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

1987-01-27

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

B41F 1314, B41F 3306

Patent

active

046387340

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 is operative for generating respective control signals for a right-hand end position, for a left-hand end position, for a right-hand switching point, and for a left-hand switching point. A resetting input of a counter incorporated in an incremental displacement measuring system is connected through a NOR-gate having inputs connected to those of the outputs of the evaluation circuit which carry the switching point control signals and through an AND-gate having inputs respectively connected to the NOR-gate output, to an input element for the zero position, and to an output of a pulse generator output which is also incorporated in the incremental displacement measuring system, to the evaluation circuit, while a counting input of the counter is directly connected to the output of the pulse generator.

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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