Troubleshooting Guide

 

 

Problem

 

 

 

Possible Cause

 

 

 

 

Solution

 

 

 

Conveyor belt does not

 

 

Shaft coupler is not attached.

 

 

 

Attach the shaft coupler.

 

 

 

move.

 

 

 

 

 

 

 

 

 

 

 

 

Conveyor rollers run

 

 

Shaft coupling is loose.

 

 

Align the shaft flats of the gear motor

 

 

 

 

 

 

 

 

 

 

and the drive roller and tighten the

 

 

 

intermittently.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

shaft-coupling setscrews.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Abrasive strip comes off

 

 

1.

Slack in abrasive strip on drum.

 

 

1.

Remove the slack in the strip.

 

 

 

 

 

2.

Abrasive improperly wrapped.

 

 

2.

Read the section on wrapping

 

 

 

drum.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

abrasive strips.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Strip caught on inside edge of

 

 

1.

Re-adjust the strip end in the slot

 

 

 

Abrasive strip is loose.

 

 

 

slot, or on inboard side of drum.

 

 

 

 

and/or trim the abrasive edge.

 

 

 

 

 

2.

Strip not cut properly.

 

 

2.

Re-cut and re-install the abrasive

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

strip.

 

 

 

 

 

 

 

1.

Excessive depth of cut.

 

 

1.

Reduce the depth of cut.

 

 

 

Abrasive loads up

 

 

2.

Excessive feed rate.

 

 

2.

Use a slower feed rate.

 

 

 

prematurely.

 

 

3.

Inadequate dust collection.

 

 

3.

Increase airflow at the dust ports.

 

 

 

 

 

 

 

4.

Inadequate abrasive.

 

 

4.

Use an open-coat abrasive.

 

 

 

Line or groove in stock.

 

 

1.

Inconsistent feed rate.

 

 

1.

Do not stop or change the feed

 

 

 

 

 

 

 

 

 

 

 

rate.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Abrasive strip is overlapped.

 

 

1.

Re-wrap the abrasive strip.

 

 

 

 

 

 

 

2.

Excessive depth of cut.

 

 

2.

Reduce the depth of cut.

 

 

 

 

 

 

 

3.

Excessive depth of cut for fine

 

 

3.

Use a coarser grit or reduce the

 

 

 

Wood burns.

 

 

 

grit.

 

 

 

 

depth of cut.

 

 

 

 

 

 

 

4.

Feed rate is too slow.

 

 

4.

Increase the feed rate.

 

 

 

 

 

 

 

5.

Abrasive is loaded.

 

 

5.

Clean the abrasives.

 

 

 

 

 

 

 

6.

Worn abrasives.

 

 

6.

Replace the abrasives.

 

 

 

Board slips on conveyor

 

 

1.

Tension rollers are too high.

 

 

1.

Lower the tension rollers.

 

 

 

 

 

2.

Excessive feed rate.

 

 

2.

Reduce the feed rate.

 

 

 

belt.

 

 

 

 

 

 

 

 

 

3.

Dirty or worn conveyor belt.

 

 

3.

Replace the conveyor belt.

 

 

 

 

 

 

 

 

 

 

 

 

Sander motor slows or

 

 

1.

Improper conveyor belt tension.

 

 

1.

Adjust the belt tension.

 

 

 

 

 

2.

Excessive depth of cut.

 

 

2.

Reduce the depth of cut.

 

 

 

stalls

 

 

 

 

 

 

 

 

 

3.

Excessive feed rate.

 

 

3.

Reduce the feed rate.

 

 

 

 

 

 

 

 

 

 

 

 

Rippled sanded surface

 

 

 

 

 

 

 

A1. Conveyor belt slipping, see

 

 

 

A.

Non-uniformly

 

 

A.

Uneven feed rate.

 

 

 

 

above.

 

 

 

 

spaced ripples.

 

 

 

 

 

 

 

A2. Board slips on conveyor, see

 

 

 

 

 

 

 

 

 

 

 

 

 

above.

 

 

 

 

 

 

 

 

 

 

 

 

A3. Power feed gear motor stalls,

 

 

 

 

 

 

 

 

 

 

 

 

 

see above.

 

 

 

B.

Uniformly spaced

 

 

B.

Conveyor bed flexing or

 

 

 

B1. Reduce the depth of cut.

 

 

 

 

ripples.

 

 

 

vibration.

 

 

 

B2. Reduce the feed rate.

 

 

 

 

 

 

 

 

 

 

 

 

B3. Check for loose bolts, shaft-

 

 

 

 

 

 

 

 

 

 

 

 

 

coupling setscrews or out of

 

 

 

 

 

 

 

 

 

 

 

 

 

balance drum.

 

 

 

 

 

 

 

1.

Inconsistent feed rate.

 

 

1.

Maintain constant feed rate (by

 

 

 

 

 

 

 

 

 

 

 

 

 

hand).

 

 

 

 

 

 

 

2.

Stock slipping on conveyor.

 

 

2.

Excessive depth of cut

 

 

 

Gouging of the wood.

 

 

 

 

 

 

 

 

(PowerFeed) or inadequate hold

 

 

 

 

 

 

 

 

 

 

 

 

 

down pressure.

 

 

 

 

 

 

 

3.

Work piece not properly

 

 

3.

Add work supports for long work

 

 

 

 

 

 

 

 

supported.

 

 

 

 

pieces.

 

 

 

Snipes

 

 

1.

Improper tension on rollers

 

 

1.

See tension roller adjustment.

 

 

 

 

 

 

 

1.

Excessive load on sanding drum

 

 

1.

Allow motor to cool and reset

 

 

 

Motor overload

 

 

 

and motor.

 

 

 

 

overload button.

 

 

 

 

 

2.

Too many tools on circuit.

 

 

2.

Have a certified electrician

 

 

 

protector trips or shop

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

correct the shop-wiring problem.

 

 

 

wiring breaker trips.

 

 

 

 

 

 

 

 

 

 

 

 

 

3.

Excessive length or inadequate

 

 

3.

Use a shorter, heavier gauge

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

size extension cord.

 

 

 

 

extension cord.

 

 

 

 

 

 

 

 

19

 

 

 

 

 

 

 

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Image 19
Jet Tools M-628900 operating instructions Troubleshooting Guide, Problem Possible Cause Solution
Page 18 Page 20

M-628900 specifications

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