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Page 28 T46230811 Rev . J DH P ositioning System Assembly , Non P/T This Document Supports Assembly 46230811 Rev J CAUTI ON To avoid stripping the aluminum tapped holes, do not over tighten the screws securing the adapte…

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DH Positioning System Assembly, Non P/T T46230811 Rev. J

This Document Supports Assembly 46230811 Rev J

9. Using the locking bracket, rotate each guide wheel bushing adapter

and/or guide wheel with bushing in a clockwise direction, to release

pressure on the rotary disc.

10. Manually position the rotary disc so the FRONT label on the rotary

disc is located at the front of the machine.

11. Align the two .25 inch (6,4mm) locating holes in the rotary disc with

the two .25 inch (6,4mm) locating holes in the top of the X axis frame.

NOTE

The rotary disc is centered between the four guide wheels by applying

equal pressure from all four guide wheels. When adjusting the guide

wheels, adjust in diagonal pairs. Adjust one diagonal pair of guide

wheels, then adjust the other diagonal pair of guide wheels.

CAUTION

The bushing adapters should be tightened counterclockwise. Excessive

force in a clockwise direction could deform the rotary disk.

NOTE

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 disc.

12. Preload all the guide wheel bushing adapters in a counterclockwise

direction to just remove the vertical spacing between the rotary disc

and guide wheels. Check this by physically moving the rotary disc 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 diagonal pair of guide

wheels.

HIGH PROFILE

TORQUE

GAGE

TORQUE

ADAPTER

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T46230811 Rev. J DH Positioning System Assembly, Non P/T

This Document Supports Assembly 46230811 Rev J

CAUTION

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 disc.

NOTE

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 disc 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.

18. Remove the locator pins and rotate the rotary disc 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 disc 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 disc to securely engage the rotary disc

stop block into the lock assembly.

27. Check the locator pins to ensure they 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.

LOW PROFILE

WRENCH

TORQUE

ADAPTER

TORQUE

GAGE

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DH Positioning System Assembly, Non P/T T46230811 Rev. J

This Document Supports Assembly 46230811 Rev J

SOCKET

HEAD

CAP

SWITCH

Rotary Disk Lock

SOCKET

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 disc drive assembly stop plate and secure it in

place with the socket head cap screws. Ensure the rotary disc is

centered in the V-groove of the rotary disc drive assembly drive wheel.

32. Check the locator pins to ensure they 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 disc 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.

X and Y Axes Gear Belt Tension Adjustment

Procedure

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.

This procedure is applicable to gear belt replacement and gear belt stretch

resulting from machine operation.

NOTE

Reset gear belt tension after 150 hours of machine operation. New belts

stretch due to machine operation.

Gear Belt Tension Adjustment

1. Power down the machine and perform Lockout/Tagout according to

local procedures.

WARNING

The machine must be powered down and the local Lockout/Tagout

procedure performed to ensure personal safety during this procedure.