46230812.pdf - 第25页
Page 23 TECHNICAL PUBLICATIONS DH Positioning System Assembly , P/T T46230812 Rev . D This Document Supports Assembly 46230812 7. Move the frame as close as possible to the bearing support block then tighten the mounting…
Page 22
TECHNICAL PUBLICATIONS
T46230812 Rev. D DH Positioning System Assembly, P/T
This Document Supports Assembly 46230812
X and Y Axes Ball Screw Unit Adjustment
Purpose:
Alignment of the ball screw unit axes to the support bearings is critical to the
proper function of the positioning system. Improper alignment of the ball
screw nut to the corresponding axis frame may result in misalignment of the
ball screw end in relationship to the support bearings for that axis. The
following procedure is intended to minimize the misalignment and system
drag load and thereby maximize bearing life.
Comments:
Initially these adjustments are done at the factory and should not be required
in the field. If the ball screw unit must be replaced in the field, the alignment
procedure must be performed.
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. Thoroughly clean the frame counterbores and if necessary, clean the
threads of the ball screw unit with a tap.
3. Loosen the mounting bolts on the bearing support blocks.
4. Install the dust bellows and protective covers over each ball screw unit.
5. Slide a ball screw unit through the mating bore in the support frame
and support the ends of the ball screw unit in the respective bearings.
6. Start the threads of the nut on the ball screw unit into the frame. Screw
the threads in until just before the aligning journal on the ball screw
unit is engaged. The ball screw unit should be loose.
Page 23
TECHNICAL PUBLICATIONS
DH Positioning System Assembly, P/T T46230812 Rev. D
This Document Supports Assembly 46230812
7. Move the frame as close as possible to the bearing support block then
tighten the mounting screws in the bearing support block. This will
locate and align the bearing support block.
8. Move the frame as close as possible to the bearing in the motor mount.
This represents the maximum bind experienced by the ball screw unit.
9. Thread the nut of the ball screw unit fully into the counterbore. Note
the ease that is required to assemble the ball screw unit. If anything
other than finger generated force is required, disassemble the ball screw
unit and start the procedure over. Otherwise, tighten the nut in the ball
screw unit fully and secure the ball screw unit in the frame using the
no-mar set screw.
10. Move the frame over the full range of motion for the axis noting any
changes in drag on the ball screw unit. Frame movement should be
smooth for the entire range of motion.
11. Perform steps 2 through 9 for the ball screw unit on the other axis.
12. Install the drive pulleys and their protective covers for each axis then
perform the belt tension adjustment for each axis.
End of procedure
Page 24
TECHNICAL PUBLICATIONS
T46230812 Rev. D DH Positioning System Assembly, P/T
This Document Supports Assembly 46230812
Rotary Disk Alignment
Purpose:
The rotary disk alignment procedure aligns the rotary disk to the X axis
table.
Several associated assemblies rely on one another. If one assembly is
adjusted, the rest are affected. It may be necessary to alternate between one
step of the procedure and another several times until the rotary disk is
aligned.
Read the entire rotary disk alignment procedure before attempting the
adjustment.
Rotary disk alignment is correct when, with the rotary disk locked in the
FRONT position, the dowel pins can be inserted and removed by hand
through the rotary disk and into the X axis table.
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
properly aligned. If the pins can not be inserted into the holes with force,
the disk is not properly aligned.
After the rotary disk is aligned, the two locator pin assemblies drop into
their corresponding locator holes. The additional pressure exerted by
the lock assembly may cause the rotary disk to shift. This shift prevents
the insertion or extraction of the guide pins and additional adjustment of
the lock assembly is required.
If the locator pins slide into the holes after the lock and drive
assemblies are in position, alignment is correct. Proceed to the X-Y
axes encoder adjustments.
Machines with Board Handling System have two low profile guide
wheels which require a special wrench and procedures. These
differences are noted as applies in the following procedure.
Special Tools:
Torque Wrench (in./lbs.)
Torque Gage (in./oz.) (46808001)
(Waters Mfg. model 651C-30)
Torque Adapter (45081601) (High profile guide wheels)
Dowel pins (1/4 x 2) (80010109) with collars (18333000)
Wrench (46758401) (Low profile guide wheels)
Rotary Disk Assembly
STOP BLOCKS