So the same will be with MadCam ? And all other cam software ?

I guess so as they all work in a similar way, you have to turn 3d data into a 2d line to put a tool around it,  If you extract an arc as line segments it causes all sorts of problems with tool comp and the like so its worth finding out how to do the job right, its not Mach that is at fault here.

Graham

Thank you for your help ! I will try to learn how to write .nc files for 3d models.

I don't understand anything, today i downloaded .nc file witch i attached in first post and now it is working perfect !?!? I didn't changed anything, didn't installed or uninstalled any programs and didn't change any settings. Now the green dot go by blue path exactly.

Yesterday windows was updating 3 updates before shutdown. Can it be a reason ?

Ok here we go again:

First i have writed to MadCam support, because i was thinking it's madcam postprocesor problems, but they looked and told me it's mach3 problems.

When i am cutting, somehow cnc machine cut one corner is with radius, another one is ok. But it should be both not rounded !

Attached pictures.

Attaching .nc file and toolpath pictures, "back ploted" is from madcam support, they told me that everything is ok. I need to check problems in controler.

Also attaching .dxf file.

As you can see all coners are not rounded, but somehow machine cut one corner with radius another one without

Attach your xml file you are using.
Try this....reverse the cutting / path direction ( in your cam ) and see if it reverses the radius to the other side of that cut
when run in Mach.
I don't use any of the software that you are using so no help on them.

RICH

looking at the code you have no G02 or G03 commands so the issue has to be related to the CV settings you have set, increase the look ahead and reduce the feed by half for a start and then see what the difference is.

Graham

Thank you, i will try to reduce the feed rate. But it's not very big, 3000mm/min.