REFERENCE POINT RETURN SYSTEM

Title:

REFERENCE POINT RETURN SYSTEM

Document Type and Number:

WIPO Patent Application WO/1990/004815

Kind Code:

A1

Abstract:

This invention relates to a reference point return system for executing a reference point return operation in a numeric controller. It consists of a deceleration dog (3) disposed on a machine table (1), a deceleration limit switch (2) operated by the deceleration dog (3) and generating a deceleration start signal and time setting means (6) for setting a deceleration time (T1) from the deceleration start signal to a deceleration end signal and a deceleration speed moving time (T2). Reference point return processing means (5) starts deceleration on receipt of the deceleration start signal and stops a table at a first electrical grid point attained after the passage of the deceleration speed moving time (T2) after the passage of the deceleration time (T1).

Inventors:

IKEDA YOSHIAKI (JP)
KUWASAWA MITSURU (JP)
ITO KENICHI (JP)

Application Number:

PCT/JP1989/000998

Publication Date:

May 03, 1990

Filing Date:

September 29, 1989

Export Citation:

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Assignee:

FANUC LTD (JP)

International Classes:

G05B19/401; G05B19/414; G05B19/18; G05D3/12; (IPC1-7): G05B19/18; G05D3/12

Foreign References:

JPS62260201A	1987-11-12
JPH05451076A

Other References: