PURPOSE: To enable continuous and smooth control of the title cylinder by supplying high frequency, to the second and third electromagnetic valves, composing one cycle in a time shorter than the on-off response time of an electromagnetic valve.
CONSTITUTION: To the first electromagnetic valve 3 are applied ON, OFF signals from a driving circuit 203, and to the second and the third electromagnetic valves 4, 5 are applied high frequencies each of which composes one cycle in a time shorter than the on-off response time of the valve body from driving circuits 204, 205 and also a duty-control is conducted. Accordingly flow-in or flow of compressed oil thereby becomes possible to be controlled continuously and pertinently so that output from differential hydraulic pressure cylinder 1 can be controlled continuously and smoothly.
KONO KOZO
TAGAMI MASAFUMI
KIMURA YOSHIYUKI
| JPS58174701A | 1983-10-13 | |||
| JPS5936153A | 1984-02-28 | |||
| JPS60146953A | 1985-08-02 |