Arrangement for printing machine plate cylinder zero position ad

Details Arrangement for printing machine plate cylinder zero position ad Arrangement for printing machine plate cylinder zero position ad

1986-03-04

1987-01-13

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

B41F 1314, B41F 3306

Patent

active

046355464

ABSTRACT:
An arrangement for printing machine plate cylinder adjustment to zero position includes an evaluation circuit which is interposed between a potentiometer which issues an electrical signal representative of the instantaneous position of an adjustment transmission driven by a motor, and motor protection devices for the two senses of rotation of the motor. The evaluation circuit includes an A/D converter unit which is connected at its input side with the potentiometer and at its output side via at least one equivalence circuit and a flip-flop with respective AND-gates which are arranged ahead of the motor protection devices and are also connected at their inputs directly to an output of the A/D converter unit, and at least one additional AND-gate which is connected via at least one up-counter with the equivalence circuit. The arrangement further includes an incremental measuring system including a pulse generator having an output connected to a pulse AND-gate and to the further AND-gate, a counter having an input connected to the output of the pulse generator, and a resetting input connected to the output of said pulse AND-gate, and an indication and control device connected at its input side to the output sides of the counter and of the A/D converter unit.

REFERENCES:
patent: 3746957 (1973-07-01), Forster et al.
patent: 4243925 (1981-01-01), Gnechtel
patent: 4539907 (1985-09-01), Johne et al.
patent: 4552066 (1985-11-01), Giori et al.

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