YAMAHA-YG系列 换螺杆指导书.pdf - 第18页

Service Engineer Service I nformati on SI080 2008 E-000 = YG series: Replacement proc edure for ball screws of each axis 18/65 3. Loosen the two bolts at the slott ed part of the coupling on the ball screw side. Figure 2…

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Service Engineer
Service Information
SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
17/65
When removing the ball screws of YG88R, YG100R, YG200, YG200L and YG300 models.
1. Remove the bearing on the dead end side of the SCREW BALL Y AXIS.
1) Loosen the set screw for anti-backlash on a corner of the LOCK NUT by rotating it about 360
degrees with a hex wrench.
2) Loosen the LOCK NUT while inserting a hex wrench into a hole (for anti-rotation) on the SCREW
BALL Y AXIS.
3) Remove the LOCK NUT from the SCREW BALL Y AXIS and remove the whole bearing unit.
Figure 19
The following procedure is common to all the models.
2. Remove the four bolts (M4*14) that fix the SUPPORT UNIT.
Figure 20
Setscrew for anti-backlash
LOCK NUT
HOLDER, BRG. Y
*Please do not remove
this part.
SCREW BALL Y AXIS
FRAME R, Y AXIS
SUPPORT UNIT
Fixing bolt for the
SUPPORT UNIT
SCREW BALL Y AXIS
Motor for the Y-axis
Service Engineer
Service Information
SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
18/65
3. Loosen the two bolts at the slotted part of the coupling on the ball screw side.
Figure 21
4. Remove the bolts that fix the nut bearing located under the X-axis frame.
Figure 22
5. Slowly move the X-axis frame backwards by hand ino order to remove the ball screw.
Note:
The X-axis frame needs to be moved to the concave part of the Y-axis frame in order to remove the
ball screw.
Hex wrench (Size 3)
SCREW BALL Y AXIS
Coupling
X-axis frame
Fixing bolts (Qty:4)
Y-axis nut bearing
SCREW BALL Y
AXIS
Service Engineer
Service Information
SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
19/65
2.2.1. Sub-assembly
Note:
Please ship the ball screw as a Sub-Assy.
Assemble the parts taking the replaced Ball screw Assy. as a model.
Figure 23
Caution:
When you assemble the parts by yourself without using the sub-Assy., please make sure to check and
adjust the center position of the bearing.
1. Assemble the parts at the dead end side of the ball screw. (Bearing, seal, shim and housing)
2. Mount the SUPPORT UNIT assembled in procedure 1 on the ball screw on the motor side, and fix
it by tightening the LOCK NUT. Then tighten the set screw on a corner of the LOCK NUT and
make a mark with a marker pen.
3. Set the stopper to the ball screw.