Powermatic DDS-237, DDS-225 Maintenance Checklist, Troubleshooting, Performance Problems

Maintenance Checklist

Note: See also the Maintenance section on page 15.

ˆWork area around machine marked off clearly.

ˆNon-skid floor strips in area where operator normally stands.

ˆInspect entire machine for loose bolts, nuts, screws. Tighten and replace as necessary.

ˆClean conveyor and drum areas, removing sawdust and chips with compressed air or a

ˆsoft bristle brush. Remove gum and pitch from metal areas with oven cleaner.

ˆLubricate chain and check tension.

ˆCheck belt condition - replace as needed. Dress with paraffin. Check belt tension.

ˆCheck motor for loose wiring and sawdust congestion.

ˆPulleys tight and in line.

ˆCheck bearings. Replace any bad or suspect bearings immediately.

Troubleshooting

Performance Problems

Problem

Abrasive belt glazes

Work burns

Abrasive belt burns, clogs quickly

Excessive abrasive belt replacement

Sanding marks on workpiece

Poor sanding quality

A slight taper across the sanded face of the workpiece

Conveyor table hard to move, or tends to bind on the leadscrews

Possible Cause	Solution
Wood is wet or gummy	No cure. Use different stock
Wrong grit	Use coarser grit for stock removal
Biting too deep	Adjust for slight sanding action and
	make repeated passes
Biting too deep	Reduce cut and make multiple passes
Abrasive belt too coarse for finish	Use proper grit for finish sanding
required
Sanding across the grain	When surface sanding, use very fine
	abrasive belt then finish by hand,
	working in direction of grain.
Abrasive belts worn	Replace abrasive belts
Abrasive belts not tight on drum	Re-wrap and properly tighten
	abrasive belts.
Height of rear drum has not been	Make drum setting equal both ends
adjusted evenly on both ends
Conveyor table not parallel to drums	Correct table parallelism
Leadscrews not greased	Lubricate leadscrews
Table not parallel	Correct table parallelism

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