Maintenance: 1. Lubricate the anvil slides with Kendall Super Blue (40833838) and grease gun (47408201).

 

 

 

S -1688 Stencil Cleaner Machine USER MANUAL for PCB Assembly

Meet the Needs of the SMT Age

 

 

Please read this user manual carefully before running

 

 

 

 

 

 

 

 

S-1688 Stencil Cleaner Machine

 

 

 

USER MANUAL

 

 

 

 

 

 

 

 

 

 

 

 

TEL : 0755-83203237

FAX : 0755-23240492

ADD : Room 1806, Block 3, Jinyun COFCO, Qianjin 2nd Road ,Baoan District,
Shenzhen City, China

 

 

CONTENTS

 

1.0 safety warning……………………………………………………………………………….3

 

2.0 product presentation
…………………………………………………………………3

 

3.0 installation requirements……………………………………………………………….4

 

4.0 Operations Guide……………………………………………..…….………………………………..5

 

5.0 The cleaning of the solvent is added, platoon and storage tank………………………………………………………..………….…………………………………………..13

 

6.0 Replacement of filter element………………………………………………………15

 

7.0 Product use precautions……………………………….…………..……………….…………………………………..16

 

8.0 working principle………………………………………….………………………………………..16

 

9.0 Maintenance, fault handling ……………………….………………………………………16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.0 safety warning

1.1 Please read this manual carefully.

 

1.2 Please strictly follow the installation requirements in this instruction and the guide to operation. The installation and use of this equipment.

 

1.3 Please equip a person to operate the equipment

 

1.4 The operator must wear protective glasses, protective gloves, protective respirators and other protective products.

 

2.0 product presentation

 

2.1 Name: full pneumatic steel net cleaning machine

 

2.2 model: S-1688

 

2.3 Product features

 

1)
Use full pneumatic logic control, one-click operation, easy to finish cleaning and drying

 

2) No power supply, no fire hazard.

 

3) The cleaning frequency system is automatically counted to facilitate the replacement of consumables in time to ensure the quality of cleaning work.

 

4) The cleaning pressure can be adjusted according to the need to ensure the stability of steel mesh tension, thus ensuring the longer service life of the steel net.

 

5) The whole operation process is completely closed, avoiding the direct contact between the workers and the cleaning fluid

 

6) Various types of cleaning fluid can be used for efficient cleaning

 

7)
Can effectively remove solder paste, such as red glue residue and more from steel mesh, wire mesh, copper mesh, microporous network, scraper, fixture, PCB, etc.

 

8) The three – level filtration device ensures the recycling of cleaning fluid, and realizes the minimal loss of cleaning fluid.

 

9)
Asymmetric rotating spray arm: ensure the cleaning of fine PCB holes.

 

10)
Digital free setting cleaning and drying time

 

 

2.5. Main technical parameters:

 

Applicationstencil, glue screen , copper screen
Stencil sizeStandard 29 inch and below
Clean liquid capacityMax 50L , Min 20 L
Cleaning fluid volume40L
Cleaning method Rotary double-sided pressure injection and
high-pressure air spraying ( cleaning and drying )
Clean time2~4 min (stencil and copper net)
Rinse time2~4 min (stencil and copper net )
Dry time2~5 min
External air supply0.4Mpa~0.6Mpa
Air consumption400~600L/Min*2
Air outlet size?125*25mm
Weight 320Kg
Dimension 980mm(L)*700mm(W)*1730mm(H)
Tin filter methodThree class filter (10?m,5?m,1?m)

 

3.0 installation requirements…

 

3. 1. Installation site

 

In order to ensure safe production and prevent possible damage to the equipment, the equipment should be installed in a place that meets the following environmental conditions

 

1) Stay away from sources and heat sources

 

2?The air is dry and well ventilated

 

3) Clean, clean, flat and unshaken ground

 

3. 2. Installation accessories, required energy and precautions

 

1) The source pressure is : 0.4Mpa~0.6Mpa

 

2)Taken the air over diameter for ?: 12mm, a quick joint is needed

 

3) The top of the equipment is designed ?: The 125mm exhaust port shall be connected to the outside by independent air duct

 

 

4) matters need attention: In order to ensure safe production, customers must ensure that the following security measures are installed in place. Otherwise, the company does not assume any responsibility for security

?It is at least 3 meters away from the electric equipment, away from fire source and heat source

 

?The ground wire must be connected, and the earth shall not be connected to any other electrified equipment

 

?The exhaust duct of this equipment shall not be connected to any equipment that can produce heat source. (such as reflow soldering wave soldering of SMT, etc.)

 

3.3 installation space

 

To facilitate the maintenance and replacement of spare parts for equipment operation, please leave more than one meter space around the equipment

 

4.0 Operations Guide

 

A Preparation before operation

 

4.1.1 connect the air source to the machine, the gas source is connected well, the display lamp is highlighted and the subsequent work can be continued

 

4.1.2 check if air pressure in the standard rating (04-0.6 MPa) range. Lower than 0.4mpa will affect the cleaning effect and reduce production efficiency (too low will not activate the machine).

Higher than 0.6mpa can result in damage to the mechanical gas system and all parts of the system.

Adjust the pressure method: pull upward gently to adjust the knob and rotate to the right————- Increase pressure

Go to the right ————– reduce stress

After reaching the required pressure, press the adjusting knob, air pressure lock and pressure to complete the gas connection, and the lamp is highlighted





 

 

4.1.3 check whether the top exhaust duct is unblocked or unblocked, which will result in damage to the environment and other consequences of the cleaning effect


 

 

 

 

4.1.4 check the glass viewport of the door panel through the liquid road to check the solvent reserves. The normal state is above the M position, and the machine can meet the various cleaning effects. The amount of liquid stored in this model is the maximum amount (40L).


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.1.5 if the solvent is not enough, please add adding method in time: see adding solvent method

 

4.1.6 the pump access panel is opened with a randomly attached triangle key to check whether the ball valves are in normal condition

Ball (the ball valve of pump outlet filter) A ball valve D (pump inlet connection of the reservoir fluid Xiang ball valve) opens, B ((the ball) of white PE tube pump discharge ball valve C (white PE tube pump inlet ball valve) closed


 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.2 time setting

 

4.2.1The setting of the cleaning time (see figure below), gently rotate the timer protection cap to the left and pull up the cover.

 

General cleaning time is

Minutes, depending on the actual situation, will be different.

This timer is measured in seconds (S) with a range of 10-999 seconds (S).

It can be set to 0, otherwise the machine will not start and may damage the timer and other components.

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.2.2 setting of drying time

Operation method and cleaning time setting.

The general drying time is 4-6 minutes depending on the actual situation.There will be an elongation of the aqueous solvents.

 

4.2.3The cleaning and drying time are automatic reset.

That is, one set, multiple times (N times).

When the pressure is less than the required number, the timer can be reset and the device cannot be started.

At this point, the black reset button on the upper row of the timer can be reset manually.

 

 

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.2.4The counter’s use of this counter is the increment counter, each cleaning a steel net, automatically into the system,

One of them is going up.

The count range is 0-999999.

Mainly used for cleaning work statistics, timely replacement of consumables (filter element), etc.

The filter cartridge should be changed when cleaning up to 1500.

Specific visual cleaning products are different and different.

When the counter displays the number to reach the target number, press the 4.2.3 method to open the cover, then press the black reset button on the left of the timer and the counter is reset.

 

4.3 placement of steel mesh

4.3.1 press the inner door safety button to open the cleaning room


 

 

 

 

 

 

 

4.3.2 lift the steel net with http://topmednorx.com both hands, gently place the front in the cleaning room chute roller and push it gently forward to the sliding channel steel

Fixed fixture on the net.

The steel net is in the middle of the fixture and chute. The top of the steel net is at the top of the cleaning room

Steel mesh fixture middle.(see below.)


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.3.3 when placing the steel mesh, the steel mesh shall not be in contact with the door to avoid damaging the steel net and sealant


 

 

 

 

 

 

 

 

 

 

 

 

 

4.3.4After the steel net is placed, close the cleaning door.

The inner door should be kept in good condition, otherwise, the solvent will be expelled outside, causing machine damage or environmental damage, more likely to cause personal injury



 

 

 

 

 

 

 

 

 

 

 

 

4.3.5 after the inside door is closed, continue to close the outer security door.

The security door is closed and the light is on, so that the following operation can be continued.

If the security door is not closed, the lamp will be retracted and the machine will not be able to start.

After closing the door again, the machine can be started

 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4.4 the start of the machine

 

4.4.1 press the start button lightly and the machine will start to run.

The machine will be automatically restored until the cleaning is completed


 

 

 

 

 

 

 

 

4.4.2 use the emergency stop button to press the emergency stop button when the emergency situation is in place. The machine will stop running.

The emergency situation is eliminated and the machine is restarted



 

 

 

 

 

 

 

4.5 adjustment of cleaning pressure

After the machine starts, pay attention to the pump input air source pressure and output cleaning pressure.

In order to achieve the best cleaning effect and maintain the tension of the steel mesh, the pressure should be adjusted


 

 

 

 

 

 

 

4.5.1 pump input air source pressure is generally maintained at about 0.4mpa

 

4.5.2 cleaning pressure is generally maintained at about 0.2-0.3MPa


 

 

 

 

 

 

 

 

 

4.5.3 adjustment of pump pressure: gently pull the adjusting knob of the pressure-reducing valve and turn the pressure on the right to increase the pressure to the left.

After adjusting well, press the adjusting knob to lock and adjust the work.

Note: this valve is the pressure reducing valve, the pressure adjustment will not be higher than the air source


 

 

 

 

 

 

 

 

4.6 the setting time is terminated and the machine is automatically stopped.

A cleaning cycle is over

 

5. Add, drain, and container for the solvent

 

5.1 addition of solvent

5.1.1 let the machine stop and open the access panel.

5.1.2 close ball valve B, D, open ball valve A, C.

Insert the “IN” pipe IN the ball valve C into the container containing the solvent.

Control the “IN” tube and start the machine until the machine drains the solvent.

 


 

 

 

 

 

 

 

 

 

 

 

 

 

5.2 discharge solvent and storage tank cleaning

5.2.1 open the liquid access panel and start the machine according to the normal procedure.

Close the ball valve D, open the ball valve C, and leave the machine idle for 1 minute.

In order to take out the solvent in the filter.

5.2.2 Open 8 screws on the tank and remove the reservoir cover..

 

5.2.3 press the stop switch to stop the machine.

Close the ball valve A and C, insert the “OUT” pipe of ball valve B into the container and slowly open the ball valve D.

Take care to control the “OUT” pipe at this time so as not to cause an accident.

 

5.2.4 when the solvent location of the reservoir is lower than the outlet filter of the reservoir, close the ball valve C and open the ball valve D.

Insert the white PE tube into the storage tank to remove the remaining solution

 

5.2.5When the solvent is removed, loosen the filter to fix the wire, remove the filter bag, remove the filter of the outlet and clean it with water or other means.

When the storage tank is cleaned and reloaded, cover the tank and lock the container

 

 

5.2.6 the liquid storage tank shall be cleaned and the solvent shall be drained and the machine shall be turned off.

Use a shovel knife to clean up the thick residues, leaving the small residue with a cloth strip

 

5.3 precautions for solvents

 

5.3.1 please wear protective equipment, such as protective gloves, protective glasses, protective masks, etc. to avoid direct contact with the human body and affect health and other safety accidents.

When operating, please pay special attention to the “IN” and “OUT” piping that controls the activity so as not to cause unnecessary security

 

6. Replacement of filter element

Replace the filter cartridge when cleaning a certain amount of steel net, the filter element needs to be replaced to satisfy the cleaning effect.

The replacement method is as follows

 

6.1. Remove the bottom of the filter with the left hand of the filter and remove the wrench into the disassembly hole, rotate the wrench to the left, remove the filter, then remove the filter element


 


 

 

 

 

 

 

 

 

 

 

6.2 installation of filter element

Wipe the filter clean and put in the new filter. (note that you can install a 5-micron filter on the outside by installing a 1-micron filter.

Then the left hand holds the bottom of the filter, and the right hand moves the filter nut.

When the hands are wrung, remove the wrench and hold it until it is unscrewed.

Pay attention to the filter cartridge when operating, the position of the filter should be put in place, for the positive

 

6.3 Replacement of seal rings

The sealing ring of the filter shall be soaked in the solvent for a long time because the chemical function will become larger. When the filter is removed, it will be difficult to install again.

The sealing ring should be removed at this time, with the spare ring installed.

Close the sealing ring after getting bigger, and substitute elastic back for backup

 

7. Use precautions

7.1. The installation site of the equipment is strictly prohibited near the source of fire, heat source and power supply.

The ground wire and exhaust duct must be installed and installed completely independently. It shall not be connected or connected with any other equipment

 

7.2. Replace the solvent, add, discharge the solvent, change the filter core, and when the steel net is taken, please wear protective equipment.To ensure the operator’s health and safety accidents.

 

7.3. Require strict access, adjustment and use of air source pressure according to the rated standard.Operate the machine according to the operating instructions and procedures of the machine.

 

7.4. It is not possible to bring cloth, paper scraps or other sundries into the machine cleaning room, or leave it in the storage tank, or it may cause blockage of the pipe and damage to the machine.

 

7.5. When operating the machine, please pay attention to the moderate intensity to avoid damage to the machine components.

 

7.6. No solvent cleaning machine surface or other non-stainless steel components shall be used to ensure the service life of the machine

 

8. Working principle

 

S-1688 Stencil Cleaner Machine

9.0 maintenance and fault handling

 

9.1 maintenance

 


 

 

 

 

 

 

 

 

 

 

 

9.2 fault handling

 


 

 

 

 

 

 

 

 

 

 

 


DIP, PCB Assembly,Chip Mounter, Pick and Place, IC Mounter, High Speed Mounter, Wave soldering,LED lighting, LED Lamp, LED Display, LED tube,UPS, Power Converter, Power Adepter, Mobile Charger, PCB board handling system, Loader, Unloader, Conveyor,Shuttle, Chip Mounter, Pick and Place, IC Mounter, High Speed Mounter Induction Cooker, AC, Electric Cooker, Fan, TV, Settle Box

Reflow oven process principle and introduction

The reflow oven process principle and introduction

As we know,reflow oven is the most important welding technology in surface mount technology. It has been widely used in many industries including mobile phones, computers, automotive electronics, control circuits, communications, LED lighting and many other industries. More and more electronic devices are converted from through hole to surface mount, and reflow oven  replaces wave  soldering is a obvious  trend in welding industry.

So what is the role of reflow oven equipment in the increasingly mature lead-free SMT process? Let’s take a look at the whole SMT surface mount line:

The whole SMT surface mounting line consists of three parts, such as steel mesh solder paste printing machine, SMT machine and reflow oven furnace. For the machine, and compared with lead free, and no new demands on the equipment itself; for screen printing machine, and a lead-free solder paste in the physical properties there are some differences, so put forward some improvement on the device itself, but there is no qualitative change. the key of lead-free  is  in the reflow oven.

The lead paste (Sn63Pb37) melting point of 183 degrees, if you want to form a good weld must have the thickness of 0.5-3.5um intermetallic compounds in welding, intermetallic compound formation temperature is above the melting point of 10-15, the lead welding is 195-200. The maximum withstand temperature of the electronic device on the circuit board is generally 240 degrees. Therefore, for lead welding, the ideal welding process window is 195-240 degrees.

Because of the change of melting point of lead-free solder paste, lead-free welding has brought great changes for welding process. At present, the lead-free solder paste is Sn96Ag0.5Cu3.5 and the melting point is 217-221 degrees. Good lead-free solder must also be formed 0.5-3.5um thickness intermetallic compounds, intermetallic compound formation temperature is also above the melting point of 10-15 degrees, for lead-free welding, that is, 230-235 degrees. Since the highest temperature of lead-free solder electronic device will not change, therefore, for lead-free soldering, ideal welding process window is 230-245 degrees.
The substantial reduction of process window brings great challenge to ensure welding quality, and also brings higher requirements to stability and reliability of lead-free wave soldering equipment. Because the equipment itself is coupled with the electronic device transverse temperature difference, due to differences in size of heat capacity will produce temperature difference in the heating process, so in the process control of lead-free reflow oven can be adjusted in the process of welding temperature window becomes very small, this is the real lead-free reflow to the difficulty.

 

DIP, PCB Assembly,Chip Mounter, Pick and Place, IC Mounter, High Speed Mounter, Wave soldering,LED lighting, LED Lamp, LED Display, LED tube,UPS, Power Converter, Power Adepter, Mobile Charger, PCB board handling system, Loader, Unloader, Conveyor,Shuttle, Chip Mounter, Pick and Place, IC Mounter, High Speed Mounter Induction Cooker, AC, Electric Cooker, Fan, TV, Settle Box

3D to show how SMT machine works

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