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Controller combination in which the setpoint Q for the flow rate controller and the setpoint p for the pressure controller are pre-defined electrically on proportional valves. In this way the performa

Feedback control system for adapting the programmed machining process on machine tools with the objective of safeguarding and optimising the process. It is characteristic that fluctuations in process

The expression states that, e.g., with a 10-μm absolute filter no glass beads with a 10-μm diameter are allowed to pass through the filter. The expression should therefore only be used in conjunction

Directional valve with a control piston (control spool) moved by an electrical stepper motor via a spindle-nut system. In doing so, each angle of the stepper motor is matched with a position of the co

Time span that starts when the value for the controlled variable after a step in the disturbance variable or the reference variable leaves a pre-defined tolerance range and that ends when it enters th

The positive displacement principle states that the space required to generate a flow rate during a function period is geometrically reduced (pressure period) and increased again (suction period). The

Pressure difference between the working openings at a management or . It is referred to as positive if the inlet pressure is higher than the return line pressure. With synchronizing cylinders , the lo

If water enters hydraulic oil (e.g. condensation or through an external contamination), this has unwanted consequences as it accelerates the ageing of the oil, increases the corrosion of metallic surf

Collective term for all measures, procedures and devices, which are required to use given input signals to obtain the necessary for the process by way of suitable signal processing . This applies to t