Patent ID: 6041683
Filing Date: 2000-03-28
Classification: A01G,B23D,B23Q,G05B,Y10T

Abstract:
An apparatus for adjusting feeding power of a cross-cutting saw of a mobile tree handling machine capable of moving in terrain, said apparatus comprising,an actuator connected to transmit power to said saw;a line connected between said actuator and a source of pressure medium for creating a pressure in said actuator and a feeding power of said saw from said actuator, said line comprising a means for adjusting the pressure in said actuator;a hydraulic motor rotating the cross-cutting saw at a rotational speed,a rotational speed sensor arranged to measure the rotational speed of said saw directly from said hydraulic motor;a computing means for comparing measured rotational speed of said saw with a pre-set value and for controlling said means for adjusting so that when said measured rotational speed exceeds said pre-set value said pressure in said actuator and said feeding power increases and when said measured rotational speed decreases below said pre-set value said pressure in said actuator and said feeding power decreases, whereby said rotational speed of said saw is maintained substantially constant; anda transmitting connection communication with said rotational speed sensor and said computing means.