Grizzly G0801 Owner's Manual page 47

Mill
Symptom Possible Cause
Tool loose in 1. Tool is not fully drawn up into spindle taper.
spindle.
2. Debris on tool or in spindle taper before tool
installed.
3. Taking too big of a cut.
Breaking tools or 1. Spindle speed/feed rate is too fast for
cutters.
workpiece material or tooling.
2. Cutting tool is too small.
3. Cutting tool getting too hot.
4. Taking too big of a cut.
5. Spindle extended too far down.
Workpiece or tool 1. Table locks not tight.
vibrates or chatters
2. Workpiece not secure.
during operation.
3. Spindle speed/feed rate is too fast for
workpiece material or tooling.
4. Spindle extended too far down.
5. Quill lock lever not tight.
6. Gibs too loose in table.
Table is hard to 1. Table locks are tightened down.
move.
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.
Bad surface finish. 1. Spindle speed/feed rate is too fast.
2. Dull or incorrect cutting tool.
3. Wrong rotation of cutting tool.
4. Workpiece not secure.
5. Spindle extended too far down.
Cutting results not 1. Spindle is not 90° to table.
square.
2. Table travel is inconsistent.
Spindle overheats. 1. Poor spindle bearing lubrication.
2. Spindle bearings too tight.
3. Spindle operated at high speeds for
extended period.
Lack of power at 1. Belts are loose/slipping/worn/oily.
spindle.
2. Wrong voltage.
Spindle switch does 1. Shorted/disconnected wiring.
not work. 2. Switch at fault.
Fine downfeed 1. Selector knob not engaged with key on
selector does not shaft.
function.
Model G0801/G0802 (Mfd. Since 09/15)
Possible Solution
1. Tighten drawbar.
2. Clean tool and spindle taper.
3. Lessen depth of cut and allow chips to clear.
1. Set spindle speed correctly or use slower feed rate
(Page 30).
2. Use larger cutting tool and slower feed rate.
3. Use coolant or oil for appropriate application.
4. Lessen depth of cut and allow chips to clear.
5. Fully retract spindle and raise table (Pages 27 and
32) to increase rigidity.
1. Tighten table locks (Page 27).
2. Properly clamp workpiece on table or in vise.
3. Set spindle speed correctly or use slower feed rate
(Page 30).
4. Fully retract spindle and raise table (Pages 27 and
32) to increase rigidity.
5. Tighten quill lock lever (Page 32).
6. Tighten gibs (Page 47).
1. Fully release table locks (Page 27).
2. Frequently clean away chips or debris.
3. Lubricate ways (Page 39).
4. Make sure that table limit stops are not in the way.
5. Adjust gibs (Page 47).
1. Set spindle speed correctly or use slower feed rate
(Page 30).
2. Sharpen cutting tool or select one that better suits
the operation.
3. Check for proper cutting tool rotation.
4. Properly clamp workpiece on table or in vise.
5. Fully retract spindle and raise table (Pages 27 and
32). This increases rigidity.
1. Tram the spindle (Page 50).
2. Adjust gibs (Page 47).
1. Replace spindle bearings.
2. Properly adjust spindle bearing preload.
3. Allow spindle to cool during regular intervals.
1. Properly tension belts (Page 48). Replace belts if
worn or contaminated with grease or oil.
2. Correct voltage.
1. Inspect wiring connections.
2. Replace/repair as necessary.
1. Remove selector knob and re-install, making sure it
is engaged with key on shaft.
-45-