R06.0
16/05/2019
Page 15
5.
If the transport speed only increases when the screw is loosened and does not
decrease again even when the screw is fully loosened, the drive unit is too rigidly
tuned. In this case, remove a leaf spring and retune the frequency. You must re-
move as many leaf springs as necessary until the properties described in point 4)
are achieved. If you have to remove several leaf springs, they must be removed
as evenly as possible from the three spring assemblies on the bowl side.
6.
If the transport speed decreases immediately while the screw is being loosened,
the drive unit is tuned too softly. In this case, fit a leaf spring and retune the fre-
quency. You must add as many leaf springs as necessary until the properties de-
scribed in point 4) are achieved. If you have to add several leaf springs, they must
be added as evenly as possible to the three spring assemblies on the bowl side.
The fitted leaf springs must be clean and dry.
Only one spring assembly must be dismantled at a time. To tighten the screw after tuning
the bowl feeder, apply the appropriate installation tool
(see section
in order to prevent the bowl feeder from twisting. The spring assemblies connected to the
counter weight must not be loosened.
After you have adjusted the natural frequency, the magnet gap must be checked.This
can easily become maladjusted whilst you are fitting or removing springs. If this is the
case the magnet gap must be reset as described in section 5.2 Adjusting the magnet gap
