PROBLEM CAUSE SOLUTION
Machine
vibrates when
started and
when allowed
to run
1. Workpiece unbalanced. 1. Center the workpiece and reinstall
2. Loose or broken belts. 2. Tighten or replace.
3. Pulleys misaligned. 3. Align pulleys.
4. Broken gear. 4. Inspect the gears and replace if needed.
5. Chuck or faceplate unbalanced. 5. Rebalance or replace if needed.
6. Spindle bearings worn out. 6. Replace bearings.
Poor surface
finish
1. Feed rate or RPM wrong. 1. Set the proper feed rate and RPM.
2. Dull cutting tool. 2. Sharpen cutting tool.
3. Too much play in gibs. 3. Tighten gibs (page 20).
4. Cutting tool set too high. 4. Remove tool or use a smaller tool.
Can’t remove
center or chuck
from tailstock
1. Quill isn’t retracted completely into
tailstock.
1. Turn the quill handle until the tool is forced out.
2. Debris in the quill.
2. Always clean taper surfaces. Try and force out
with WD40 and handle.
Cross slide,
compound slide,
or carriage have
poor feed
1. Gibs are out of alignment. 1. Adjust gib screws (page 20).
2. Handles are loose. 2. Tighten handles.
3. Lead screw worn out or needs greas-
ing.
3. Tighten fasteners on lead screw.
4. Bedways are worn and need greas-
ing.
4. Grease bedways.
5. Dirt, shavings or grime in bedways. 5. Clean bedways.
Surface finish
uneven from
end to end
1. Headstock and tailstock are mis-
aligned.
1. Realign the tailstock and headstock.
Chuck jaws
getting stuck
and hard to
move
1. Debris in the chuck jaws.
1. Remove jaws and clean out the chuck threads,
lubricate.
Carriage difficult
to feed or won’t
move
1. Gibs are too tight. 1. Loosen gibs.
2. Chips or debris in the bedway. 2. Clean bedways.
3. Carriage lock tightened down. 3. Release carriage lock.
4. Bedways dry. 4. Lubricate bedway.
5. Half nuts not engaged with lead
screw.
5. Engage half nuts with lead screw.
6. Gears broken. 6. Replace broken gears.
7. Loose feed handles. 7. Tighten handle.
Gear change
lever won’t shift
1. Gears misaligned. 1. Rotate spindle until the gears rotate into place.
TROUBLESHOOTING GUIDDE
23
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