-70-
For Machines Mfd. Since 7/21
South Bend Tools
Model SB1123
TROUBLESHOOTING
Operating Machine (Cont.)
Finished
workpieces are
rough or show
scoring.
1.
Blade is overloaded and twists.
1.
Decrease feed rate; ensure proper TPI (Page 38).
2.
Blade TPI is too coarse.
2.
Use correct blade for material and speed of cut
(Page 38).
3.
Blade is loose and fluttering.
3.
Adjust blade tension as required (Page 27).
4.
Blade tracking is incorrect.
4.
Adjust blade tracking (Page 28).
5.
Blade has missing/bent teeth, or
faulty weld.
5.
Replace blade (Page 43).
Symptom
Possible Cause
Possible Solution
Table is hard to
tilt.
1.
Table tilt lock lever is engaged.
1.
Disengage table tilt lock lever (Page 44).
2.
Sawdust or pitch trapped between
trunnion and base.
2.
Remove table and clean trunnion sliding surfaces
free of sawdust or pitch.
3.
Metal burrs on trunnion.
3.
Remove burrs.
Table does not tilt
to 45 or 0 degrees.
1.
Table tilt scale pointer not
calibrated.
1.
Calibrate table tilt scale pointer (Page 66).
2.
Positive stop not set correctly.
2.
Adjust positive stop (Page 44).
Blade tracks
incorrectly or
comes off wheels.
1.
Tracking is not adjusted properly.
1.
Adjust tracking (Page 28).
2.
Wheels are not coplanar.
2.
Adjust wheels to be coplanar (Page 63).
3.
Blade tension too loose.
3.
Increase blade tension (Page 27).
4.
Blade guides/support bearings
improperly adjusted.
4.
Properly adjust blade guides/support bearings
(Page 28).
5.
Feeding workpiece too fast.
5.
Feed workpiece slower.
6.
Incorrect blade for operation.
6.
Install correct blade (Page 38).
7.
Blade is bell-mouthed, worn, or
dull.
7.
Install new blade and remove tension from blade
when not in use.
8.
Wheel is damaged or worn.
8.
Replace wheel.
Cut is crooked or
blade wanders
(blade lead).
1.
Excessive feed rate/pressure.
1.
Reduce feed rate/pressure.
2.
Blade tension too loose.
2.
Increase blade tension (Page 27).
3.
Blade is too narrow or tooth type/
TPI is incorrect for the cut.
3.
Use wider blade. Ensure tooth type and TPI are
correct (Page 38).
4.
Inadequate blade support.
4.
Position upper blade guides to just clear workpiece.
Properly adjust blade guides/support bearings
(Page 28).
5.
Blade dull or has damaged tooth
set from improper guides/support
bearing adjustment.
5.
Replace blade (Page 43).
6.
Blade tracking is incorrect.
6.
Adjust blade tracking (Page 28).
7.
Table is loose.
7.
Tighten table trunnion mounting bolts or tilt lock
lever (Page 44).
8.
Fence or miter slot out of alignment
with blade.
8.
Align miter slot and fence with blade (Page 35).
9.
Blade guides/support bearings
improperly adjusted.
9.
Properly adjust blade guides/support bearings
(Page 32).
10.
Tooth set is uneven or teeth are
sharper on one side than the other.
10.
Replace blade (Page 43).
