Title:
POSITIONING METHOD FOR NC DEVICE
Document Type and Number:
Japanese Patent JPH05341824
Kind Code:
A
Abstract:
PURPOSE:To omit the pre-processing equivalent to a single block and also to ensure the high positioning accuracy by carrying on the linear interpolation after permuting the value of shift extent with the value obtained by subtracting the following shift error produced by an external signal from a prescribed shift extent when the external signal is inputted during the execution of a linear interpolation command. CONSTITUTION:In a 1st step, the extreme value set in the driving direction of a drive axis which performs the positioning is previously defined as the command value of a linear interposition and a stop shift extent is previously set in a range covering the input of an external signal through the stop of the drive axis. In a 2nd step, the remaining shift extent obtained by subtracting the shift extent of the drive axis from the command value of the linear interpolation is monitored. Then the 1st steep is reset when the remaining shift extent is equal to 0 and otherwise a 3rd step is set. In the 3rd step, the 2nd steep is reset when the external signal is not inputted yet. When the external signal is inputted, the shift extent obtained by subtracting the follow-up deviation set with input of the external signal from the stop shift extent is permutated with the remaining shift extent. Then the drive shaft is moved by an extent equal to the permuted remaining shift extent and then stopped.
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Inventors:
ENDO KATSUHIRO
Application Number:
JP14958492A
Publication Date:
December 24, 1993
Filing Date:
June 09, 1992
Export Citation:
Assignee:
FANUC LTD
International Classes:
B23Q15/22; G05B19/18; G05B19/19; G05B19/4155; G05D3/12; (IPC1-7): G05B19/18; B23Q15/22; G05D3/12
Attorney, Agent or Firm:
Aoki Akira (4 outside)