POSITION ERROR CORRECTING DEVICE

Title:

POSITION ERROR CORRECTING DEVICE

Document Type and Number:

WIPO Patent Application WO/1982/001601

Kind Code:

A1

Abstract:

A position error correcting device which can precisely correct the backlash and the pitch error of a mechanical system even if variations occur in states such as, for example, the temperature of a numerically controlled machine tool. An error correction data group previously obtained by measurements of the states of the machine tool is stored in an error memory circuit (MEM) correspondingly to the respective states. An error correcting data selection circuit (MPX) selects an error correction data group corresponding to the state of the machine tool from the error correction data group stored in the memory circuit (MEM). A position correcting circuit (CPG) adds a correction pulse to the command pulse of a feedback pulse from the position detector using the error correction data group selected by the selecting circuit (MPX) to correct the position.

Inventors:

NOZAWA RYOICHIRO (JP)
NAGAMINE TSUYOSHI (JP)
KAWAMURA HIDEAKI (JP)
MIYATA MITSUTO (JP)

Application Number:

PCT/JP1981/000308

Publication Date:

May 13, 1982

Filing Date:

October 28, 1981

Export Citation:

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Assignee:

FUJITSU FANUC LTD (JP)
NOZAWA RYOICHIRO (JP)
NAGAMINE TSUYOSHI (JP)
KAWAMURA HIDEAKI (JP)
MIYATA MITSUTO (JP)

International Classes:

G05D3/12; G01B21/00; G05B19/23; (IPC1-7): G05B19/19

Foreign References:

JPS4950583A	1974-05-16
JPS4854390A	1973-07-31
JPS482285A

Other References: