model g0695 (mfg. since 9/10) -41 -
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 longitud inal and cross
leadscrew can b e adjusted by changing the gap
in the leadscrew nuts (see figures 63–64).
figure 63. Longitudinal leadscrew nut.
Longitudinal
Leadscrew nut
Gap
Gap
Cap
Screws
Cap
Screw
Use a 5mm hex wrench to tighten or loosen the cap
screws on the leadscrew nuts shown in figures
63–64, then test the amount of backlash by slowly
rocking the handwheels back-and-forth.
figure 64. Cross leadscrew nut.
Gap
Gap
Cap
Screws
Cap
Screw
Cross
Leadscrew nut
V-belt Replacement
if the belt is cracked, frayed, or shows signs of
slipping and glazing you must replace it.
Tools Needed Qty
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
(figure 65), then tighten the headstock tilt
lock nuts to hold the headstock in place.
3. Using a phillips screwdriver, remove one of
the belt access plates.
figure 65. headstock tilted to 90 degrees.