Grizzly g0669X owner manual Selecting Spindle Speed Range, Setting Spindle Variable Speed

2.Measure the diameter of your cutting tool in inches.

3.Use the following formula to calculate the required RPM for your operation:

3.Press the selector handle in toward the head to retract the locking pin and move it. Make sure the locking pin is seated in the indent for the position you have chosen (see

Figure 37).

Selecting Spindle Speed Range

1.Make sure the spindle motor 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	RPM
Low Range	75–520
High Range	520–4200

Figure 36. Spindle speed ranges.

NOTICE

To avoid damage to the drive system, make sure the spindle motor is turned OFF and the spindle is stopped BEFORE you change the spindle speed range.

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Figure 37. Spindle speed range selector in the

HIGH position.

Note: As you move the selector, it may be necessary 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.

G0669X Precision 10" x 54" VS Milling Machine