VARIABLE ADJUSTING DEVICE

• Main Author: MASUSE HIDEO
• Format: Patent
• Language: English
• Published: 09.10.1987
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; LIGHTING; MEASURING; MECHANICAL ENGINEERING; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TAPS; TESTING; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

PURPOSE:To easily execute a fine adjustment in the vicinity of a zero point by making the ratio of an output to the operating quantity of an adjusting operating part, small in the vicinity of the zero point and large at other parts. CONSTITUTION:At an adjusting device D, between a potentiometer 3 to interlock with an adjusting knob 1 which is an operating part and a servo amplifier 5 to switching-operate a servo valve 7, a converting circuit 10 is fitted. The signal converted and outputted by the circuit 10 comes to be nonlinear and the flow quantity of the oil adjusted by the valve 7 is also changed in accordance with the characteristic curve. Namely, in the vicinity of a zero point, even when the operating quantity of the knob 1 is large, the change of the flow quantity is fine and at other part, the quantity is largely changed in accordance with the operating quantity of the knob 1. For such a reason, the fine adjustment in the vicinity of a holding position comes to be easier than the conventional device.