Perform the following procedure to disassemble the head drive assembly.
Prerequisites:
Drawing of the Radial Insertion Head Assembly
Electrical Wires Disconnected
Insertion Head Tooling has been removed
Comments:
This procedure assumes that the head drive assembly is being disassembled
to replace the drive mechanism.
To rebuild this assembly, reference the reassembly procedure found in this
module.
If possible, it is more efficient to remove the motors and bearings from the
assembly with the casting secured to the machine.
Procedure:
1.Power down the machine and perform Lockout/Tagout according to
local procedures.
2.Use a clamp to secure the head drive assembly, and remove the 4
mounting bolts. Lift the head drive assembly from the machine.
3.To replace the drive mechanism, first loosen the socket head cap screw
and remove the threaded locking collar clamp from the top of the drive
mechanism shaft. This allows the separation of the bearing assembly
from the top of the drive mechanism.
4.Loosen the screw in the push rod clamp and unscrew the push rod. This
allows the bearing assembly to completely separate from the drive
mechanism.
5.Remove the push rod from the drive mechanism.
6.Remove the ball bushing from the top of the drive mechanism.
7.Loosen the four mounting bolts on the brushless DC motor and push
the motor toward the head assembly, removing the tension from the
timing belt. Remove the belt.
8.Remove the bumper, then remove the theta pulley from the top of the
drive mechanism.
9.Remove the stop ring from the top of the drive mechanism.
10.Loosen the four bolts securing the vertical drive motor and tighten the
1/4 – 20 SHCS jacking screw.
11.Remove the timing belt from the vertical drive pulley on the vertical
drive motor and the bottom of the drive mechanism.
12.Turn the 1/4 – 20 SHCS jacking screw counter clockwise. This releases
the pressure on the compression spring.
13.Remove the vertical pulley from the bottom of the drive mechanism.
14.Remove the grease seal block.
15.Remove the 4 bolts from the bottom of the drive mechanism.
16.Carefully separate the ends of the drive mechanism and remove the
drive mechanism from the casting.
17.Reference the assembly procedures to reassemble this assembly.
End of procedure.