Brooks PreciseFlex 100 - Page 95

Brooks Automation 6. Service Procedures
Part Number: 603988 Rev. A
Replacing the X-axis Timing
Belt
Step Action
2.
Remove the rear cover from the X-axis.
3.
Remove both tape seal brackets from the X carriage.
4.
Remove the Tension Screw from the right end cap and remove the right end cap by removing the (4)
M4 X 35 mm SHCS.
5.
Remove the (4) M4 X 16 mm SHCS that clamp the tension yoke to release the belt tension and free the
yoke.
6.
Remove the stop block by removing the (2) M4 X 20 mm SHCS.
7.
Unplug the robot cables going from the E-chain through the hole in the X extrusion to the robot
controller.
8.
Cut the tie wraps holding the harness to the E-chain end bracket.
9.
Remove the (2) M3 X 6 mm FHCS attaching the E-chain end bracket to the X extrusion.
10.
Loosen all the M4 SHCS screws that attach the linear rail about two turns.
11.
Slide the linear rail about 150 mm out the right end of the X extrusion.
It is a good idea to put a tie wrap through the last M4 clamping hole in the linear rail so that the carriage
cannot slide off the rail, which can cause the bearing block balls to fall out of the bearing block.
12.
Unhook the X belt from the X motor pulley and slide the X carriage out past the end of the X extrusion
on the linear rail.
Be careful not to slide it off the rail, per above.
It is now possible to access the X-axis belt clamp.
13.
Remove the (4) M3 X 12 mm SHCS and lock washers retain the belt clamp.
14.
Thread the new belt through the tension yoke and pulley and clamp with the belt clamp.
Make sure that the belt is centered under the belt clamp.
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