ABB IRB 920 Product Manual page 522

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Table of Contents

5.6.5 Replacing the ball screw

For Clean Room/ IP54 robots

Refitting the shaft for Clean Room/ IP54 robots

Continues on next page

Use a handheld dynamometer hooking to the strap

and pull the dynamometer to make the tension

falling in the allowed force range.

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.

For robots with protection type Clean Room:

Clean the joints that have been opened and wipe

the parts free from particles with spirit on a lint

Cut the paint or surface on the robot

before replacing parts on page 118

After all repair work, wipe the Clean Room robot

free from particles with spirit on a lint free cloth.

For robots with protection class IP54 (option 3350-

For robots with protection type Clean Room (op-

tion 3351-1)

Install the shaft to the ball screw at 40.2 mm pos-

ition to the lower of the ball screw.

Used belt: 36.6

xx2100001126

Used belt: 139

New belt:110

xx1900001617

Product manual - IRB 920

3HAC075721-001 Revision: C

Troubleshooting