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Changing Spindle
Speed
The Model G0784 is capable of twelve different
spindle speed RPMs. Spindle speed is controlled
by the configuration of V-belts and pulleys located
inside the belt cover on top of the machine.
Tools Needed
Hex Wrench 6mm .............................................. 1
To change spindle speeds:
1.
DISCONNECT MACHINE FROM POWER!
2.
Loosen motor lock lever shown in Figure
12, pull motor inward to relieve tension on
V-belts, then re-tighten lock lever.
Motor Lock Lever
Figure 12. Location of motor lock lever, used
when changing V-belt positions to select desired
spindle speed.
Spindle Pulley
Model G0784 (Mfd. since 03/15)
3.
Qty
4.
5.
6.
RPM
Position
RPM
140
4-5
819
219
3-5
1075
263
4-6
1238
317
2-5
1450
413
3-6
1770
475
4-7
2436
Idler Pulley
1
2
3
4
Figure 14. Spindle speed chart.
Open belt cover, then loosen two idler cap
screws (see Figure 13) that hold idler pulley
in place, so it can move freely.
Tip: Lower headstock for easy access (see
Headstock Position on Page 24).
Idler Cap Screws
Figure 13. Spindle speed pulley system.
With center and rear pulleys loose, move
V-belts to corresponding position for desired
speed (see chart below).
Loosen motor locking lever and allow spring
to tighten rear V-belt, then re-tighten motor
locking lever.
Retighten idler cap screws, then close and
latch belt cover.
Position
1-6
2-7
3-8
1-7
2-8
1-8
5
6
7
8
Motor Pulley
-21-
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