Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: Segrest on August 09, 2013, 11:54:06 AM

Title: Circles instead of Arcs ?
Post by: Segrest on August 09, 2013, 11:54:06 AM

Hello Everyone,

I am using BobCAD v25 to generate gcode for my Mach3 controlled mill.  Most of my configuration is working well.

But when my gcode generates an arc, the result is a circle bigger than and well beyond the intended boundaries of the part.  The following line is an example of the gcode arcsbeing generated in my BobCAD post (nc) files:

     G03 X1.3285 Y.3853 I.0444 J-.0146

My gcode skills are not evolved enough to tell if this is a problem on the BobCAD or the Mach3 side of my process.

Can anyone point me in the right direction?

Bob

PS: I have tried to create this post a couple times now and keep getting errors.  My apologies to the group if this is generating duplicate topics.

Title: Re: Circles instead of Arcs ?
Post by: Segrest on August 09, 2013, 11:56:26 AM

Here is a copy of my Mach3 mill configuration file and a sample gcode file...

Bob

Title: Re: Circles instead of Arcs ?
Post by: ger21 on August 09, 2013, 11:58:13 AM

Try changing your IJ mode in General Config.

Title: Re: Circles instead of Arcs ?
Post by: Segrest on August 09, 2013, 12:49:01 PM

Thanks Gerry,

Changing the IJ setting from Absolute to Inc seems to have solved the problem.

Bob