ABB IRB 920, Product Manual

Page: 107 / 1008

Lubricating the ball screw spline unit
Note
For robots with protection type Clean Room
For robots with protection class IP54
First remove the upper bellow and lower bellow according to Replacing the
bellows on page 421 .
Then, use this procedure to inspect the ball screw spline unit.
Note
Cover the end effector and peripheral equipment in case the grease drips, before
lubricating the ball screw spline unit.
Note Action
Turn on the electric power supply to the robot.
If the robot is not connected to the controller, power
must be supplied to the connector R1.MP according
to the section
Supplying power to connector R1.MP
on page 64 .
1
DANGER
When releasing the holding brakes, the robot axes
may move very quickly and sometimes in unexpec-
ted ways!
Make sure the payload is disassembled or tooling
is properly supported; otherwise, fast downward
movements of axis 3 may cause severe hits.
2
Release the holding brake by pressing the button
on the internal brake release unit. 3
Move the outer arm to a position where the axis 3
can be moved in full stroke. 4
Move the shaft manually to its upper limit while
pressing the brake release button. 5
Wipe off old grease from the shaft. 6
Apply new grease and fill the grooves. Wipe off
excessive grease. 7
Move the shaft manually to its lower limit while
pressing the brake release button. 8
Wipe off old grease from the shaft. 9
Apply new grease and fill the grooves. Wipe off
excessive grease. 10
Move the shaft up and down several times while
pressing the brake release button to smooth out
the grease on the shaft. Wipe off excessive grease. 11
Product manual - IRB 920 107
3HAC075721-001 Revision: C
© Copyright 2022 ABB. All rights reserved.
4 Maintenance
4.6.1 Lubricating the ball screw spline unit
Continued