Yamaha YP-X Series, Owner'S Manual

Page: 70 / 110

CHAPTER 5 Installation
5-12
4-4 Replacement of X 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) Loosen the M6 bolts securing the X-axis motor metal bracket, and remove
the belt from the pulley.
5) Loosen the bolt securing the driven pulley shown in Fig. 5-8.
6) Remove the M5 bolts securing the belt tensioner (L-shaped metal plate), and
loosen the long belt tension (put slack in the belt).
7) The long belt is fastened to the plate with two M5 bolts so loosen these bolts
and remove the belt.
8) After the long belt has been removed, remove the short belt.
9) Replace the old belts with new belts.
10) 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.
11) Adjust the belt tension and set the origin position again by absolute reset.
12) Make corrections if any point data has deviated.
X-axis motor
Metal bracket M6 bolt
Plate
shaft
M6 bolt
Driven pulley
Securing bolt
Belt tensioner M5 bolt Short belt Long belt
Fig. 5-8 Belt replacement