Vending machine control with product delivery motor home detecti

Details Vending machine control with product delivery motor home detecti Vending machine control with product delivery motor home detecti

1987-03-02

1988-11-22

Rolla, Joseph J.

Check-actuated control mechanisms

With means responsive to malfunction

221 21, 221129, 318490, G07F 902

Patent

active

047859270

ABSTRACT:
A vending machine control apparatus has a product delivery motor home circuit and a DC power supply modulated in response to varying line voltage and/or load by a pulse width modulation circuit. The modulated DC power signal supplies power to one or more DC product delivery motors in a vending machine. Each product delivery motor has an associated switch which passes pulses, resulting from the modulation of the power supply, when the delivery motor is in its home position. A simple motor home detection circuit detects these pulses, and preferably a microprocessor control circuit connected to the detection circuit determines that a home condition exists.

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