Heidelberger Druckmaschinen Ag

Karl-Heinz May

Dieter Hauck

Hans Muller

Anton Rodi

Jurgen Rehberger

Udo Blasius

Jurgen Reithofer

Monitoring system for an electronic digital system. It includes an electronic digital control unit, a plurality of peripheral units, a bus system, the various system parts, and further an output circuit connected to the control unit. It further includes an output stage circuit with inputs connected to the output circuit, and outputs transmitting signals to the peripheral units for interrogating fault conditions therein, an interrupt trigger circuit with outputs connected to the control unit, and a digital filter connected between the monitoring system and the peripheral units for filtering out noise signals from the peripheral units.

System for inputting and/or outputting signals of a digital control

Method of determining the rotational speed of a machine having a drive into which a setpoint value for the rotational speed has been introduced and a rotational-speed sensor from which a measured actual value is obtainable, which comprises feeding the setpoint value to a mathematical model of a controlled system formed by the drive and the machine, deriving from the output of the mathematical model a computed actual value, determining the difference between the measured actual value and the computed actual value, forming the absolute value of the difference, and, if the absolute amount of the difference is exceeded, passing on the computed actual value, and if the absolute amount of the difference is not exceeded, passing on the measured actual value; and device for performing the method as the determined rotational speed of the machine.

Method of determining the rotational speed of a machine, and device for

Method of monitoring a clock signal includes bringing a bistable element to a first state through pulses of the clock signal and, upon the occurrence of pulses of a reference signal having a frequency lower than the frequency of the clock signal, scanning the state of the bistable element and outputting it as an output signal, and subsequently setting the bistable element to a second state.

Device for monitoring a clock signal

Data entry and display apparatus for a printing machine having a plurality of control elements having actual and desired position values for controlling machine variables which include ink and dampening fluid density and register positions, the control apparatus includes a control panel having a plurality of optical first elements for displaying and controlling at least one of the machine variables; a light pen having a contact point which includes a second optical element for operatively, optically engaging the first optical elements; timing means operatively engaging the first and second optical element for timingly coordinating the position of the contact point in spaced relationship with the first optical elements for entering nominal position values for at least one of the control elements into the control apparatus.

Electronic device for controlling a printing machine

A method and device for evaluating signals of an incremental pulse generator for generating at least two mutually phase-shifted angular speed signals includes counting the angular speed signals only if a permissible combination of the angular speed signals is present.

Method and device for evaluating signals of an incremental pulse

A coding device for an electric cable plug connection having a plug connected to wires of a cable and insertable into a socket, both the plug and the socket being formed with a plurality of contacts, has a coding arrangement for assigning the plug to the socket in a correctly oriented position. The coding arrangement includes at least one jumper link connecting various of the contacts of the socket. The jumper link forms together with the cable connection an electrically interrogatable test loop.

Plug connector coding system for electric cables

A printing press, in particular an offset printing press comprising a plurality of individually operable setting motors, in particular for adjusting the inkfilm density profile, each setting motor being connected to a pick-up generating electric signals characteristic of the actual position of the setting motor at any given moment (actual values) comprises an electronic comparator arrangement (35, 44) which is supplied with the actual values and, in addition, desired values for the position of the individual setting motors (9) and which repeatedly scans the actual values sequentially in a cyclical time sequence and compares each actual value with the related desired value to form a setting signal for operation of the associated setting motor in the forward or reverse direction when a given positive or negative minimum deviation is exceeded. The setting signals are fed to a switching arrangement (52) designed to cause the respective setting motor to be stopped or driven at a pre-determined speed in the sense of rotation determined by the last setting signal until the next signal is received. Thus it is rendered possible to easily control a plurality of setting motors.

Growing community of inventors

Viernheim, Germany

Karl-Heinz May