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-58-
Model G0602/G0752 (Mfg. Since 11/12)
Operation
Symptom Possible Cause Possible Solution
Entire machine
vibrates upon
startup and while
running.
1. Workpiece is unbalanced.
2. Workpiece is hitting stationary object.
3. Loose or damaged V-belt(s).
4. V-belt pulleys are not properly aligned.
5. Chuck or faceplate is unbalanced or not
installed properly.
6. Change gears not aligned or no backlash.
7. Worn or broken gear present.
8. Broken gear or bad bearing.
9. Spindle bearings at fault.
1. Re-install workpiece as centered with the spindle
bore as possible.
2. Stop lathe immediately and correct interference
problem.
3. Re-tension/replace the V-belt(s) as necessary (see
Page 64).
4. Align the V-belt pulleys.
5. Check installation; re-balance chuck or faceplate;
contact a local machine shop for help.
6. Adjust change gears and establish backlash.
7. Inspect gears, and replace if necessary.
8. Replace broken gear or bearing.
9. Reset spindle bearing preload or replace worn
spindle bearings.
Bad surface finish. 1. Wrong spindle speed or feed rate.
2. Dull tooling or poor tool selection.
3. Tool height not at spindle centerline.
4. Too much play in gibs.
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 (see Page
40).
4. Tighten gibs (see Page 61).
Tapered tool difficult
to remove from
tailstock quill.
1. Quill is not retracted all the way back into
the tailstock.
2. Contaminants not removed from taper
before inserting into quill.
1. Turn the quill handwheel until it forces the tapered
tool out of quill.
2. Clean the taper and bore, then re-install tool.
Cross slide,
compound rest, or
carriage feed has
sloppy operation.
1. Gibs are out of adjustment.
2. Handwheel is loose or backlash is high.
1. Adjust gibs (see Page 61).
2. Tighten handwheel fasteners, adjust handwheel
backlash to a minimum (see Page 60).
Cross slide,
compound, or
carriage feed
handwheel hard to
move.
1. Dovetail ways loaded with shavings, dust,
or grime.
2. Gib screws are too tight.
3. Backlash setting too tight.
4. Bedways are dry.
1. Clean ways and re-lubricate.
2. Loosen gib screw(s) slightly (see Page 61).
3. Slightly loosen backlash setting (see Page 60).
4. Lubricate bedways/ball oilers.
Cutting tool
or machine
components vibrate
excessively during
cutting.
1. Tool holder not tight enough.
2. Cutting tool sticks too far out of tool holder;
lack of support.
3. Gibs are out of adjustment.
4. Dull cutting tool.
5. Incorrect spindle speed or feed rate.
1. Check for debris, clean, and re-tighten.
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 affected component (see Page 61).
4. Replace or resharpen cutting tool.
5. Use the recommended spindle speed and feed rate.