22
Symptom
Possible Cause
Correction *
Line or groove in stock.
Inconsistent feed rate.
Do not stop or change the feed rate while
feeding stock.
Snipe marks.
Improper tension on rollers.
Re-tension rollers.
Sander burns wood.
Abrasive strip is overlapped.
Re-wrap abrasive strip.
Abrasive is loaded.
Clean abrasive.
Depth of cut excessive for fine grit.
Use coarser grit or reduce depth of cut.
Feed rate too slow.
Increase feed rate.
Abrasive is worn.
Replace abrasive.
Board slips on conveyor
belt.
Tension rollers too high.
Lower tension rollers.
Excessive feed rate.
Reduce feed rate.
Dirty or worn conveyor belt.
Replace conveyor belt.
Ripples in sanded
surface.
A. Non-uniformly spaced
ripples.
B. Uniformly spaced
ripples.
A. Uneven feed rate.
Conveyor belt slipping (see above)
Board slips on conveyor belt (see above).
Conveyor motor stalls (see above).
B. Conveyor table flexing or vibration. Reduce depth of cut and/or feed rate. Check
for loose bolts, loose shaft coupling set
screws, or out-of-balance drum.
Wood is gouged.
Stock slipping on conveyor.
Correct depth of cut or roller tension.
Work piece not properly supported.
Add work supports for long work pieces.
*
WARNING:
Some corrections may require a qualified electrician.
Table 3
