Table of Contents
Advertisement
Adjusting Backlash
Leadscrew backlash is the amount of free play in
the leadscrew when changing direction of table
movement. Leadscrews always have a certain
amount of backlash that will increase with wear.
Generally, 0.005"–0.010" of backlash is accept-
able.
Tools Needed
Phillips Screwdriver ........................................... 1
Wrench 19mm ................................................... 1
Hex Wrench 5mm .............................................. 1
To adjust Y-axis leadscrew backlash:
1.
DISCONNECT MILL FROM POWER!
2.
Remove front way cover, move table all
the way back, then remove ball handle and
keyed spacers from Y-axis feed leadscrew.
3.
Remove graduated dial assembly, key, and
remaining spacers from leadscrew.
Note: Keep track of small parts as you take
them off, and note the order of assembly.
4.
Remove the two cap screws that hold
power feed unit to the bearing bracket (see
Figure 73).
Cap Screws
Front
Cover
Figure 73. Power feed secured to bearing
bracket.
Model G0726 (Mfg. Since 7/11)
5.
Carefully slide power feed unit off leadscrew
and lay it aside, then remove front cover from
the table.
6.
Loosen the two cap screws on leadscrew nut
shown in Figure 74, then rotate adjustment
plate in small increments.
Qty
Figure 74. Y-axis feed leadscrew nut and
7.
Re-install key and ball handle onto leadscrew,
then test backlash by rocking handle back-
and-forth.
8.
When you are satisfied with the amount of
backlash, re-tighten adjustment plate cap
screws.
9.
Make sure all surfaces are clean of debris,
then re-install components removed for this
procedure.
Bearing
Bracket
The X-axis leadscrew backlash is adjusted in the
same manner. Refer to Figure 75 for the location
of the X-axis backlash adjustment plate as viewed
from the left underside of the table.
Figure 75. X-axis backlash adjustment plate.
Cap Screws
Leadscrew Nut
backlash adjustment plate.
Adjustment Plate
Adjustment
Plate
-53-
Advertisement
Table of Contents
