Automatic mechanical resonant frequency detector and driver for

Details Automatic mechanical resonant frequency detector and driver for Automatic mechanical resonant frequency detector and driver for

1983-09-13

1987-01-20

Wright, Jr., Ernest T.

Printing

Selective or progressive

Bed and platen machines

400124, B41J 302

Patent

active

046373071

ABSTRACT:
The detected phase difference between a sensed motion velocity signal and an electric motor driving signal is used to drive a phase-locked loop which automatically generates a sinusoidal reference signal having a frequency substantially equal to the instantaneous natural mechanical resonant frequency of the driven mechanism. The sinusoidal reference signal is then combined with the sensed velocity feedback signal to generate the motor driving signal required to maintian resonant driving conditions. Low frequency compensation is also provided in the velocity control loop. The sinusoidal velocity reference signal is initially generated in digital form by counting clock signals which are caused to occur at a rate corresponding to the desired frequency of the sinusoidal reference signal.

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Hewlett-Packard Journal, Nov. 1978, "Optimizing the Performance of an Electromechanical Print Mechanism", Baily et al., pp. 23-31.

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