Grizzly G0761 Owner's Manual page 38

Symptom
tool slips in spindle.
Breaking tools or cutters.
Workpiece vibrates or
chatters during operation.
table is hard to move.
Bad surface finish.
-36-
Possible Cause
1. tool is not fully drawn up into
spindle taper.
2. debris on tool or in spindle taper.
3. taking too big of a cut.
1. spindle speed/feed rate is too fast.
2. Cutting tool too small.
3. Cutting tool getting too hot.
4. taking too big of a cut.
5. spindle extended too far down.
1. table locks not tight.
2. Workpiece not secure.
3. spindle speed/feed rate is too fast.
4. spindle extended too far down.
1. table locks are tightened down.
2. Chips have loaded up on ways.
3. Ways are dry and need lubrication.
4. table limit stops are interfering.
5. gibs are too tight.
1. spindle speed/feed rate is too fast.
2. using a dull or incorrect cutting tool.
3. Wrong rotation of cutting tool.
4. Workpiece not secure.
5. spindle extended too far down.
Possible Solution
1. tighten drawbar.
2. Clean collet and spindle taper.
3. lessen depth of cut and allow chips to clear.
1. set spindle speed correctly (Page 26) or use slower
feed rate.
2. use larger cutting tool and slower feed rate.
3. use coolant or oil for appropriate application.
4. decrease depth of cut.
5. Fully retract spindle and lower headstock. this
increases rigidity.
1. tighten down table locks.
2. properly clamp workpiece on table or in vise.
3. set spindle speed correctly (Page 26) or use a
slower feed rate.
4. Fully retract spindle and lower headstock. this
increases rigidity.
1. Make sure table locks are fully released.
2. Frequently clean away chips that load up during
milling operations.
3. lubricate ways (Page 32).
4. Check to make sure that all table limit stops are not
in the way.
5. Adjust gibs (see Page 37).
1. set spindle speed correctly (Page 26) or use a
slower feed rate.
2. sharpen cutting tool or select one that better suits
the operation.
3. Check for proper cutting rotation for cutting tool.
4. properly clamp workpiece on table or in vise.
5. Fully retract spindle and lower headstock. this
increases rigidity.
Model G0761 (Mfd. Since 10/13)