46230812.pdf - 第30页
Page 28 TECHNICAL PUBLICATIONS T46230812 Rev . D DH Positioning System Assembly , P/T This Document Supports Assembly 46230812 LOW PROFILE WRENCH TORQUE ADAPTER TORQUE GAGE SOCKET HEAD CAP SCREW SOCKET HEAD CAP SCREW ( L…
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TECHNICAL PUBLICATIONS
DH Positioning System Assembly, P/T T46230812 Rev. D
This Document Supports Assembly 46230812
The bushing adapters should be tightened counterclockwise. Excessive
force in a clockwise direction could cause the rotary disk to deform.
Work with the bushing adapters in pairs. Continuously check the two
locator pin assemblies after each bushing adapter pair adjustment. If
the locator pin assemblies start to resist removal, the bushing adapter
has been adjusted too tight against the rotary disk.
12. Preload all the guide wheel bushing adapters in a counterclockwise
direction to just remove the vertical spacing between the rotary disk
and guide wheels. Check this by physically moving the rotary disk up
and down.
13. Start with the guide wheel mounted on the front left side of the X axis
frame assembly. Align the guide wheel with the rotary disc then adjust
the bushing adapter in a counterclockwise direction. Using the inch/oz.
torque gage and torque adapter (high profile) or inch/oz. torque gage,
torque adapter and wrench (low profile), tighten the bushing adapter to
14 inch ounces (98,86Nm).
14. While holding the torque gage at 14 inch ounces, tighten the button
head screw to approximately 40 - 45 inch pounds to secure the
adjustment of the bushing adapter.
15. Repeat the adjustment procedure in steps 13 and 14 for the guide wheel
mounted on the rear right side of the X axis frame assembly.
16. Perform steps 13 and 14 for the remaining pair of guide wheels.
To avoid stripping the aluminum tapped holes, do not over tighten the
screws securing the adapter bushings.
17. Check the locator pin assemblies. If the locator pins do not slide into
and out of the locator holes, the bushing adapter has been adjusted too
tightly against the rotary disk.
Due to the tolerance build up, interference may be felt when inserting
and removing the pins. This is normal and in no way means the table is
not square. If the pins can not be inserted into the holes, the disk is not
square. Some resistance may be encountered when fitting the pins into
the holes, but the resistance should never require the assistance of a
tool to remove the pins from the X axis frame.
HIGH PROFILE
TORQUE
GAGE
TORQUE
ADAPTER
Page 28
TECHNICAL PUBLICATIONS
T46230812 Rev. D DH Positioning System Assembly, P/T
This Document Supports Assembly 46230812
LOW PROFILE
WRENCH
TORQUE
ADAPTER
TORQUE
GAGE
SOCKET HEAD
CAP SCREW
SOCKET HEAD
CAP SCREW
(LOCATED UNDER
THE
BRACKET)
SWITCH
BRACKET
Rotary Disk Lock Assembly
SOCKET HEAD
CAP SCREWS
18. Remove the locator pins and rotate the rotary disk one full revolution
to settle in the guide wheels.
19. Reinsert the locator pins into the locator holes and check that the
locator pins slide into and out of the holes. If they do not, repeat steps
9 through 18 until the locator pins fit properly.
20. Install the four stop blocks on the rotary disk assembly.
21. Remove the screws that secure the switch bracket on the lock assembly
and remove the switch bracket.
22. Loosen the socket head cap screws shown that secure the lock
assembly to allow adjustment of the lock assembly.
23. Insert the locator pins into the locator holes.
24. Manually move the lock assembly until the locator pins slide with even
force into the alignment holes.
25. In a diagonal pattern, tighten the socket head cap screws which secure
the lock assembly, 1/8 of one revolution per screw until the screws are
fully tightened.
26. With the locator pins removed, disengage the stop block from the lock
assembly then turn the rotary disk to securely engage the rotary disk
stop block into the lock assembly.
27. Check that the locator pins slide into and out of the locator holes.
28. If the locator pins do not slide into and out of the locator holes, repeat
steps 22 through 27 until they fit properly.
29. Replace the switch and bracket on the lock assembly and secure it in
position with the socket head cap screws.
30. Adjust the switch on the lock assembly so the switch actuator is
depressed.
31. Reposition the rotary disk drive assembly stop plate and secure it in
place with the socket head cap screws. Ensure the rotary disk is
centered in the V-groove of the rotary disk drive assembly drive wheel.
32. Check that the locator pins slide into and out of the locator holes.
33. Remove the locator pins from the rotary table locator holes.
34. Ensure the locking brackets do not extend over the rotary disk then
tighten the button head cap screws securing each locking bracket in
position.
35. Replace any covers and/or assembly components that were removed to
allow access to the guide wheel assemblies.
End of procedure.
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TECHNICAL PUBLICATIONS
DH Positioning System Assembly, P/T T46230812 Rev. D
This Document Supports Assembly 46230812
X and Y Axes Gear Belt Tension Adjustment
Procedure
Purpose:
X - Y Axes gear belts transfer motion from the motor assembly to the ball
screw unit which in turn moves the X or Y axis table positioning the printed
circuit board for component insertion. Due to the high degree of accuracy
required for component insertion and the speed between insertions, gear belts
must be kept at optimum tension. If the gear belt tension is too loose, table
over travel and therefore component misinsertion results. If the gear belt
tension is to tight, excessive gear belt and bearing wear results.
Comments:
This procedure is applicable to gear belt replacement and during gear belt
wear, resulting in gear belt stretch.
Because new belts stretch after approximately 150 hours of machine
operation, the gear belt tension must be reset after the initial 150 hours
of machine operation.
Gear Belt Tension Adjustment
Procedure:
1. Power down the machine. Execute your site's Lockout/Tagout
procedure.
The machine must be powered down and your site's Lockout/Tagout
procedure executed during this procedure to ensure personal safety.
2. Ensure the belt is correctly seated into both pulleys by rotating the
pulleys several rotations. This can be accomplished by moving the
appropriate axis by hand.
3. Loosen the three motor mounting bracket screws and allow the spring
mechanism in the encoder mounting plate to apply a force against the
side of the motor. The force is applied away from the lead screw
pulley and along the line between the centers of the pulleys.
4. With the force applied, again ensure the belt is correctly seated into
both pulleys by rotating the pulleys several rotations. This can be
accomplished by moving the appropriate axis by hand.
5. While the spring mechanism maintains the required force against the
side of the motor, tighten the three motor mounting bracket screws.
End of procedure.