Shock preventer for machines with hydraulic and/or pneumatic drives

摘要

The shock preventer is applicable to a machine carrying out its mechanical task by hydraulic and/or pneumatic pressure and using a valve (50a,50b) to control the flow of oil and/or air to the drive. The original command signal for the drive is in the form of a rectangular wave transformed in a low pass filter. A control (40) provides piston (62a,62b) stroke data as well as an initial command signal. A low-pass filtered command signal is generated for the drive in conformity with the stroke data and initial command signal for the drive. A return is made to the first step.