The Brake Release Buttons May Be Jammed After Service Work - ABB IRB 1660 Product Manual

4.2.5 The brake release buttons may be jammed after service work

Description
The brake release unit has push-buttons for the brake release of each axis motor.
When service work is performed inside the SMB recess that includes removal and
refitting of the brake release unit, the brake release buttons may be jammed after
refitting.
Elimination
To eliminate the danger after service work has been performed inside the SMB
recess, follow the procedure below.
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Product manual - IRB 1600/1660
3HAC026660-001 Revision: W
4.2.5 The brake release buttons may be jammed after service work
DANGER
If the power is turned on while a brake release button is jammed in depressed
position, the affected motor brake is released. This may cause serious personal
injuries and damage to the robot.
Action
Make sure the power is turned off.
Refit the push button guard, if removed.
Verify that the push-buttons of the brake re-
lease unit are working by pressing them
down, one by one.
Make sure none of the buttons are jammed
by the push button guard.
If a button gets jammed in the depressed po-
sition, the alignment of the push button unit
must be adjusted so that the buttons can
move freely.
Remove the push button guard and:
• Make sure the centering piece (B) is
properly fitted to the unit. (The piece
aligns the unit vertically.)
• Adjust the unit sideways so that the
measurements x1 and x2 in the figure
to the right do not differ more than 1
mm from each other.
Refit the push button guard and check the
buttons again by pressing them down, one
by one.
© Copyright 2006-2018 ABB. All rights reserved.
Note
xx0600002777
Article number for the centering piece
is specified in Required equipment on
page 252.
4 Repair
161