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Eastwood Technical Assistance: 800.343.9353 >> [email protected]
SETTINGS AND ADJUSTMENTS
Occasionally, it may be necessary to readjust various components in order to maintain
optimum performance. The adjustments that may be performed are as follows:
GIB STRIP ADJUSTMENTS
Both the Headstock and the Table are mounted in “Dovetail Slides”. Between the sloping
surfaces on one side of the Dovetails, a ‘Gib Strip’
(FIGS 22 & 23)
is inserted, which
may be tightened against the Dovetails by four adjusters, or ‘Gib’ Screws, mounted
along their length
(FIGS 24 & 25)
.
The Headstock Gib Screws are located on the right-hand side of the Headstock, directly
behind the Downfeed Handwheel
(FIG 24)
, while the Table Gib Screws are located at
the front of the Table Bed adjacent to the Cross-Feed Lock Lever
(FIG 25)
.
In time, wear will occur on the mating surfaces resulting in a ‘sloppiness’ of action.
To adjust the Gib Strips, make up for normal wear and keep the Slides moving evenly
and smoothly, proceed as follows:
1.
Loosen and back off all lock nuts, then thread in the Gib Screws an even amount.
2.
The Slide should be held firmly. Test by trying to rotate the Handwheel, but do not
force it.
3.
Back out each Gib Screw 1/4 of a turn only, then retighten the lock nuts.
NOTE:
do not allow the Gib Screws to turn while tightening the lock nuts.
4.
Test once again by turning the Handwheel. The Slide movement should be even
and smooth along the complete length.
5.
If movement is too loose, loosen the lock nuts, turn in each Gib Screw 1/8 of a
turn and re-tighten locknuts without moving the Gib Screws.
6.
If movement is too tight, loosen the lock nuts, back out Gib Screws 1/8 turn each
and re-tighten locknuts without moving the Gib Screws.
7.
Test once again and repeat steps 4 and 5 or 6 if required.
8.
When adjustments are completed, retract the Slide fully and apply a light machine
oil to all mating surfaces and the Feed Screw thread, then wind the Slide back to
the normal position.
NOTE:
It is extremely important that the Gib adjustments are correctly performed, and
that no “sloppiness” exists.
Any mis-adjustments will have an adverse effect on the ability of the Mill to hold toler-
ances and will transfer to the cutting operation. It is critical to have as little movement
of the Headstock and Table as possible.
BACKLASH COMPENSATION
It is inherent to the function of the drive mechanisms in the Headstock and Table Slides
that some backlash exists. To compensate:
1.
Rotate the Handwheel a small amount in the OPPOSITE direction of the intended
dimension then stop.
2.
Very Slowly begin to rotate the Handwheel to the desired dimension until the
Slide begins to move. Stop all motion.
3.
At this point, all backlash has been removed, the Radial Gauge can be rotated to
align the Pointer with Zero and the slide moved to the desired dimension.
4.
Be sure to engage the appropriate Lock Lever to prevent the Table Travel, Cross-
Feed or Headstock from moving.
FIG. 22
FIG. 23
FIG. 24
FIG. 25
Gib
Strip
✓
Gib Strip
✓
✓
✓
✓
✓
✓
✓
✓
✓
