Maintenance Procedures; Routine Inspection; Lubrication; Cleaning The Sanding Belts - Delta 31-481 Manuel D'utilisation

RECOMMENdEd MAINTENANCE PROCEdURES

ROUTINE INSPECTION

It is recommended that you periodically inspect your
®
DELTA Dual Drum Sander as a precautionary action.
During this time, check all hardware such as bolts,
nuts and screws to ensure they are properly tightened.
Also verify that the sanding belts and drive belts are
mounted properly and have not become loose or torn.
Also take this opportunity to inspect for dust and/or
wood particles that may have accumulated on or in the
machine.

LUBRICATION

The table height adjustment screw shafts, located at
either end of the machine must be well lubricated with
grease at all times. In order to access, inspect and
lubricate the screw shafts, it is necessary to remove
the two side guards located on either end of the
machine.
To remove the side guards:
1. Remove the elevation cursor by unscrewing the
retaining screw.
2. Remove the eight Phillips head bolts and washers
securing the left and right side guards to the
machine and remove the guards. See Fig. 14.
PROBLEM
Sanding surface clogs too
quickly.
Sanding belt tears.
Rounding on the edges.
Uneven thickness on right
and left side of the board.
Stock slips on the feed
belt.
Shiny spots on sanded
surface.
Marks on sanded surface
Feed belt does not
run smoothly or stops
completely.
Consistently noticeable
"snipe"
TROUBLEShOOTINg gUIdE
POTENTIAL CAUSE
Sanding grit too fine.
Too much material being removed at once.
Dirty board surface.
Insufficient dust collection.
Board contains too much moisture.
Worn sanding belt.
Drums not parallel to feed table.
Sandpaper edges overlapped.
Tape is slipping.
Too much material is removed at once.
Too much material is removed at once.
Drums are not parallel to feed table.
Uneven wear of sanding paper.
Too much material is removed at once.
Too much dust on the feed belt surface.
Worn feed belt.
Sanding paper too old.
Drums too high.
Partial damage to sanding paper.
Paper overlapped on edges.
Feed belt tension is incorrect.
Belt tracking is incorrect.
No out-feed support.
Pressure roller spring tension incorrect.
Drum height incorrect in relation to pressure rollers.
3. Re-attach side guards and elevation cursor.

CLEANINg ThE SANdINg BELTS

Regularly clean the sanding belts on the drums with
commercially available cleaning sticks, following the
manufacturer's directions. When cleaning, also brush
the stick crumbs from the sanding drum while it is still
rotating.
SOLUTION
Change to a coarser grit.
Adjust table height.
Ensure board is free of debris prior to sanding.
Inspect dust collection system.
Properly dry stock before sanding.
Replace sanding belt (Page 9)
Re-align drums (Page 11)
Re-install sanding belt.
Rewind the loose belt on the drum.
Lower the table height.
Lower the table height.
Re-align drums (Page 11)
Replace sanding belt.
Lower the table height.
Clean surface with air hose.
Replace feed belt (Page 9)
Replace sanding belt (Page 9)
Lower table height.
Replace sanding belt (Page 9)
Re-align sanding belt on drum
Adjust feed belt tension (Page 9)
Adjust feed tracking (Page 9)
Use supplementary support in rear of
machine.
Check and adjust.
Adjust pressure rollers (Page 12)
15
FIg. 14