Method of positioning a moving part and a printer operating in a

Details Method of positioning a moving part and a printer operating in a Method of positioning a moving part and a printer operating in a

1979-11-19

1981-03-31

Eickholt, E. H.

Printing

Selective or progressive

Bed and platen machines

4001545, 101 9319, 318685, 318603, 318696, B41J 122, B41J 900

Patent

active

042586224

ABSTRACT:
The invention comes within the field of equipment control. A method of shifting a moving unit from a first position to a second position by means of a stepping motor driven by a finite sequence of pulses, said moving unit being liable to oscillate about its equilibrium point, characterized in that as a function of the period and of the damping factor of the oscillation, the time intervals which separate said pulses are chosen so that the last pulse is applied to the motor at an instant when the oscillation resulting from the set of preceding pulses brings the moving unit substantially to the required final position and reduces its speed substantially to zero. It applies in particular to disc-type printers.

REFERENCES:
patent: 3573589 (1971-04-01), Berry
patent: 3586953 (1971-06-01), Markkanen et al.
patent: 3588661 (1971-06-01), Newell
patent: 3864615 (1975-02-01), Williams
patent: 4025837 (1977-05-01), Meier et al.
patent: 4074179 (1978-02-01), Kuo
patent: 4115726 (1978-09-01), Patterson et al.
patent: 4131840 (1978-12-01), Wiesner
patent: 4142140 (1979-02-01), Wiesner
patent: 4145643 (1979-03-01), Maeda et al.
patent: 4215302 (1980-07-01), Chiang
"Delayed Closed-Loop Scheme for Stepping Motor Control" Bechtle, IBM Journal of Research & Development, vol. 20, No. 3, pp. 235-243, May 1976.

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