Document Type and Number:
Japanese Patent JPH0245202
Kind Code:
B2
Abstract:
The system has a proximity sensor 10 with a part 10a on spindle 7, and a fixed part 10b including three safurable reactors SRA1 to SRA3 one after another. An output DV2 derived from SRA2 is zero when the spindle 7 is in the desired position (part 10a confronting SRA2), positive when the spindle 7 is slightly to one side of that position and negative when the spindle 7 is slightly to the other side, and provides a fine positioning signal. …The sum ASV of outputs DV1 and DV3 derived from SRA1 and SRA3 takes values which indicate when the spindle 7 enters the environs of the desired position. DV2 and ASV and an actual speed signal AV are fed to a position deviation signal (RPD) generating circuit 11a. …Circuit 11a first delivers a position deviation signal RPD of an initially set voltage ISV corresponding to one spindle revolution. …When signal ASV indicates the spindle has entered the environs of the desired position, circuit 11a generates a coarse position signal CPD by subtracting the integrated value of AV from ISV, then a bias signal BIS is supplied until ASV indicates the spindle has re-entered the environs of the desired position. Then circuit 11a uses DV2 to bring the spindle to the desired position when DV2 is zero.
Inventors:
KOZAI YOSHITOKU
FUJIOKA YOSHIMOTO
OOTA NAOTO
FUJIOKA YOSHIMOTO
OOTA NAOTO
Application Number:
JP13015479A
Publication Date:
October 08, 1990
Filing Date:
October 09, 1979
Export Citation:
Assignee:
FANUC LTD
International Classes:
B23Q5/20; B23Q5/00; G05B19/39; G05D3/00; G05D3/12
Next Patent: JPH0245203