4.2.5 The brake release buttons may be jammed after service workDescriptionThe 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 andrefitting of the brake release unit, the brake release buttons may be jammed afterrefitting.DANGERIf the power is turned on while a brake release button is jammed in depressedposition, the affected motor brake is released. This may cause serious personalinjuries and damage to the robot.EliminationTo eliminate the danger after service work has been performed inside the SMBrecess, follow the procedure below.NoteActionMake sure the power is turned off.1Refit the push button guard, if removed.2Verify that the push-buttons of the brake re-lease unit are working by pressing themdown, one by one.3Make sure none of the buttons are jammedby the push button guard.xx0600002777If a button gets jammed in the depressed po-sition, the alignment of the push button unitmust be adjusted so that the buttons canmove freely.Remove the push button guard and:• Make sure the centering piece (B) isproperly fitted to the unit. (The piecealigns the unit vertically.)• Adjust the unit sideways so that themeasurements x1 and x2 in the figureto the right do not differ more than 1mm from each other.4Article number for the centering pieceis specified in Required equipment onpage 252.Refit the push button guard and check thebuttons again by pressing them down, oneby one.5Product manual - IRB 1600/1660 1613HAC026660-001 Revision: W© Copyright 2006-2018 ABB. All rights reserved.4 Repair4.2.5 The brake release buttons may be jammed after service work
