Grizzly G3616 Owner's Manual page 43

Machine Performance
SYMPTOM
Tool slips in collet.
Breaking tools or cutters.
Machine is loud when
cutting. Overheats or bogs
down in the cut.
Workpiece vibrates or
chatters during operation.
Table hard to move.
Micro-feed adjuster won't
lower the quill.
Bad surface finish.
G3616/G3617 Mill
POSSIBLE CAUSE
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. RPM and or feed rate is too fast.
2. Cutting tool getting too hot.
3. Taking too big of a cut.
1. Excessive depth of cut.
2. Dull cutting tools.
1. Table locks not tight.
2. Spindle lock not tight.
3. Workpiece not securely clamped to
table or into mill vise.
4. RPM and feed rate too high.
1. Table locks are tightened down.
2. Chips have loaded up on bedways.
3. Bedways are dry and in need of
lubrication.
4. Longitudinal stops are interfering.
5. Gibs are too tight.
1. Quill knob is not tightened down
1. Wrong RPM or feed rate.
2. Dull cutting tool or poor cutting tool
selection.
3. Wrong rotation of cutting tool.
CORRECTIVE ACTION
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.
1. Use tables to set correct RPM and feed rates.
2. Use cutting fluid or oil for appropriate application.
3. Lessen depth of cut and allow chips to clear.
1. Decrease depth of cut.
2. Use sharp cutting tools.
1. Tighten down table locks.
2. Tighten spindle lock.
3. Check that clamping is tight and sufficient for the
job. Make sure mill vise is tight to the table.
4. Use appropriate RPM and feed for the job.
1. Check to make sure table locks are fully released.
2. Frequently clean away chips that load up during
milling operations.
3. Lubricate bedways and handles.
4. Check to make sure that stops are floating and not
hitting the center stop.
5. Loosen gib screw(s))
1. Turn the quill knob clockwise to tighten and engage
the micro-feed adjuster.
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.
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