Brooks Automation 6. Service Procedures
Part Number: 603988 Rev. A Tensioning the X-axis Belt
Tensioning the X-axis Belt
Electrical Shock
Working with energized equipment may cause electrical shock and may result in serious
injury or death. Removing the front cover allows access to the AC power terminals.
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Disconnect the AC power before tensioning the timing belts or replacing any
motors.
Tools Required
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2.0 mm hex driver or hex L wrench
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3.0 mm hex driver or hex L wrench
To adjust tension in the X-axis Belt, perform the following procedure:
Step Action
1.
Turn off robot power and remove the AC power cord.
2.
Loosen the tape seal of the robot by removing the (4) M3 socket head screws that attach the tape
seal brackets to the vertical Z riser plate.
Once the screws are removed, pull the tape seal ends and the tape seal out of the X-axis extrusion
grooves so that the X carriage can slide back and forth without dragging the tape seals.
3.
Remove the right end cap by removing the (1) M3 X 10 mm FHCS from the rear cover and the (4) M4
X 35 mm SHCS from the end cap.
4.
Loosen the (3) M4 screws that clamp the right end pulley yoke to the X extrusion.
5.
Move the X carriage to a position so that there is 500 mm from the carriage to the right end pulley
yoke where the belt is tangent to the yoke, to set the belt span to 500 mm.
6.
Measure the belt tension with the Gates belt tension meter using the settings in "Appendix E:Belt
Tensions, Gates Tension Meter" on page 123. Measure the belt tension by holding the microphone
close to the belt in the middle of the 500 mm span and gently plucking the belt.
7.
Adjust the belt tension by turning the belt tensioning set screws in the pulley yoke.
8.
Run the X carriage back and forth a few times to check the belt tracking.
Adjust the set screws if necessary to make sure that the yoke is parallel to the X-axis and that the
belt is tracking in the pulley and not pressing against the pulley flange.
Copyright © 2023 Brooks Automation, Inc.
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