Model G0949G (Mfd. Since 01/22)
-67-
Symptom
Possible Cause
Possible Solution
Spindle lacks
turning power
or starts up
slowly.
1. Belts slipping.
1. Tighten belts (
Page 72); inspect for oil/grease on belts
and clean/replace as necessary.
Workpiece is
tapered.
1. Spindle and tailstock centers not properly
aligned with each other.
2. Lathe bed twisted.
1. Re-align tailstock to headstock spindle centerline
(
Page 39).
2. Level lathe (
Page 24).
Gear change
levers will
not shift into
position.
1. Gears not aligned inside headstock/Quick-
Change gearbox.
1. Rotate spindle by hand with light pressure on the
lever until gear falls into place.
Cross slide,
compound,
or carriage
handwheels
hard to move.
1. Ways dry and in need of lubricant.
2. Ways loaded with shavings, dust, or grime.
3. Gibs are too tight.
4. Backlash setting too tight.
1. Lubricate ways/ball oilers (
Page 62).
2. Remove gibs, clean ways, lubricate, re-install, and re-
adjust.
3. Loosen gibs slightly (
Page 69), and lubricate ways.
4. Slightly loosen backlash setting (
Page 68).
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;
lacks support.
3. Workpiece deflecting.
4. Workpiece unbalanced.
5. Gibs out of adjustment.
6. Cutting tool dull.
7. Spindle speed or feed rate incorrect.
1. Tighten tool holder.
2. Re-install cutting tool so no more than
1
⁄
3
of total
length sticks out of tool holder.
3. Use steady or follow rest (
Pages 43–44).
4. Balance workpiece.
5. Adjust gibs (
Page 69).
6. Replace or resharpen cutting tool.
7. Use recommended spindle speed (
Page 48) and feed
rate (
Page 49).
Carriage will
not feed or hard
to move.
1. Gears not all engaged.
2. Half nut lever engaged.
3. Carriage lock tightened down.
4. Chips loaded up on ways.
5. Ways dry and in need of lubrication.
6. Gibs too tight.
7. Shear pin broken.
1. Engage gears using gear levers.
2. Disengage half nut lever.
3. Make sure carriage lock is fully released.
4. Frequently clear away chips that load up during
turning operations.
5. Lubricate ways/ball oilers (
Page 62).
6. Loosen gib screw(s) slightly (
Page 69).
7. Replace gears/shear pin (
Page 73).
Workpiece slips
in chuck.
1. Cutting pressure/feed rate too high.
2. Jaws worn or not installed properly.
1. Reduce cutting force.
2. Remove/re-install properly; turn jaws with cutting tool
so they are concentric; replace jaws as matched set or
chuck.
Summary of Contents for G0949G
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