Controllable movement method for machine platform of processing machine involves controlling electromagnetically actuated valve depending change in pivoting motor speed

摘要

The method involves determining whether the revolution rate of a pivoting motor, that moves the platform and is mounted on the machine, is varying, controlling an electromagnetically actuated valve depending on whether the motor speed is changing. Valve is configured to produce a relief valve pilot control signal in response, feeding a relief valve pilot control signal into a two-way relief valve to change it over accordingly and switching on a high pressure bypass valve or a low pressure bypass valve selected by changing over the relief valve. An Independent claim is also included for a working machine with an electrohydraulic system.