6
Don’t machine stock that is heavily
twisted, bowed, or otherwise varies in
thickness form end to end.
Workpieces shorter than 230 mm may
not be processed.
Machine max. 2 workpieces at one
time. Feed on both drum ends.
Only process multiple pieces of same
thickness. If there is a thickness
difference, the thinner pieces may slip
on the conveyor belt if they do not
contact the pressure rollers.
Support long workpieces with helping
roller stands.
Basic operating procedures:
1. Set depth of cut
2. Start drums
3. Engage conveyor (select
federate 1 or 2).
4. Start dust collector
5. Feed stock through unit
Switch machine off if no further
sanding is to be done immediately
afterwards.
General warning:
Always keep your fingers well clear
of the rotating sanding drums.
Never place your fingers near
machine cabinet infeed opening
and conveyor belt.
Operating notes:
First begin sanding with a coarser grit,
and then progressively work toward
finer grits (see chapter 7.2).
Grits that are too fine may sometimes
burnish the wood (oak, for example is
susceptible due to its open pores).
Angling the workpiece (Fig 4) provides
the advantage of more even wear of
abrasive strips, potential faster feed
rates, lighter load on the motors and
less dust build up on the sanding
paper.
Fig 4
Even a slight offset angle of the stock
will provide for more efficient stock
removal.
The optimum feeding angle for stock
removal is about 60°
You will get the best finish however,
when sanding in line with the grain of
the wood on the final one or two
passes.
You get a faster stock removal when
sanding several passes with less
depth of cut at a higher feedrate.
For best results clean the sanding
paper regularly (see chapter 7.4).
Abrasive life can also be increased by
reversing the strip.
Replace worn or torn sanding paper
immediately.
It may take some experimentation to
determine the proper depth of cut,
given the variables of abrasive grit,
type of wood and feed rate.
If a workpiece gets stuck lower the
conveyor.
In case of machine overload the motor
overload cut-off will react.
After appr.10 min of cooling the
machine can be started again.
A limit plate (U, Fig 5) is mounted to
the front of the sander. If the conveyor
table has been set too high, the
workpiece will contact this plate and a
limit switch will shut off the machine.
Fig 5
7. Setup and adjustments
General note:
Setup and adjustment work may
only be carried out after the
machine is protected against
accidental starting by locking the
mains switch in Off-position.
7.1 Wrapping abrasive strips
Disconnect the machine from the
power source (lock mains switch in
Off-position).
Open the hood by removing the
handwheel and turning the two locking
handles at the front counterclockwise
Always place the coarser grit on
the front drum.
Remove the socket head cap screw
and locking wedge (P, Fig 6) from
both ends of the drum.
NOTE: If the wedge sticks, use a flat
head screwdriver as leverage to free
it.
Begin at the right end of the drum.
Insert the abrasive strip and place the
locking wedge into the recess and
tighten firmly.
Fig 6
Wrap the strip around the drum, being
careful not to overlap the windings.
Fig 7
The take up fastener on the left end of
the drum is an independent piece (Q,
Fig 8). The take-up fastener is spring
tensioned to automatically take up any
slack caused by stretching of the
abrasive strip.
Rotate this fastener backward.
Insert the abrasive strip and place the
locking wedge into the recess and
tighten firmly.
