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-12- G2891 Lathe Copy Attachment
Cable Tension
SECTION 4: ADJUSTMENTS
The movement of the carriage assembly along
the body of the Copy Attachment is controlled by
the movement of the Longitudinal-Feed
Handwheel. This Handwheel is connected to the
carriage via a cable. This cable should be taut to
ensure responsive movement of the carriage.
The cable can be tightened by loosening the bolt
at the control rod. See Figure 8. The cable
should then be pulled snugly, but not so tight that
stress is placed on the cable. Once snug, re-tight-
en the bolt to secure the cable.
Gib Adjustment
The carriage slides along the Copy Attachment
bed on brass strips called gibs. These gibs are
the means by which you adjust the amount of
friction or play between the carriage and the bed.
Figure 8. Adjusting carriage cable tension.
Figure 9. Adjusting the gib tightness.
The goal of gib adjustment is to provide as little
play as possible between the carriage and the
bed while still allowing free movement of the car-
riage.
There are eight adjustment locations: 2 on the
front of the carriage, 2 on the back and 4 under-
neath.
To adjust the gibs:
1. Loosen the lock nut(s) and and loosen or
tighten the setscrews with the 3mm Allen
®
wrench.
2. Slide the carriage back and forth to test for
binding and re-adjust until the carriage
travels smoothly, without binding or excess
wobble.
3. When adjustments are complete, tighten
the lock nuts while maintaining the
setscrew position with the Allen
®
wrench.
See Figure 9. Re-test after tightening.