Power Feed - Grizzly G0808 Owner's Manual

Drilling Operation
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.
3. Taking too big of a cut.
Breaking tools or 1. Spindle speed/feed rate is too fast.
cutters.
2. Taking too big of a cut.
3. Cutting tool is too small.
4. Cutting tool getting too hot.
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.
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 tightened down.
move.
2. Chips loaded up on ways.
3. Ways dry and need lubrication.
4. Table limit stops interfering.
5. Gibs too tight.
Bad surface finish. 1. Spindle speed/feed rate too fast.
2. Dull or incorrect cutting tool/bit.
3. Wrong rotation direction of cutting tool.
4. Workpiece not secure.
5. Spindle extended too far down.
Cutting/drilling 1. Table and spindle not at 90° to each other.
results not square.
2. Table travel is inconsistent.
Spindle overheats. 1. Machine operated at high speeds for
extended period.
Lack of power at 1. Wrong voltage.
spindle.
Spindle does not 1. Poorly adjusted return spring.
fully retract.
2. Worn return spring.

Power Feed

Symptom Possible Cause
Power feed does 1. Table locked.
not move table or is
2. Direction lever not engaged.
slipping.
3. Gears not meshing or teeth missing.
4. Motor shaft and gear shaft not engaged.
Operates at high 1. Rapid traverse button at fault.
speed only or is
2. Wiring harness unplugged from circuit
inconsistent.
board.
Model G0808 (Mfd. Since 11/15)
Possible Solution
1. Tighten drawbar (Page 30).
2. Clean tool and spindle taper, then re-install.
3. Lessen depth of cut and allow chips to clear.
1. Reduce spindle speed (Page 33); reduce feed rate.
2. Decrease depth of cut and allow chips to clear.
3. Use larger cutting tool and slower feed rate.
4. Use coolant or oil for appropriate application.
5. Fully retract spindle and raise table (Pages 27 &
31). This increases rigidity.
1. Tighten table locks (Page 27).
2. Properly clamp workpiece on table or in vise.
3. Reduce spindle speed (Page 33); reduce feed rate.
4. Fully retract spindle and raise table (Pages 27 &
31). This increases rigidity.
5. Tighten quill lock lever (Page 31).
6. Tighten gibs (Page 46).
1. Make sure table locks are fully released (Page 27).
2. Frequently clean away chips that load up during
operations.
3. Lubricate ways.
4. Adjust table limit stops out of the way.
5. Adjust gibs (Page 46).
1. Reduce spindle speed (Page 33); reduce feed rate.
2. Sharpen cutting tool or select one that better suits
the operation.
3. Reverse cutting tool rotation.
4. Properly clamp workpiece on table or in vise.
5. Fully retract spindle (this increases rigidity), and
raise table (Pages 27 & 31).
1. Tram spindle (Page 48).
2. Adjust gibs (Page 46).
1. Allow machine to cool.
1. Correct voltage.
1. Increase return spring tension (Page 43).
2. Replace return spring.
Possible Solution
1. Disengage table locks (Page 27).
2. Select speed, engage direction lever (Page 28).
3. Check gears and adjust/replace.
4. Replace clutch.
1. Inspect/replace rapid traverse button.
2. Reconnect wiring harness.
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