Electronic postage meter having microcomputer-controlled motor-p

Details Electronic postage meter having microcomputer-controlled motor-p Electronic postage meter having microcomputer-controlled motor-p

1991-10-24

1994-08-30

Shoop, Jr., William M.

Electricity: motive power systems

Open-loop stepping motor control systems

318685, H02P 800

Patent

active

053431332

ABSTRACT:
A postage meter comprises a non-volatile memory and a microcomputer in communication with the non-volatile memory. The microcomputer is operatively coupled to a stepper motor. The stepper motor includes a rotor and is arranged for positioning at least one printwheel of the postage meter. The non-volatile memory has stored therein a value corresponding to a predetermined pulse width required for pulsing a coil of the stepper motor to position the rotor to a final position between step positions. The microcomputer pulses the stepper motor coil with a pulse of the predetermined pulse with for bring the stepper motor rotor to a final position for positioning the printwheel.

REFERENCES:
patent: 4519048 (1985-05-01), Abellana et al.
patent: 4745346 (1988-05-01), Muller

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