Title:
THREADING CONTROL METHOD AND CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2004/069459
Kind Code:
A1
Abstract:
Threading control method and controller in which machining accuracy is enhanced while prolonging the lifetime of a tool by preventing shift of groove without correcting a programmed command when threading operation for controlling movement of a threading shaft in synchronism with rotation of the spindle is performed a plurality of times at the same position. When a spindle single-revolution reference signal and a spindle position counter are inputted to a numerical controller, a spindle position calculating means (103) calculates the current spindle position and, from the spindle position thus calculated, a spindle position correcting means (104) determines the difference between the spindle single-revolution reference signal and a control period as a correction amount (108), thus correcting the spindle position. A threading shaft interpolation start detecting means (105) monitors synchronism of the spindle single-revolution reference signal with the control period, and each shaft interpolating means (106) begins to interpolate the threading shaft upon synchronization.
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Inventors:
TANAKA TAKAHISA (JP)
Application Number:
PCT/JP2003/001245
Publication Date:
August 19, 2004
Filing Date:
February 06, 2003
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
TANAKA TAKAHISA (JP)
TANAKA TAKAHISA (JP)
International Classes:
B23G1/02; B23Q15/00; G05B19/18; (IPC1-7): B23G1/02
Foreign References:
| JPS6294222A | 1987-04-30 | |||
| JPS59187422A | 1984-10-24 |
Attorney, Agent or Firm:
Miyata, Kaneo c/o Mitsubishi Denki Kabushiki Kaisha (2-3 Marunouchi 2-Chom, Chiyoda-ku Tokyo, JP)
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