Digitizing control apparatus

• US 5,550,330 A
• Filed: 03/10/1995
• Issued: 08/27/1996
• Est. Priority Date: 10/16/1991
• Status: Expired due to Fees

• Current Assignee: Fanuc Ltd (Fanuc Corporation)
• Original Assignee: Fanuc Ltd (Fanuc Corporation)
• Inventors: Tsukamoto, Osamu, Matsuura, Hitoshi
• Primary Examiner(s): Chin, Stephen
• Assistant Examiner(s): Shankar, Vijay
• Application Number:
  US08/401,643
• Time in Patent Office: 536 Days
• Field of Search: 178/18, 178/19, 364/453, 364/474.03, 364/474.05, 364/474.28, 364/560, 364/565, 364/566
• US Class Current: 178/18.02
• CPC Class Codes: B23Q 35/128 Sensing by using optical means
• CPC Class Codes: G05B 19/41 characterised by interpolation, e.g. the computation of intermediate points between programmed end points to define the path to be followed and the rate of travel along that path G05B19/25, G05B19/31, G05B19/37, G05B19/39, G05B19/40 take precedence
• CPC Class Codes: G05B 19/4207 in which a model is traced or scanned and corresponding data recorded
• CPC Class Codes: G05B 2219/36048 Verify, probe workpiece, if position deviation edit, modify program

Abstract

The present invention relates to a digitizing control apparatus for outputting smooth data along an original tracing path by correcting digitized data. Coordinate data of a digitized model surface is calculated by adding coordinate data commanding a tracing path on a model surface to the measuring displacements at trace measuring points of a sensor. Coordinate data of the respective trace measuring points is corrected to digitized data approximated by a new coordinate point on a tracing plane containing the tracing path. Corrected coordinate data is output as smooth digitizing data along the original trace path.

Claims

1. A digitizing control apparatus for outputting digitized data of a model configuration from measuring displacements of a sensor tracing a three-dimensional model surface, comprising:

calculation means for calculating coordinate data of a digitized model surface by adding coordinate data commanding a tracing path on said three-dimensional model surface to the measuring displacements at trace measuring points of said sensor; and

correction means for correcting the coordinate data of said trace measuring points to digitize data approximated with a new coordinate point on a tracing plane containing said tracing path by using a trace measuring point where a vector connecting the center of gravity of said trace measuring point and the measuring points located in front of and behind said trace measuring point to said trace measuring point intersects a tracing plane containing said tracing path as a new coordinate point.