On Wednesday 30 October 2013 15:30:14 Bertho Stultiens did opine:
> On 10/30/2013 06:42 PM, Gene Heskett wrote:
> [snip]
>
> > Generates:
> [snip]
>
> > G2 X9.97547740 Y9.97547764 Z9.97547781 I10.00000000 J0.00000000 P3
>
> That is seriously wrong...
>
> The generated code should read:
> ...
> G2 X10.00000000 Y10.00000000 Z10.00000000 I10.00000000 J0.00000000 P3
> ...
>
> Is you add a "move([0,0,0]);" before the arc, does it still come out
> with a fractional XYZ position?
>
> You may want to try:
> spindlespeed(400);
> feedrate(100);
> spindle(1);
> literal("( initial global pos ", global_position, " )\n");
> literal("( global offset ", global_offset, " )\n");
> move([0,0,0]);
> literal("( before arc global pos ", global_position, " )\n");
> arc_cw([10, 10, 10], 10, 3);
> literal("( after arc global pos ", global_position, " )\n");
> spindle(0);
>
> Then you can see in the generated code what the positions evaluated to.
> The initial position should have been initialized to zero on all axes
> and the offset should read zero if none set on the command-line.
>
> My local compile gives:
> ...
> S400.00000000
> F100.00000000
> M3
> ( initial global pos
> [0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm] )
> ( global offset
> [0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm] )
> G1 X0.00000000 Y0.00000000 Z0.00000000
> ( before arc global pos
> [0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm] )
> G2 X10.00000000 Y10.00000000 Z10.00000000 I10.00000000 J0.00000000 P3
> ( after arc global pos
> [10.000000mm,10.000000mm,10.000000mm,0.000000mm,0.000000mm,0.000000mm] )
> M5
> ...
Hmmmm, not at all what I got:
===========
(gcmc compiled code, do not change)
(2013-10-30 15:26:56)
(-- prologue begin --)
G17 ( Use XY plane )
G21 ( Use mm )
G40 ( Cancel cutter radius compensation )
(-- prologue end --)
S400.00000000
F100.00000000
M3
( initial global pos
[0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm] )
( global offset
[-1.955982mm,-1.955967mm,-1.955956mm,0.000000mm,0.000000mm,0.000000mm] )
G1 X-1.95598221 Y-1.95596695 Z-1.95595554
( before arc global pos
[0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm] )
G2 X8.04401779 Y8.04403305 Z8.04404446 I10.00000000 J0.00000000 P3
( after arc global pos
[10.000000mm,10.000000mm,10.000000mm,0.000000mm,0.000000mm,0.000000mm] )
M5
G2 X8.04401779 Y8.04403305 Z8.04404446 I0.00000000 J0.00000000 P3
M5
(-- epilogue begin --)
M2
(-- epilogue end --)
But I also have an offset that will not "home" or touchoff out, of +.003z
This is something else I have noted before, so I'll stop it, delete the
.var and .txt files & try again.
I guess I must have taken them out of my ini file as way more trouble that
they are worth, a restart got rid of the +.003Z offset in the dro display,
but the above code now gives a zero radius arc in line 18 error. Then,
looking at the arccw.test.gcmc file again, somehow the last 2 lines got
duplicated. Removed them and recompiled, got this now:
=============
(gcmc compiled code, do not change)
(2013-10-30 15:43:08)
(-- prologue begin --)
G17 ( Use XY plane )
G21 ( Use mm )
G40 ( Cancel cutter radius compensation )
(-- prologue end --)
S400.00000000
F100.00000000
M3
( initial global pos
[0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm] )
( global offset
[-0.026255mm,-0.026255mm,-0.026255mm,0.000000mm,0.000000mm,0.000000mm] )
G1 X-0.02625543 Y-0.02625519 Z-0.02625501
( before arc global pos
[0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm,0.000000mm] )
G2 X9.97374457 Y9.97374481 Z9.97374499 I10.00000000 J0.00000000 P3
( after arc global pos
[10.000000mm,10.000000mm,10.000000mm,0.000000mm,0.000000mm,0.000000mm] )
M5
(-- epilogue begin --)
M2
(-- epilogue end --)
=============
Works, draws a nominally 20mm diameter spiral, moving z up for nominally
2.25 revolutions in the xy plane. So starting at XYZA = 0.0, 0.0, 0.0,
0.0, the ending position is
0.975, 0.975, 0.975, 0.0.
Is that the intended action? Spindle-at-speed display=400, so that works.
Cheers, Gene
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Whenever I feel like exercise, I lie down until the feeling passes.
A pen in the hand of this president is far more
dangerous than 200 million guns in the hands of
law-abiding citizens.
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