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5.
To measure spindle alignment along X-axis,
place the parallel block directly under spindle
and indicator across length of table, as illus-
trated in Figure 78.
Note: If you must re-position quill or knee to
accommodate the above step, then review
tasks in Step 2 to make sure mill is properly
prepared for tramming.
Table (Top View)
Indicator
Figure 78. 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 78, 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
rotating 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 rotation lock bolts snug
so that the head does not move loosely while
you adjust it in small amounts.
Model G0726 (Mfg. Since 7/11)
Parallel Block
Spindle
8.
Re-tighten rotation lock bolts.
Note: It is a good idea to repeat Steps 6-7
again in case the head moved slightly during
the process of re-tightening lock bolts.
9.
Place parallel block directly under spindle
and across width of the table, as illustrated in
Figure 79.
Table (Top View)
Figure 79. Setup for Y-axis adjustment.
10. Rotate spindle so that the indicator point
rests on parallel block, as illustrated in Figure
79, then zero dial.
11. Rotate spindle so that the indicator point
rests on other end of the block in the same
manner, then read dial.
— If indicator dial still reads zero or is within
the acceptable variance, spindle is pre-
cisely perpendicular to table in both X- and
Y-axis and the tramming procedure is com-
plete.
— If indicator dial has moved from zero
beyond the acceptable variance, you will
need to compensate for that amount by tilt-
ing the head forward or backward. Repeat
Steps 9–10 until you are satisfied with
spindle axis alignment along the table
Y-axis.
Tip: Keep one of the tilt lock bolts snug so
that the head is not completely loose while
you adjust it in small amounts.
12. Re-tighten tilt lock bolts.
Note: It is a good idea to repeat Steps 10–11
again in case the head moved slightly during
the process of re-tightening the lock bolts.
Indicator
Spindle
Parallel Block
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