Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Patent
1982-11-12
1985-02-19
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
118682, 118684, 198341, 361159, H01H 4732
Patent
active
045009376
ABSTRACT:
A control circuit for a solenoid driver for a dispenser having inherent pull-in and drop-out delays. The circuit includes a tachometer that generates pulses representative of the speed of a conveyor that conveys a substrate upon which the dispenser dispenses fluid. A sensor generates a trigger signal indicating that the substrate is at a preselected location. Delay counter circuitry, enabled through the trigger signal, generates an enabling signal after receiving a preselected number of pulses. Duration counter circuitry, enabled by the enabling signal, generates an initial driving signal of a preselected signal duration. Compensator circuitry receives the initial driving signal and modifies it so as to compensate for the pull-in and drop-out delays so that fluid is deposited for the dispensing duration upon the substrate commencing at the preselected position.
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Eisenzopf Reinhard J.
Nordson Corporation
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