8: MACHINE MAINTENANCE
3. Loosen the two mounting bolts holding the belt
tensioner. Adjust the tensioner until the belt is tight
enough to only deflect 0.125" (3 mm) when pressed with
one finger.
4. Tighten the tensioner mounting hardware and repeat for
the other side of the gantry.
5. Loosen the mounting hardware for the servo motor.
6. Slide the servo back in its mounting slots until the belt is
taught. It should deflect about 1/16" (1.5 mm) when
pressed with one finger.
7. Tighten all mounting hardware and re-install belt covers.
8.4 ADJUST RACK AND PINION PRELOAD
Tools and Items Required
l
Allen Key Set
l
Crescent Wrench
The rack and pinion gear drive on the 1300PL uses a spring
preload to allow the pinion gear to self adjust to compensate
wear on the rack and reduce backlash. It is preset at the
factory and will not need frequent adjustment.
8.4.1 Y-Axis
1. Remove the motor belt cover over the servo motor
pulley.
2. Remove the belt covers from both sides of the gantry.
3. Adjust the preload nut on the pinion mount assembly
until the spring is compressed approximately 1/4" (6
mm) from its fully slack position.
4. Reinstall all belt covers and guards.
©Tormach® 2020
Specifications subject to change without notice.
Page 61
UM10720: 1300PL Operator's Manual (Version 0820B)
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