VI. Dynamic positioning accuracy
To measure the dynamic tool tip
positioning errors, continuously move A-axis from 0 to +/-90 degrees back and forth 5 times at B = 0.
Repeat the same at B =
30 degrees and 60 degrees.
Continuously move B-axis from 0 to
+/-90 degrees back and forth 5
times at A = 0. Repeat the same at A = 30 degrees and 60 degrees. For a
complete measurement, repeat the above with
laser head at positions
1, 2, 3, and 4, and use the
2D time base to collect data
continuously. VII.
Measurement errors
of tool tip positioning measurement Laser system errors: 0.000010” Precision sphere: 0.000025”
Machine positioning: 0.000500”
Lateral coupling:
0.000070” (assume the maximum lateral
movement is less than 0.010” and 1.5” diameter sphere).
The largest error is
the machine positioning error 0.0005”.
Hence any improvement in the machine positioning
accuracy will improve the tool tip
positioning measurement accuracy.
VIII.
References [1] C. Wang and G. Liotto, “A laser non-contact
measurement of static positioning and dynamic contouring accuracy of a CNC
machine tool”, Proceedings of the Measurement Science
Conference, Los Angeles, CA January 24-25, 2002. [2] C. Wang, “A new laser non-contact method for the
measurement of spindle error motion”, Proceedings of ASPE 2001 Summer
Topic Meeting, State College, PA June 18-19, 2001.
IX. Need more
informationCall Optodyne at 310-635-7481 or your local
representative.Click here to down
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