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
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
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 16). Be sure the belt tension lever moves freely to release tension from the belt.
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Figure 16. Belt tension lever.
3.Open the rear access covers (Figure 17).
Upper Access Cover
Lower Access
Cover
Figure 17. Side and rear access covers.
G0657/G0658 Benchtop Lathe
Figure 18. 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 19, then tighten belt tension lever screw.
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