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speed range levers
When changing the spindle speed range,
the spindle direction will reverse. Always
know which way the spindle is spinning
before engaging the cutting tool with your
workpiece.
3.
Move the spindle speed range lever to the
desired range (see Figures 31–32).
Note: For the Model G9903, you must press
the speed range lever in toward the head-
stock to retract the locking pin and move it.
It may be necessary to rotate the spindle by
hand to ensure the speed range gears have
properly engaged.
Figure 31. Model G9901/G9902 spindle speed
range lever (shown in the low range).
NOTICE
To avoid damage to the drive gears, make
sure the mill is turned OFF and the spindle
is stopped before you change the spindle
speed range.
Model G9901/G9902/G9903 Milling Machine
Figure 32. Model G9903 spindle speed range
lever (shown in high range).
NOTICE
Your milling machine is not designed to run
in the neutral position of the speed range
lever. Doing so may cause damage to the
drive gears.
Configuring Spindle Speed Controls
(G9901 & G9902)
1.
DISCONNECT THE MILL FROM POWER!
2.
Remove the two side belt covers to access
the V-belt and pulleys (see Figure 33).
Spindle
Pulley
Figure 33. Model G9901/G9902 side belt cover
removed (right side shown).
Motor
Pulley
-33-
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