Grizzly G0757 Owner's Manual page 55

Symptom
Tool loose in spindle.
Breaking tooling.
Workpiece vibrates or
chatters during operation.
Table is hard to move.
Bad surface finish.
Cutting results not square.
Model G0757 (Mfg. Since 6/13)
Possible Cause
1. Tool is not fully drawn up into
spindle taper.
2. Debris on tooling or in spindle taper.
3. Taking too big of a cut.
1. Spindle speed/feed rate is too fast.
2. Tooling too small.
3. Tooling 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 tooling.
3. Wrong rotation of tooling.
4. Workpiece not secure.
5. Spindle extended too far down.
1. Table and spindle are not at 90° to
each other.
Possible Solution
1. Tighten drawbar.
2. Clean tooling and spindle taper.
3. Lessen depth of cut and allow chips to clear.
1. Set spindle speed correctly (Page 31) or use slower
feed rate.
2. Use larger tooling 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 31) or use a
slower feed rate.
4. Fully retract spindle and raise table. This increases
rigidity.
1. Make sure table locks are fully released.
2. Frequently clean away chips that load up during
operations.
3. Lubricate ways (Page 42).
4. Check to make sure that all table limit stops are not
in the way.
5. Adjust gibs (see Page 52).
1. Set spindle speed correctly (Page 31) or use a
slower feed rate.
2. Sharpen tooling or select one that better suits the
operation.
3. Check for proper cutting rotation for tooling.
4. Properly clamp workpiece on table or in vise.
5. Fully retract spindle and raise table. This increases
rigidity.
1. Tram the spindle (Page 34).
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