| 摘要 |
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. |
