Yamaha YP-X Series, Owner'S Manual

Page: 69 / 110

CHAPTER 5 Installation
5-11
4-3 Replacement of Z axis belt (YP220BX, YP220BXR)
1) Turn off the controller power.
2) Remove the side cover on the robot unit.4)
3) Place marks(with a marker etc.) on the pulleys before replacement to limit
deviations in point data occurring due to the belt replacement. (Fig. 5-4)
4) Remove the M6 bolts securing the Z-axis motor metal bracket, and remove
the belt from the pulley.
5) Remove the M6 bolts shown in Fig. 5-8, and remove the plate securing each
shaft.
6) Replace the old belts with new belts.
7) Place the new belt on the pulley lining it up with the marks (for synchroniz-
ing the positions of the two pulleys) you made in step 3) above.
8) Adjust the belt tension and set the origin position again by absolute reset.
9) Make corrections if any point data has deviated.
M6 bolt
Metal bracket
Z-axis motor
Fig. 5-7 Belt replacement