20
11.2
Operational Problems
Symptom
Possible Cause
Correction
Cuts not square.
Blade not square to vise/material.
Adjust vise square to blade.
Blade surface not perpendicular to
table.
Adjust blade guides until perpendicular.
Workpiece shifting in vise.
Properly secure workpiece by tightening
vise handles. If irregular-shaped workpiece,
use appropriate clamping technique or jig.
Low blade tension.
Increase tension.
Blade guides out of adjustment.
Adjust blade guides.
Blade is worn, cutting crooked.
Replace blade.
Feed pressure too great.
Reduce feed pressure.
Blade guides incorrectly set.
Readjust guide assemblies.
Incorrect blade toothing in relation to
workpiece.
Check Machinery’s Handbook for
recommended blade type.
Miter cuts not accurate. Improper setting of vise jaws.
Use adjustable square or protractor to
verify angle settings.
Blade worn; cutting crooked.
Replace blade.
Premature dulling of
blade teeth
Improper blade break-in.
Follow proper break-in procedure.
Excessive blade speed, blade teeth
overheating.
Decrease speed.
Inadequate feed rate.
Adjust cylinder dial setting as needed.
Improper tooth pitch for material.
Use proper blade.
Hard spots or scale on material.
Scale: reduce speed and increase feed
rate. Hard Spots: increase feed rate.
Work hardening of material (especially
stainless steel).
Increase feed rate.
Blade installed backwards.
Remove blade and twist inside-out.
Insufficient blade tension.
Adjust as needed.
Finished surface of
workpiece is rough,
unsatisfactory.
Improper blade break-in.
Follow proper break-in procedure.
Improper speed or feed rate.
Adjust as needed.
Dull or damaged teeth.
Replace blade.
Poor weld on blade.
Replace or re-weld blade.
Incorrect choice of blade.
Check a machinist’s handbook for blade
recommendations.
Excessive blade
breakage.
Incorrect blade tension.
Adjust accordingly.
Incorrect blade speed or downfeed
rate.
Adjust accordingly.
Workpiece loose in vise.
Clamp workpiece securely.
Blade rubs on wheel shoulder.
Adjust blade tracking.
Teeth too coarse for material.
Use appropriate blade for material.
Teeth in contact with workpiece
before saw is started.
Blade must be running before contact with
workpiece.
Blade guides misaligned.
Adjust blade guides.
Blade too thick for wheel diameter.
Use thinner blade.
Cracking at weld; poor annealing of
blade.
Replace blade.
Summary of Contents for BHVBS-712B
Page 22: ...22 12 1 2 BHVBS 712B Bow Assembly Exploded View...
Page 27: ...27 13 0 Electrical Connections BHVBS 712B...
Page 29: ...29 NOTES...
Page 30: ...30 NOTES...
Page 31: ...31 NOTES...