Thanks again for looking at this.
We seem to be getting nowhere fast ;-) but if you look at my picture:
http://www.sparetimelabs.com/gplot.pngthe white line is the compensated toolpath.
Starting from the origin at 0,0 the first two lines:
G1 X0 Y0
X0 Y2 G42 P0.2
produce the slightly slanted lead in move, correctly.
Then the next G-code line is (thats absolute IJ mode):
X1 G2 I2 J2
Now in my view this should produce an error message because
there is no arc that can be drawn from 0,2 to 1,2 with arc center at 2,2.
But it produced the white horizontal segment in the compensated toolpath,
or a sprial (the purple line) for the uncompensated path. Both seem to be wrong,
in that Mach3 manual mentions nothing about spirals and OTOH if spirals are
valid resulst for G2/G3 moves, why is the compensated spiral suddenly a
horizontal move?
You also wrote:
"You also may want to study up on the structure of the block coding.
Certain things come before others or unexpected results can occurs."
According to Mach3 manual:
"The first group (the words) may be reordered in any way without changing the meaning of the line."
"If the second group (the parameter settings) is reordered, there will be no change in the meaning
of the line unless the same parameter is set more than once. "
So I do not see how that would apply here.
br Kusti