YAMAHA-YG系列 换螺杆指导书.pdf - 第29页
Service Engineer Service I nformati on SI080 2008 E-000 = YG series: Replacement proc edure for ball screws of each axis 29/65 [YG100R & Y G88R] Figure 37 Note: YG88R and Y G100R m achines have two ball screws. As th…
Service Engineer
Service Information
SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
28/65
3. Remove the two bolts that fix the joint located at the upper part of the ball screw, then lift up the
stay to separate it from the ball screw.
Figure 35
Caution:
Please do not loosen the bolts that fix the shaft of the ball bush to the stay.
Please be careful not to lose the damper attached to the BALL BUSH & SHAFT as it may remain on
the ball bush, or come with the shaft or fall into the machine.
4. Loosen the four bolts that fix the motor bracket with a hex wrench in order to remove the belt.
Note:
A brake is built into the PU-axis motor. When the motor and the ball screw are separated, the ball
screw goes down while rotating and comes off from the axis unit due to its own weight.
Please make sure to fasten a cable tie around the ball screw at just above the pulley in order to
prevent the ball screw from dropping before loosening the motor bracket.
[YG100 & YG88]
Figure 36
Ball screw
Fixing bolt
Joint
Stay
Joint
Shafts of the ball bush
Ball screw
Motor bracket of the PU axis
Fixing bolt
Belt
Service Engineer
Service Information
SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
29/65
[YG100R & YG88R]
Figure 37
Note:
YG88R and YG100R machines have two ball screws. As the ball screws are driven via inter midiate
shaft, two types of belts are used. One is for driving the ball screws and the other is for interlocking the
movement of the ball screws.
5. Remove the four bolts that fix the bearing housing to the base with a hex wrench, and remove the
axis unit and the connector of the origin sensor.
Figure 38
PU-axis ball screw
Interlock belt
for PU-axis
Drive belt for
PU-axis
Motor bracket
Belt tensioner
Ball screw
ORG sensor of the PU-axis
Bolts for fixing the bearing
housing to the base (Qty:4)
Service Engineer
Service Information
SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
30/65
6. Remove the four bolts that fix the flange on the axis unit that includes the ball screw removed in
the procedure 5 with a hex wrench, then remove the flange and the pulley from the unit.
Figure 39
7. Remove the bolts attached to the housing nut which is at the bottom of the ball screw in order to
remove the ball screw from the unit.
Figure 40
Bolts (Qty:4)
Ball screw
Pulley
Flange
Ball screw
Pulley
Nut housing
Fixing bolt
Ball screw