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2.
Measure the diameter of your cutting tool in
inches.
3.
use the following formula to calculate the
required rpM for your operation:
Selecting Spindle Speed Range
1.
Make sure the mill is turned OFF, and the
spindle is stopped.
2.
select the range in the chart below that
includes the spindle speed that you have cal-
culated for your workpiece.
Range
low range
high range
Figure 33. spindle speed ranges.
NOTICE
To avoid damage to the drive system, make
sure the mill is turned OFF and the spindle
is stopped BEFORE you change the spindle
speed range.
3.
Move the spindle speed range selector to the
desired position (see Figure 34).
Figure 34. spindle speed range selector in the
high position.
g0667X high precision Vs Vertical Mill
rpM
60–575
575–5000
Note: You must press the selector handle in
toward the head to retract the locking pin and
move the handle. Make sure the locking pin is
seated in the indent for the position you have
chosen.
As you move the selector, it may be neces-
sary to rotate the spindle by hand to jog and
mesh the gearing.
Setting Spindle Variable Speed
1.
With the spindle in motion, rotate the spindle
speed dial on the control panel until the
spindle has reached the desired speed as
indicated by the spindle speed readout.
Note: The top numbers of the spindle speed
readout are for the high speed range, and
the bottom numbers are for the low speed
range.
NOTICE
Always have the spindle in motion BEFORE
using the spindle speed dial to avoid dam-
age to the variable speed system.
-29-
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