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Model G0755 (Mfg. Since 1/13)
-39-
5. Place the parallel block directly under spindle
and indicator across length of table, as illus-
trated in Figure 57.
Note: If you must re-position quill to accom-
modate the above step, then review tasks in
Step 2 to make sure mill is properly prepared
for tramming.
Parallel Block
Indicator
Spindle
Table (Top View)
Figure 57. Setup for the X-axis adjustment.
Note: Generally, the goal is to get the differ-
ence of the indicator readings between ends
of the parallel bar down to 0.0005". However,
the acceptable variance will depend on the
requirements for your operation.
6. Rotate spindle by hand so that the indicator
point rests on one end of parallel block, as
illustrated in Figure 57, then zero dial.
7. Rotate spindle so that the indicator point
rests in the same manner on other end of
block, then read dial.
— If indicator dial still reads zero or is within
the acceptable variance, continue on with
Step 8.
— If indicator dial has moved from zero
beyond the acceptable variance, you will
need to compensate for that amount by
tilting head left or right. Repeat Steps 6–7
until you are satisfied with spindle axis
alignment along table X-axis.
Tip: Keep one of the tilting hex nuts snug so
that the head does not move loosely while
you adjust it in small amounts.
8. Re-tighten tilting hex nuts.
Replacing Power
Feed Carbon
Brushes
The X-axis power feed motor has a carbon brush-
es that will wear with normal use. There is one on
the top of the power feed (see Figure 58) and one
on the bottom.
If, over time, the power feed starts to seem slug-
gish or will not operate, check the carbon brushes.
If they are less than
3
⁄16" in length, replace them
with new ones (Part No. P0755501-6).
Note: For proper performance, replace both car-
bon brushes at the same time.
Use a flat screwdriver to unthread (turn counter-
clockwise) the cap covering the carbon brush,
replace the brush assembly, then secure it with
the cap.
Figure 58. Carbon brush removed from power
feed.
Carbon
Brush
Cap
Brush
Hole