I think it comes down to constructing lines perp to the profile at
probed points. CMM's obviously take care of this somehow.
I've done it the hard way by drawing circles the diameter of the probe
and then doing three pt arcs to fit. Certainly there are better and
considerably more elegant ways to do this. What I can visualize in
concept I cannot convert to good calculations. ;-) I passed calculus
but knew better than to try dif-e-q. A second order curve fit tangent to
multiple circles might be a better approach.
"Implementation is left as an exercise for the student." :-)
Dave
On 2/4/20 3:57 AM, andy pugh wrote:
Does anyone have a G-code routine to probe around a profile to trace it out?
I imagine some sort of "keep turning right" algorithm should be able
to walk round a profile, though exactly how you compensate for probe
diameter on external corners has me a bit stumped.
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