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Machine has excessive
vibration or noise.
1. Motor fan rubbing on fan cover. 1. Fix/replace fan cover; replace loose or damaged
fan.
2. Machine incorrectly mounted on
floor or mobile base.
2. Level/shim base; tighten/adjust mounting hardware
or feet.
3. Motor mounting loose. 3. Tighten mounting bolts/nuts; use thread locking
fluid.
4. V-belt at fault. 4. Replace V-belt.
5. Headstock gib loose. 5. Clean, re-lubricate, and readjust headstock gib
(Page 38).
6. Knives are dull. 6. Re-sharpen/replace knives.
7. Motor brushes worn/at fault (feed
motor only).
7. Replace brush set (Page 35).
8. Pulley loose or not in alignment;
shaft bent.
8. Replace worn pulley, key, and shaft, and realign.
9. Gearbox at fault (feed motor
only).
9. Rebuild gearbox for bad gear(s)/bearing(s).
10. Centrifugal switch out of
adjustment; at fault (main motor
only).
10. Adjust/replace centrifugal switch.
11. Motor bearings worn or damaged. 11. Replace motor bearings or replace motor.
12. Cutterhead bearings at fault. 12. Replace bearing(s)/realign cutterhead.
Machine stalls or slows
when operating.
1. Too much pressure when feeding
workpiece.
1. Reduce pressure when feeding workpiece.
2. Workpiece is warped. 2. Straighten workpiece or use a different one.
3. Rails are incorrectly adjusted. 3. Adjust/calibrate rails.
4. Workpiece material not suitable
for machine.
4. Only cut applicable metals with the correct grade
and size of blade or bit.
5. Feed rate or cutting speed too
fast.
5. Decrease feed rate or cutting speed.
6. Belt slipping. 6. Tension/replace belt; ensure pulleys are aligned.
7. Pulley or sprocket slipping on
shaft.
7. Replace pulley and key or set screw. Replace shaft
if worn.
8. Motor connection wired
incorrectly.
8. Review wiring diagram under motor junction box
cover; correct wire connections.
9. Motor brushes at fault (feed motor
only).
9. Remove/replace brushes.
10. Circuit board at fault. 10. Inspect circuitry for arcing or burns. Replace if at
fault (wiring diagram on Page 40).
11. Motor speed rheostat at fault. 11. Test and replace if at fault.
12. Contactor has poor contacts. 12.Test all legs for continuity and power, test field coil
and replace if at fault.
13. Centrifugal switch at fault. 13. Adjust/replace centrifugal switch if available.
14. Motor at fault. 14. Test for shorted windings, bad bearings and repair
or replace.
15. Gears in gearbox broken, slipping,
or stuck.
15. Replace for broken or slipping gears.
Handwheel binds or is
difficult to move.
1. Lock lever is tightened. 1. Loosen lock lever knob.
2. Burr, debris, or gunk hindering way
and column slide.
2. De-burr, clean and re-lubricate the handwheel
leadscrew, ways, and gib.
3. Bushings worn, dry, or damaged. 3. Clean/lubricate/replace shaft and bushings.