18
9.6.6
Face frames and raised panel
doors
It is very important to have the proper abrasive
contact when doing this type of sanding. If the
machine is set to take an excessive depth of cut, the
result can be a gouge or dip as the drum goes from
sanding the rails at full width to sanding just a few
inches of width on the stiles. To prevent this make
sure, when using abrasives finer than 80 grit, that
the drum is in contact with the wood but can still be
spun by hand. If there is room, angling the stock on
the conveyor belt can also help.
Slowing the conveyor feed when coming to a rail in
the stock can help prevent a dip or gouge. This
allows the abrasive to work the wider width with less
effort, and to achieve better consistency of the
finished surface.
9.6.7
Stock feeding angle
Some pieces, because of their dimensions, will
need to be fed into the machine at a 90° angle
(perpendicular to drum). However, even a slight
offset angle of stock will provide for more effective
stock removal. The optimum feeding angle for stock
removal is about 60°.
Angling the workpiece for stock removal provides
other advantages, such as less loading of certain
areas of the drum due to glue lines or mineral
streaks in the stock, more even wear of abrasive
strips, potentially faster feed rates, and lighter loads
on the motor. Note that to get the best final finish,
however, the stock should be fed through the
machine so it will be sanded in line with the grain of
the wood on the final one or two passes.
10.0
User-maintenance
Before doing maintenance on
the machine, disconnect it from the electrical
supply (pull out the plug), unless indicated
otherwise. Failure to comply may cause serious
injury.
10.1
Cleaning and lubrication
For best results, make cleaning the sander a regular
shop procedure. Allowing excess build-up of dust
and debris can adversely affect performance
through loading of the abrasives, slippage on the
conveyor table, and/or the accumulation of material
inside the drums which can throw off the center of
balance.
NOTE: Bearings are pre-sealed and require no
lubrication.
Brush the conveyor belt after cleaning
operations. If not cleaned, the conveyor belt
could allow stock to slip during sanding
operations.
Lubricate conveyor bushings as needed, and
check for wear.
Lubricate elevating leadscrew (A, Figure 10-1)
as needed.
Clean sawdust from abrasive strip and brush
dust from conveyor belt.
Keep slide areas clean (B, Figure 10-1).
Blow dust from motors and switches.
Blow dust from inside of sanding drum, which
may cause vibration or offset the center of
balance. (Leave your dust collector on when
cleaning dust from the drums.)
Check all set screws for tightness on parts such
as bearings, conveyor table, and couplings.
Figure 10-1
10.2
Drum maintenance
The drum should not require removal from the
machine under normal circumstances. Should
maintenance ever become necessary, the drum has
been designed for easy removal and replacement.
1. Disconnect sander from power source/unplug.
2. Remove four socket head screws (C, Figure 10-
2).
3. Carefully lift out drum with coupling (D)
attached.
Figure 10-2: drum removal
