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Changing Speed
Ranges
the variable speed motors on the Model g0657
and g0658 allow the spindle speed to vary
within three separate ranges. For greater speed
variations, the belt in the headstock can be
repositioned. a label on the top of the headstock
illustrates the belt positions and their speeds.
To change speeds:
1.
disConneCt lathe FroM poWer!
2.
loosen the belt tension screw handle (figure
17). be sure the belt tension lever moves
freely to release tension from the belt.
belt tension lever
figure 17. belt tension lever.
3.
open the rear access covers (figure 18).
figure 18. side and rear access covers.
Models G0657/G0658 (Mfg. Since 5/13)
belt tension handle
upper access Cover
lower access
Cover
4.
locate the desired speed on the speed chart
on the rear of the lathe bed, and move the
belt to the necessary grooves on the motor
and spindle pulleys.
for Example: as indicated in the speed
chart, on the G0657, belt position B creates
an rpM range of 600-1800 (figure 19).
POSITION
A
B
C
POSITION RPM RANGE
Motor Pulley
figure 19. g0658 spindle speeds.
5.
Move the belt tension lever down, adjusting
tension so that when the belt is pressed with
moderate force, ½" of belt deflection is mea-
sured as shown in figure 20, then tighten
belt tension lever screw.
Deflection
figure 20. belt deflection.
6.
Close the rear covers.
G0657
RPM RANGE
A
1200-3600
B
600-1800
C
300-900
G0658
A
1200-3600
B
600-1800
C
300-900
Pulley
Pulley
-21-
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