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Symptom
Possible Cause
Vibration noise
1. Dented fan cover on motor.
while machine
is running; noise
remains constant
when speed is
changed.
Motor is running but
1. Belt is loose, broken, or has come off pul-
spindle is not turn-
leys.
ing.
Excessive vibration.
1. Workpiece mounted incorrectly.
2. Workpiece warped, out of round, or is
flawed.
3. Spindle speed is set too fast for mounted
workpiece.
4. Lathe is resting on an uneven surface.
5. Motor mount bolts are loose.
6. Belt is worn or damaged.
7. Spindle bearings are worn.
Chisels grab or dig
1. Tool rest set too low.
into workpiece.
2. Tool rest set too far from workpiece.
3. Wrong chisel/tool being used.
4. Chisel/tool dull.
Bad surface finish.
1. Wrong spindle speed.
2. Dull chisel or wrong chisel being used for
the operation.
Tailstock moves.
1. Tailstock mounting bolt loose.
2. Too much clamping pressure applied by
tailstock.
3. Bed surface is oily or greasy.
Spindle RPM dis-
1. Spindle RPM sensor is misaligned from
play is not function-
sensor ring.
ing.
Can't remove
1. Tailstock barrel had not retracted all the
tapered tool from
way back into the tailstock.
tailstock barrel.
2. Debris was not removed from taper before
inserting into barrel.
G0657/G0658 Benchtop Lathe
Possible Solution
1. Replace or adjust fan cover. Inspect motor fan and
replace if damaged.
1. Inspect belt and tighten, reinstall, or replace if dam-
aged.
1. Re-mount workpiece, making sure that centers are
embedded in true center of workpiece.
2. Cut workpiece to correct, or use a different
workpiece.
3. Reduce the spindle speed.
4. Shim or adjust feet to remove any wobbles.
5. Tighten motor mount bolts.
6. Replace belt.
7. Replace spindle bearings.
1. Set tool rest higher. See Page 26 for how to prop-
erly set the tool rest height.
2. Move the tool rest closer to the workpiece. See
Page 26 for the proper workpiece/tool rest clear-
ance.
3. Use the correct chisel/tool; educate yourself by
reading books, trade magazines, or seeking help
from an experienced lathe operator.
4. Sharpen or replace the chisel/tool you are using.
1. Use trial-and-error to find a better spindle speed.
2. Sharpen chisel or try a different chisel.
1. Tighten.
2. Apply less clamping pressure with tailstock.
3. Clean bed surface to remove oil/grease.
1.
Align sensor ring to RPM sensor and set gap to
approximately
/
".
1
16
1. Turn the barrel handwheel until it forces taper out of
barrel.
.
2
Always make sure that taper surfaces are clean.
-31-
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