Title:
METHOD OF CONTROLLING POSITIONAL LOOP GAIN
Document Type and Number:
WIPO Patent Application WO/1984/004981
Kind Code:
A1
Abstract:
A positional loop gain control method in which a positional control feedback system composed of a speed control circuit (101c), a spindle motor (102), a position coder (104), a fixed-position stop control unit (101e), and a changeover switch (101b), determines the gain of a digital-to-analog converter (301) constituting the fixed-position stop control unit so that the positional loop gain of the positional control feedback system has a set value Kp. When controlling the position at which a spindle stops, the method comprises a step of operating the spindle motor at a predetermined speed Nb, a step of measuring a deceleration time Tf required for the speed of the spindle motor to drop from Nb to zero, and a step of determining a gain KDA of the digital-to-analog converter using the set value Kp, the predetermined speed Nb, the decelaration time Tf, and a distance D between a fixed position and a changeover point at which a speed-control mode is shifted to a position-control mode.
Inventors:
OTA NAOTO (JP)
Application Number:
PCT/JP1984/000302
Publication Date:
December 20, 1984
Filing Date:
June 12, 1984
Export Citation:
Assignee:
FANUC LTD (JP)
International Classes:
G05B19/23; G05D3/12; (IPC1-7): G05D3/12; G05B13/02
Foreign References:
| JPS5636701A | 1981-04-10 | |||
| JPS5697105A | 1981-08-05 |
Other References:
See also references of EP 0150216A4
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