37
Problem Possible Cause Remedy
Rumbling or vibration in the upper or the
lower cutter.
1. The moulding knives are incorrectly
mounted.
2. The moulding knives or the planing
knives are incorrectly ground.
3. The bearing is defect. This can
be due to wood debris that has
accumulated on the back of the
bearing housing, which leads to
overheating.
4. The belt transmission is defect.
1. Clean the cutter and mount the
knives and the chip breakers
correctly. Identical knives should
be mounted on opposite sides of
the cutter without any, or with only
slightly horizontal deviation.
2. Grind the knives in pairs so that they
are identical on opposite sides of the
cutter.
3. Clean the bearing housing and
replace the ball bearing.
4. Clean the belt pulleys and replace
the Poly V belt.
It is difcult to adjust the height of the
machine table.
1. The trapezoidal thread bars, on
which the table is suspended, are
dirty and not lubricated.
2. Faulty chain transmission.
3. The machine has been subject to
impact which has spoiled the setting
of the table.
1. Clean and lubricate the trapezoidal
thread bars with oil.
2. Make sure that the chain runs cor-
rectly on the sprockets. Clean and
lubricate the chain.
3. Adjust the table. (See Levelling the
machine table p.22.)
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