Chordal tolerance control in circles on pen plotters for increas

Details Chordal tolerance control in circles on pen plotters for increas Chordal tolerance control in circles on pen plotters for increas

1993-04-28

1997-11-11

Evans, Arthur G.

395101, G06K 1500

Patent

active

056872984

ABSTRACT:
This is a method and associated implementation logic for plotting circles with a pen plotter to obtain a substantial and unexpected increase in throughput of the plotter when plotting circles having a radius equal to or smaller than a small radius lower limit. The method comprises the steps of, employing an independently calculated chord length and number of chords at the independently calculated chord length for plotting circles having a radius greater than the small radius lower limit; and, employing a maximum chord length which is not separately discernable to the naked eye in a circle of a desired radius and an associated number of maximum length chords when plotting a circle having a radius equal to or smaller than the small radius lower limit. In tested embodiments, the method has provided a twelve-fold increase in plotter throughput when plotting small radius circles.

REFERENCES:
patent: 4542412 (1985-09-01), Fuse et al.
patent: 4654805 (1987-03-01), Shoup, II
patent: 4809195 (1989-02-01), Bechet
patent: 4937632 (1990-06-01), Dalton
patent: 4941116 (1990-07-01), Hancock et al.
patent: 5224064 (1993-06-01), Henry et al.

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