Gerber GS750 Plus User Manual page 77

6. Locate the jackshaft gear and the Y motor pinion. These two
gears are meshed together. Gently attempt to rotate the
jackshaft gear. With one finger on the motor pinion, notice if
the jackshaft gear moves while the pinion remains stationary.
If the pinion moves with the jackshaft gear (i.e., if there is no
backlash), no adjustment is necessary.
7. If the Y motor pinion remains stationary (i.e., if there is
backlash), loosen the two Phillips head screws which hold the
Y motor bracket against the side plate. (Only one screw is
visible.) .
8. Apply light pressure upward to tighten the mesh of the
jackshaft gear and the Y motor pinion.
CAUTION: Forcing the jackshaft gear and Y motor pinion
to mesh too tightly can cause the jackshaft gear to wear
prematurely.
If you adjust the mesh too loosely, poor letter quality will
result. However, it is safer to tighten the mesh gradually,
cut a test plot, then tighten again than to adjust the mesh
too tightly.
9. While holding the motor bracket in place, tighten the two
bracket screws.
10. Turn the plotter power on. REVERSE/SWAP function will be
in the NORMAL mode.
Plotter Adjustments 69