Troubleshooting
Mechanical or electrical problems
6
6-5 doc050624 Troubleshooting
The workpiece is fed poorly or
not at all through the machine.
1. The shear pin in the out-feed
roller is broken.
2. Wood debris and resin have
accumulated in the grooves of the
feed rollers and on the out-feed
roller.
3. The pressure of the feed rollers is
too low.
4. The vertical movement of the
feed rollers is obstructed by wood
debris that has got stuck in the verti-
cally movable bearing housings of
the feed rollers or in the springs
under these.
5. Wood debris has accumulated
around the upper cutter.
6. The machine table is covered
with resin or rust.
7. The sliding strips under the feed
rollers are defective.
8. One (or several) of the sprockets
in the chain transmission of the
feeder has come loose from the
shaft.
1. Remove the planetary gear and
replace the broken shear pin.
2. Clean the feed rollers.
3. Increase the feeding pressure and
make sure the feed rollers are balancing
horizontally over the workpiece.
4. Clean the bearing housings of the
feed rollers, especially check the mov-
able part of the bearing housing.
Remove wood debris that has got stuck
in the springs of the feed rollers.
5. Remove the wood debris and
increase the air flow in the chip extractor
of the upper cutter.
6. Clean and lubricate the table.
7. Replace the sliding strips and fasten
the new ones with double coated tape, if
necessary in several layers, so that the
the sliding strips are about 0.5 mm
above the surface of the machine table.
8. Check the locking screws of the
sprockets and tighten them against the
flat part of the shaft.
The upper cutter rotates a long
time after the machine has
been shut off (the deceleration
should be max. 10 seconds).
1. The fuse on the brake card has
blown.
2. The brake card is defective.
1. Replace the glass fuse on the card.
2. Replace the defective brake card. On
the new brake card there is a potentiom-
eter that has to be adjusted (about 1/4
turn from 0).
One of the motors will not start. 1. Defective contact.
2. Defective motor.
3. A cable to the contact or to the
motor is loose.
1. The electrical system may only be
opened by a qualified electrician:
Replace the defective contact.
2. The electrical system may only be
opened by a qualified electrician:
Replace the defective motor.
3. The electrical system may only be
opened by a qualified electrician: Ensure
that all cables are correctly connected.
Problem Possible Cause Remedy
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