Grizzly Heavy Duty Mill/ G1006 - Manual (Page 40)

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Machine has
vibration or noisy
operation.
1. Motor or component is loose.
2. V-belts are slapping belt cover; are
worn or loose.
3. Belt pulley is loose.
4. Motor mount loose/broken.
5. Machine is incorrectly mounted or sits
unevenly.
6. Workpiece is loose.
7. Motor fan is rubbing on fan cover.
8. Cutter is at fault.
9. Bit is chattering.
10. Motor bearings are at fault.
1. Inspect/replace stripped or damaged bolts/
nuts, and re-tighten with thread locking fluid.
2. Replace/re-tension V-belts.
3. Replace shaft, pulley, setscrew, and key as
required.
4. Tighten/replace.
5. Tighten/replace anchor studs in floor; relocate/
shim machine.
6. Use the correct holding fixture and re-clamp
workpiece.
7. Replace dented fan cover; replace loose/
damaged fan.
8. Replace out-of-round cutter; replace/resharpen
cutter; use appropriate feed rate and cutting RPM.
9. Replace/sharpen bit; index bit to workpiece;
use appropriate feed rate and cutting RPM.
10. Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
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Tool slips in collet. 1. Collet is not fully drawn up into spindle
taper.
2. Wrong size collet.
3. Debris in collet or in spindle taper.
4. Taking too big of a cut.
1. Snug up draw bar.
2. Measure tool shank diameter and match with
appropriate diameter collet.
3. Remove all oil and debris from collet and spindle
taper.
4. Lessen depth of cut and allow chips to clear.
Breaking tools or
cutters. 1. RPM and or feed rate is too fast.
2. Cutting tool getting too hot.
3. Taking too big of a cut. 1. Set correct RPM and feed rates.
2. Use coolant fluid or oil for appropriate application.
3. Lessen depth of cut and allow chips to clear.
Machine is loud
when cutting.
Overheats or bogs
down in the cut. 1. Excessive depth of cut.
2. Dull cutting tools. 1. Decrease depth of cut.
2. Use sharp cutting tools.
Workpiece vibrates
or chatters during
operation. 1. Table locks not tight.
2. Quill lock not tight.
3. Workpiece not securely clamped to table
or into mill vice.
4. RPM and feed rate too high.
1. Tighten down table locks.
2. Tighten quill lock.
3. Check that clamping is tight and sufficient for the
job. Make sure mill vice is tight to the table.
4. Use appropriate RPM and feed for the job.
Table is hard to
move. 1. Table locks are tightened down.
2. Chips have loaded up on ways.
3. Ways are dry and in need of lubrication.
4. Limit stops are interfering.
5. Gibs are too tight.
1. Make sure table locks are fully released.
2. Frequently clean away chips that load up during
milling operations.
3. Lubricate ways and handles.
4. Check to make sure that all limit stops are floating
and not hitting the limit switch.
5. Adjust gibs (see Page 33).
Bad surface finish. 1. Wrong RPM or feed rate.
2. Dull cutting tool or poor cutting tool selec-
tion.
3. Wrong rotation of cutting tool.
4. Workpiece not securely clamped.
1. Adjust for appropriate RPM and feed rate.
2. Sharpen cutting tool or select a better cutting tool
for the intended operation.
3. Check for proper cutting rotation for cutting tool.
4. Secure properly.
Motor & Electrical (Continued)
Operation & Work Results