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Bad surface finish. 1. Wrong spindle speed
2. Dull tooling or wrong
3. Tool height not at
4. Too much play in gibs.
Tapered tool
1. Quill not fully retracted
difficult to remove
from tailstock
2. Contaminants
quill.
Cross slide, top
1. Ways
slide, or carriage
feed has sloppy
operation.
2. Gibs
3. Handwheel loose or
4. L e a d s c r e w
Cross slide, top
1. Ways
slide, or carriage
handwheel is hard
2. Gibs are too tight.
to move.
3. Backlash setting too
4. Bedways are dry.
5. Half
Cutting tool
1. Tool holder not tight
or machine
components
2. Cutting tool sticks too
vibrate
excessively during
cutting.
3. Gibs
4. Dull cutting tool.
5. Incorrect
Workpiece is
Headstock and tailstock
tapered.
Chuck jaws will
Chips lodged in jaws or
not move or do
not move easily.
TROUBLESHOOTING
EN
or feed rate.
tool selection.
spindle centerline.
into tailstock.
not
removed from taper
before inserting into
quill.
loaded
with
shavings,
dust,
or
grime.
are
out
of
adjustment.
excessive backlash.
mechanism worn or
out of adjustment.
loaded
with
chips, dust, or grime.
tight.
nut
lever
engaged.
enough.
far out of tool holder;
lack of support.
are
out
of
adjustment.
spindle
speed or feed rate.
not properly aligned.
scroll plate.
1. Adjust for appropriate spindle speed
and feed rate.
2. Sharpen tooling or select a better tool
for the intended operation.
3. Adjust tool height to spindle centerline.
4. Tighten gibs.
1. Turn quill handwheel until tapered tool
is forced out of quill.
2. Clean taper and bore, then re-install
tool.
1. Clean ways and lubricate them.
2. Adjust gibs.
3. Tighten handwheel fasteners, adjust
handwheel backlash to a minimum.
4. Adjust leadscrew to remove end play.
1. Clean ways and lubricate them.
2. Loosen gibs slightly.
3. Slightly loosen backlash setting.
4. Lubricate bedways.
5. Disengage half nut lever for manual
feeding.
1. Check for debris, clean, and retighten.
2. Re-install cutting tool so no more than
1/3 of the total length is sticking out of
tool holder.
3. Adjust gibs at aff ected component.
4. Replace or resharpen cutting tool.
5. Use the recommended spindle speed
and feed rate.
1. Re-align tailstock to headstock spindle
centerline.
1. Remove jaws, clean and lubricate scroll
plate, then replace jaws.
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