[zoeper]

I am stuck with a particular problem regarding the way Mastercam posts my arc moves. I suspect that the problem must lie with either the machine/ control definition, or with the post itself. I have been using the system for a long time now and can not understand why it is only doing this now....

Problem: When cutting 2d contours, the nc file would contain G2 and G3 commands that also have a very small z move included. The parts i am cutting now was drawn up by myself in Acad and pulled into McamX3. I m sure there is no Z component in the arcs themselves. Can someone please point me in the right direction for where to start looking? at present i just delete the Z component from the command by hand, but this takes time and there is the risk of getting it wrong...
this is what the code looks like:
"
%
G37 J1
G90 G71 G0 T0 Z0.
X-40. Y0.
S2000 M42
T01 F600
M3
M07
X-14. Y-6.5 Z3.
Z2.
G1 Z-9.167 F250
G1 X0. F600
G1 X44.474
G1 X63.087 Y4.909
G2 X90. Y12.502 Z-9.165 I90. J-39.
G2 X141.502 Y-39. I90. J-39.
G2 X90. Y-90.502 I90. J-39.
G2 X63.085 Y-82.91 I90. J-39.
G1 X44.474 Y-71.5 Z-9.167
G1 X0.
G2 X-12.5 Y-59. Z-9.165 I0. J-59.
G1 Y-19. Z-9.167
G2 X0. Y-6.5 Z-9.165 I0. J-19.
G1 X-14. Y-11.5 Z-9.167
G1 X0.
G1 X45.602
G3 X46.125 Y-11.355 Z-9.165 I45.6 J-10.5
G1 X65.7 Y0.646 Z-9.167
G2 X90. Y7.5 Z-9.165 I90. J-39.
G2 X136.5 Y-39. I90. J-39.
G2 X90. Y-85.5 I90. J-39.
G2 X65.7 Y-78.645 I90. J-39.
G1 X46.125 Y-66.647 Z-9.167
G3 X45.6 Y-66.5 Z-9.165 I45.6 J-67.5
G1 X0. Z-9.167
G2 X-7.5 Y-59. Z-9.165 I0. J-59.
G1 Y-19. Z-9.167
G2 X0. Y-11.5 Z-9.165 I0. J-19.
G1 X-14. Y-6.5 Z-9.167
G1 Z-18.333 F250

[barbter]

Possibly a rounding issue - look at the format statement in the post?

[Superman]

What control & what post are you using ?

It doesn't look like a "normal" output,
---- G-codes not normally stated on each line, as they are "modal"
---- decimal points missing on feedrates

What happens if you use the same geometry, but drawn within Mastercam ?
- it could be an Acad glitch

what is set in the toolpath operation parameters regarding :-
-- cut parameters ( clearance, retract, top of stock, depth )
-- what cut-type ( 2d or 3D contour, ramp etc)
-- lead in/out ( **** you may have a ramp value set *** )
-- multi-passes
-- cut depths
( put up pics of each of these pages )

[zoeper]

The Control is a Anilam GXM (Crusader) from circa 1987~
I am using a post that was converted from Mastercam 9. The post was working fine in 9 and I am sure it never gave problems in X3....something must have changed.
I will check if the geometry is created in MC
The op in question did use depth cuts and multi passes, but no ramp was selected (2d contouring) i will check all the details again and post the screenshots if drawing in MC does not solve.
Thank you for taking the time to help.
P