Southbend 14" METAL CUTTING BANDSAW SB1022 - Manual (Page 40)

TROUBLESHOOTING
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For Machines Mfg. Since 8/09 Model SB1021/SB1022 T R O U B L E S H O O T I N G
If you need replacement parts, or if you are unsure how to do any of the solutions given here, feel free
to call us at (360) 734-1540.
Symptom Possible Cause Possible Solution
Machine does not
start. 1. Power supply switched off/has
incorrect voltage.
1. Switch power supply on/verify voltage.
2. Blown fuse/tripped circuit breaker
at main panel.
2. Correct the cause of overload, then reset/replace
fuse or breaker.
3. Plug or receptacle is corroded or
mis-wired.
3. Clean/retighten contacts; correct the wiring.
4. Thermal overload relay has tripped. 4. Allow relay/motor to cool. If necessary, press reset
button inside switch.
5. Break or short in wiring; or loose
connections.
5. Trace/replace broken or corroded wires; fix loose
connections.
6. Motor ON/OFF switch at fault. 6. Replace switch.
7. Motor connection wired incorrectly. 7. Wire motor correctly (refer to inside junction box
cover or manual).
8. Start capacitor blown or at fault. 8. Replace start capacitor.
9. Contactor not energized/has poor
contacts.
9. Test all legs for power, test field coil and replace if
at fault.
10. Centrifugal switch at fault. 10. Adjust/replace centrifugal switch.
11. Motor at fault. 11. Test for shorted windings, bad bearings and repair
or replace.
Machine has
excessive vibration
or noise. 1. Motor fan rubbing on fan cover. 1. Fix/replace fan cover; replace loose or damaged fan.
2. Motor or table is loose. 2. Tighten any loose fasteners.
3. V-belt(s) loose. 3. Tighten V-belt(s).
4. Guide post lock lever is loose. 4. Tighten the lock lever.
5. Machine incorrectly mounted on
floor.
5. Level/shim base; tighten/adjust mounting hardware
or feet.
6. V-belt(s) worn or damaged. 6. Replace V-belt(s). Use link belts if possible.
7. Pulley loose or not in alignment;
shaft bent.
7. Replace worn pulley, key, and shaft, and realign.
8. Centrifugal switch out of
adjustment; at fault (SB1021 only)
8. Adjust/replace centrifugal switch.
9. Motor bearings worn or damaged. 9. Replace motor bearings or replace motor.
10. Phase converter (if used) wild wire
incorrectly connected (SB1022
only).
10. Connect wild wire to correct leg (must avoid
transformer or sensitive electronics).
Main motor
chatters during
startup or during
operation. 1. Extension cord (if used) is causing
voltage drop.
1. Move machine closer to the power source or use a
larger gauge or shorter extension cord.
2. Phase converter (if used) wild wire
connected wrong.
2. Connect wild wire to the machine power supply
terminal that is not part of the contactor field coil
power supply circuit.
3. Power supply has incorrect voltage
on one or more legs.
3. Contact your power company to fix the power
supply.
Machine operates
in reverse. 1. Power connections wired out of
phase (SB1022 only).
1. Swap two power incoming power leads (see Page
47).
Troubleshooting