-38-
Model G0838 (Mfd. Since 10/17)
Symptom
Possible Cause
Possible Solution
Bad surface finish.
1. Dull tooling or wrong tool used for task.
2. Tool height is not
1
⁄
8
" above spindle
centerline.
3. Spindle speed is wrong.
4. Excessive vibration.
1. Sharpen tooling, select correct tool for operation.
2. Adjust tool rest so tool is
1
⁄
8
" above spindle
centerline.
3. Adjust for appropriate spindle speed (
Page 26).
4. Troubleshoot possible causes/solutions in this table.
Excessive vibration
upon startup
(when workpiece is
installed).
1. Workpiece is mounted incorrectly.
2. Workpiece warped, out of round, or flawed.
3. Spindle speed too fast for workpiece.
4. Workpiece hitting stationary object.
5. Tailstock, or tool rest not securely clamped
to lathe bed.
6. Belt pulleys are not properly aligned.
7. Lathe is resting on an uneven surface.
8. Motor mount bolts are loose.
9. Belt is worn or damaged.
10. Spindle bearings are worn or damaged.
1. Remount workpiece, making sure that centers are
embedded in true center of workpiece.
2. Cut workpiece to correct, or use a different
workpiece.
3. Reduce spindle speed (
Page 26).
4. Stop lathe and fix interference problem.
5. Check lock levers and tighten if necessary (
Pages
22–23).
6. Align belt pulleys (
Page 40).
7. Shim stand or adjust feet to eliminate wobbles.
8. Tighten motor mount bolts.
9. Replace belt (
Page 39).
10. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Chisel grabs or digs
into workpiece.
1. Wrong chisel/tool being used.
2. Chisel/tool is too dull.
3. Tool rest height not set correctly.
4. Tool rest is set too far from workpiece.
1. Use correct chisel/tool.
2. Sharpen or replace chisel/tool.
3. Correct tool rest height (
Page 22).
4. Move tool rest closer to workpiece.
Tailstock moves
under load.
1. Tailstock mounting bolt/hex nut is loose.
2. Bed or clamping surface is excessively oily
or greasy.
1. Tighten mounting bolt/hex nut.
2. Clean bed or clamping surface to remove excess
oil/grease.
Spindle lacks
turning power or
starts up slowly.
1. Belt is slipping.
2. Pulleys loose.
3. Workpiece too heavy for spindle.
1. Tighten/adjust belt (
Page 39).
2. Tighten pulley set screw; re-align/replace shaft,
pulley set screw, and key.
3. Remove excess material before remounting; use
lighter workpiece.
Quill will not move
forward when
handwheel is turned
1. Keyway is not aligned with quill lock lever.
1. Align quill keyway and quill lock lever and slightly
tighten lever to engage keyway.
DRO doesn't give
reading; reading
incorrect.
1. Shorted/disconnected wiring/plugs.
2. Variable-speed potentiometer at fault.
3. DRO speed sensor at fault.
4. Circuit board at fault.
1. Inspect wiring connections on circuit boards,
sensors, and plugs. Replace/repair as necessary.
2. Test/replace if at fault.
3. Test/replace if at fault.
4. Inspect/replace if at fault.
Wood Lathe Operation
Summary of Contents for G0838
Page 52: ......