ABB IRB 920 Product Manual page 476

5 Repair
5.6.4 Replacing the pulley on the ball screw lower position
Continued
5
6
7
Fastening the transmission module screws and tension axis-4-2 timing belt
1
2
3
Continues on next page
476
Action
Use a handheld dynamometer hooking to the strap
and pull the dynamometer to make the tension
falling in the allowed force range.
Note
During the measurement, make sure that all inter-
ferences that may affect the force are removed.
Pay attention to the force application direction.
Use a sonic tension meter to measure the timing
belt tension.
If the timing belt tension does not meet the require-
ment, loosen the motor screws and readjust.
Action
DANGER
Make sure that all supplies for electrical power,
hydraulic pressure, and air pressure are turned
off.
CAUTION
For robots with protection type Clean Room
Always cut the paint with a knife and grind the
paint edge when disassembling parts of the robot!
See Cut the paint or surface on the robot before
replacing parts on page 118.
DANGER
Make sure that the ball screw is supported with
something.
The sudden drop of the ball screw due the lost of
the axis-3 motor may cause danger.
© Copyright 2022 ABB. All rights reserved.
Note
Used belt: 36.6
New belt:40
xx2100001126
Used belt: 139
New belt:110
Note
Product manual - IRB 920
3HAC075721-001 Revision: C