Screening machine with acceleration-constant control

Details Screening machine with acceleration-constant control Screening machine with acceleration-constant control

1996-06-28

1998-08-11

Terrell, William E.

Classifying, separating, and assorting solids

Sifting

Elements

2093653, 209366, B07B 142

Patent

active

057914940

ABSTRACT:
In a screening machine with a three-dimensional oscillating screening movement and a control unit for converting a given vibration level into the required energy supply for the electromagnet, the results of screening analyses are to be reproducible or comparable; to this end it is provided that the control unit (26) is designed for calculating the machine acceleration as a function of the respective determined vibration level and the simultaneously determined frequency value as a control value for the energy supply to the electromagnet and for the setpoint-actual value comparison of the calculated machine acceleration actual value with a given machine acceleration setpoint value and for compensating a determined machine acceleration deviation by adjusting the energy supply to the electromagnet (21) on the basis of the change in the vibration level calculated as a function of the given frequency.

REFERENCES:
patent: 3158256 (1964-11-01), Torrey et al.
patent: 3650401 (1972-03-01), Riesbeck et al.

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