Model G0827 (Mfd. Since 11/17)
-61-
Note: The front spanner nut adjusts the
amount of backlash, and the rear spanner nut
when tightened, locks the front spanner nut
setting.
3. Loosen rear spanner nut and tighten front
spanner nut until slightly snug.
4. Re-tighten rear spanner nut to lock front
spanner nut setting.
5. Check amount of backlash by rotating Y-axis
handwheel.
6. Repeat Steps 3–5 if necessary.
1. DISCONNECT MACHINE FROM POWER!
2. Locate Y-axis leadscrew backlash adjust-
ing spanner nuts underneath knee (see
Figure 99).
Figure 99. Y-axis leadscrew backlash adjusting
spanner nuts (viewed underneath knee).
Adjusting Y-Axis Leadscrew
Backlash
Front
Spanner
Nut
Rear
Spanner
Nut
Adjusting Gibs
Gibs are tapered lengths of metal that are sand-
wiched between two moving surfaces. Gibs con-
trol the gap between these surfaces and how they
slide past one another. Correctly adjusting the
gibs is critical to producing good results.
Correctly positioning gibs is a matter of trial and
error and patience. Tight gibs make table move-
ment more accurate but stiff. Loose gibs make
table movement sloppy but easier to do. The goal
of gib adjustment is to remove unnecessary slop-
piness without causing the ways to bind.
Many experienced machinists adjust the gibs just
to the point where they can feel a slight drag in
table movement.
Screws on each end of the X- and Y-axis gibs
allow gib adjustment to increase or decrease the
friction between the sliding surfaces. The excep-
tion to this arrangement is the column dovetail
way (Z-axis) gibs.
DISCONNECT MACHINE FROM POWER
BEFORE ADJUSTING GIBS!
Tools Needed
Qty
Flat Head Screwdriver ....................................... 1
Hex Wrench 6mm .............................................. 1
Hex Wrench 10mm ............................................ 1
Open-End Wrench 19mm .................................. 1
6. Repeat Steps 3–5 if necessary.
Summary of Contents for G0827
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