Southbend SB1022, SB1021 manual Blade Selection section beginning on

For Machines Mfg. Since 8/09 T R O U B L E S H O O T I N G Model SB1021/SB1022

Symptom

Possible Cause

Possible Solution

Machine stalls	1.	Too much pressure when feeding	1.	Reduce pressure when feeding workpiece.
or slows when		workpiece.
operating.	2.	Motor is wired out of phase	2.	Swap two power incoming power leads (see Page
		(SB1022 only).		47).

3.Workpiece is warped and binding 3. Fabricate a jig for better workpiece control. blade.

4.Blade is not correct for material 4. Use the correct blade for the operation. Refer to

	being cut.		Blade Selection section beginning on Page 20.
5.	Belt(s) slipping.	5.	Tension/replace belt(s); ensure pulleys are aligned.
6.	Motor overheated.	6.	Let cool, clean motor, and reduce workload.
7.	Run capacitor at fault (SB1021	7.	Test/repair/replace.
	only).

8.Pulley or sprocket slipping on shaft. 8. Replace pulley and key or set screw. Replace shaft

if worn.

9.Motor connection wired incorrectly. 9. Review wiring diagram on motor cover; correct wire connections.

10.Contactor has poor contacts.10. Test all legs for power, test field coil and replace if

at fault.

11.Centrifugal switch at fault (SB1021 11. Adjust/replace centrifugal switch if available. only).

	12.	Motor at fault.	12.	Test for shorted windings, bad bearings and repair
				or replace.
Handwheel has	1.	Leadscrew is dirty or lacks proper	1.	Clean and lubricate the leadscrew (see Page 33).
excessive backlash,		lubrication.
endplay, binds, or	2.	Pinion gears out of adjustment.	2.	Re-adjust pinion gears to reduce backlash (see
is difficult to move.
				Page 37).

3.Bearing or leadscrew collar is worn 3. Replace bearing or readjust leadscrew collar (see

or loose. Page 37).

4.Linkage bolts, pins, and holes are 4. Replace linkage bolts, pins, and re-bush any worn

loose or worn. pin holes.

5.Leadscrew or leadscrew nut worn. 5. Replace leadscrew or leadscrew nut.

Cuts are not square	1.	Pointer or scale not calibrated or	1.	Zero table to blade and realign scale pointers (see
or the intended		loose table.		Page 35). Tighten any loose fasteners.
angle is incorrect.	2.	Table guide post is loose or out of	2.	Tighten any loose hardware or lock levers. Align the
		alignment.		guide post (see Page 36).
Grinder does not	1.	Wiring or ON/OFF switch at fault	1.	Repair wiring or replace grinder switch.
work.	2.	Motor at fault.	2.	Replace motor.
Work lamp or	1.	Bulb, wiring, or switch at fault.	1.	Replace bulb, repair wiring, replace switch.
welding lamp does	2.	Transformer is at fault.	2.	Replace transformer.
not work
Welder is	1.	Operator error.	1.	Use welder as outlined in operations section and
inoperative or				practice on scrap blades (see Page 28).
welds poorly.	2.	Wiring or welding switch at fault.	2.	Repair wiring or replace welding switch.
	3.	Welder transformer at fault.	3.	Replace welder transformer.

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