Tramming Spindle - Grizzly G0726 Owner's Manual

Tramming Spindle

When your operation requires that the spindle
axis be precisely perpendicular to the table, you
must tram the spindle with the table.
This procedure involves mounting a dial indicator
to the quill or spindle, rotating it around the table,
and adjusting the head position so that the spindle
axis is 90° to the table X- and Y-axis, as illustrated
in Figure 76.
Y-Axis
9 0 º
Figure 76. Spindle centerline properly trammed
to the table.
Note: Keep in mind that the top surface of your
workpiece will not likely be exactly parallel with the
table top. Depending on your operation, you may
choose to tram the spindle to the top surface of
the workpiece after it is mounted instead of tram-
ming to the table.
-54-
Spindle
Z-Axis
9 0
º
X-Axis
Table
Tools Needed
Dial Indicator (with at least 0.0005" resolution) . 1
Indicator Holder (mounted on quill/spindle) ....... 1
Precision Parallel Block ..................................... 1
Note: A precision-ground plate can be substituted
for the parallel block. The farther the indicator
point can be placed from the spindle axis, the
more accurate the alignment measurements will
be.
To tram the spindle to the table:
1.
DISCONNECT MILL FROM POWER!
2.
Prepare mill by performing the following
tasks:
— Stone table to remove all nicks and burrs,
then clean off all debris. Verify table is
clean by running your hand over the top of
it.
— Position table for the milling operation you
intend to perform after tramming—prefer-
ably centered with saddle.
— Tighten any table, knee, quill, or ram locks
that should be tight during the intended
milling operation.
3. Place parallel block underneath spindle.
4. Install indicator holder into spindle or onto
quill, then mount indicator onto it so that
the point is as parallel to the block as pos-
sible (see the illustration in Figure 77 for an
example).
Indicator
Holder
Dial Indicator
Parallel Block
Table
Figure 77. Dial indicator mounted.
Model G0726 (Mfg. Since 7/11)
Qty
Spindle