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The feed
conveyor
belt stops
or chatters.
The conveyor belt tension is incorrect.
The conveyor belt tracking is incorrect.
Adjust the conveyor belt tension.
Adjust the conveyor belt tracking.
The sanded
surface is
glazed and
shiny.
The sandpaper is worn out.
The drums are only applying light pressure
against the sanded surface.
Replace the sandpaper.
Increase the sanding pressure on the workpiece
surface.
Long grooves
or high spots
on sanded
surface.
The sandpaper is damaged or uneven-bald wear
in certain areas.
Replace the sandpaper.
Remove and rewrap the sandpaper on the drums.
The wood
slips on the
feed
conveyor
belt.
The feed conveyor belt is slippery with sawdust
or the surface is worn.
Too much material is being removed in one
pass.
Clean or replace the feed conveyor belt.
Reduce the sanding load, and adjust the drums
and pressure rollers.
The left and
right edges
on wood are
rounded.
The drums are applying too much sanding force
on the workpiece and the free edges of the
sandpaper are rolling over the edges.
Reduce the force the drums are applying on
the workpiece surface.
The wood
thickness is
uneven
from
side-to-
side.
The drums are not square to the table.
The sandpaper is worn or clogged unevenly
from side-to-side.
Adjust the drums and pressure rollers.
Clean or replace the sandpaper.
Snipe is
evident on
the ends of
the wood.
Lack of outfeed or infeed support is causing the
snipe.
The drum height and the pressure roller
spring tension are incorrect.
Use roller tables and support the infeed and
outfeed of the workpiece.
Adjust the drums and pressure rollers.
The
sandpaper
clogs too
quickly.
The sandpaper grit is too fine or is worn out.
Too much wood is being removed at once.
The wood is wet, oily, or dirty.
The dust collection system is insufficient.
Replace the sandpaper.
Reduce the load on the sanding drums.
Sand only dry and clean wood.
Service the dust collection system or increase
the duct collector
system efficiently.
The
sandpaper
tears.
The drums are not sanding parallel to direction
of conveyor belt feed.
Drums are not square with the table.
Sandpaper edges have overlapped or tape
has slipped.
Too much wood is being removed at once.
Adjust the drums and pressure rollers.
Adjust the drums and pressure rollers.
Wrap sandpaper on drums correctly and use a
heavy-duty tape.
Reduce the load on the sanding drums.
The sandpaper is unevenly crushed into the
hook-and-loop wrapping on the drums.
Troubleshooting
(Continued)
OPERATION