39
TROUBLE SHOOTING (Continued....)
2. Check for faulty stock: Heavy scale, inclusions,
hard spots, etc.
3. Stock analysis is incorrect. This can result in
an incorrect cutting recommendation.
4. Coolant is not covering the saw band properly.
5. Check for saw band vibration.
6. Check for chip welding, or a chipped blade tooth
lodged in the cut.
7. Saw band being used is incorrect.
8. Coolant mixture is too weak, or incorrect coolant is
being used.
9. The saw band is not properly tensioned.
10. Decrease feed pressure to "break in" a new saw
band on its rst few cuts.
BLADE TEETH STRIPPING
1. Increase band speed or decrease feed pressure.
2. Check for chip welding, or for a chipped blade tooth
lodged in the cut.
3. Faulty stock is being used: Check for heavy scale,
inclusions, hard spots, etc.
4. Check for a worn, or improperly adjusted band
brush.
5. Check for vibration caused by loose vise jaw clamping
against the stockpiece.
6. Check for worn saw guide inserts and/or carbide
back-up bearing.
7. Coolant is not being applied correctly.
8. Check for incorrect saw band tension being used.
9. Saw band pitch may be too coarse for thickness of
the stock section.
SAW BAND BREAKAGE
1. The saw band is being dropped into the stockpiece
due to incorrect saw head feeding rate.
2. Increase band speed being used and/or decrease
feed force.
3. Check for stock not being held rmly by the vise
jaws.
4. Check for incorrect adjustment of the saw guide
inserts and carbide back-up guides.
5. Check for insufcient coolant ow.
6. Use a ner pitch saw band.
7. Check for incorrect saw band tension.
SAW BAND IS NOT RUNNING TRUE AGAINST
THE SAW GUIDE BACK-UP BEARINGS (May
Cause Vibration)
1. Examine the carbide back-up bearings. Replace
them if they are chipped or worn more than 0.020-
inch (0.5 mm).
2. Have a DoALL service representative check machine
alignment.
3. Check for worn saw guide pivot bolts.
4. Left saw guide arm is loose, or not positioned close
enough to the stock.
INACCURATE CUT-OFF
1. Check for worn or dull blade teeth.
2. Check for a hard spot in stock being cut.
3. Band brush is not properly cleaning the blade
teeth.
4. Increase band speed being used and/or decrease
feed force.
5. Check for dirty coolant. Replace if necessary.
6. Check for crooked stock (this can result in straight,
but not square cuts).
7. Left saw guide arm is loose, or not positioned close
enough to the stock being cut.
8. Saw band pitch choice is incorrect.
9. Check for incorrect saw band tension.
10. Check for incorrect adjustment of inserts, back-up
bearing, or worn pivot bolts.
11. Check machine alignment. Have a DoALL service
representative check and/or adjust machine
alignment.
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