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Adjusting Backlash
Leadscrew backlash is the amount of motion the
leadscrew rotates before the device begins to
move. Leadscrews always have a certain amount
of backlash that will increase with wear. Generally,
0.005"–0.010" of backlash is acceptable.
The backlash of the longitudinal and cross
leadscrew can be adjusted by changing the gap
in the leadscrew nuts (see Figures 50–51).
Longitudinal
Leadscrew Nut
Figure 50. Longitudinal leadscrew nut.
Cross
Gap
Leadscrew Nut
Cap
Screw
Figure 51. Cross leadscrew nut.
Use a 5mm hex wrench to tighten or loosen
the cap screws on the leadscrew nuts shown in
Figures 50–51, then test the amount of backlash
by slowly rocking the handwheels back-and-forth.
-38-
Gap
Gap
Cap
Screws
Cap
Screws
Gap
Cap
Screw
V-Belt Replacement
If the belt is cracked, frayed, or shows signs of
slipping and glazing you must replace it.
Tools Needed
Wrench 17mm.................................................... 1
Hex Wrench 5mm .............................................. 1
To replace the V-belt:
1.
DISCONNECT MILL FROM POWER!
2.
Get an assistant's help, and tilt the head-
stock to approximately 90 degrees (see
Figure 52), then tighten the headstock tilt
lock nuts to hold the headstock in place.
Figure 52. Headstock tilted to 90 degrees.
3.
Using a Phillips screwdriver, remove one of
the belt access plates.
Model G0695 (Mfd. Since 01/17)
Qty
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