Controlling the Device
31
Movement of the sieve stack at the beginning of the sieving process
Insufficient clamping of the sieve stack
During the sieving process, the sieve stack can rotate and move over the
sieve plate.
The amplitude regulation cannot find a stable oscillating system, which
leads to fluctuating amplitude values.
• Observe the sieve stack at the beginning of the sieving process.
• If a movement of the sieve stack can be noticed, pause the sieving
process and retighten the sieve stack again.
7.5.1 Amplitudes in Dependence on the Load
The AS 200 control is a resonance sieving machine whose attainable amplitude is depending
on the load. In this respect, the mass (sieve stack and sieve clamping unit) fixed to the sieve
plate (ST) plays a primary role.
Only the amplitudes specified within the following load diagram can be achieved. The diagram
is to be seen as a guideline for the voltage rated on the type plate (M). Mains voltage
fluctuations or mains voltage deviations lead to increased tolerances.
Fig. 11: Load diagram for the sieve clamping units "economy", "standard" and "comfort"
The diagram illustrates the amplitude "A" in millimetre in dependence of the load "g" (sieve
stack mass) in gramme. The tolerance of the sieve stack mass amounts ± 5 %. To increase the
load at a too low sieve stack mass and hence to reach the maximum amplitude, an add-on
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