Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: Trebleplink on March 01, 2013, 11:45:40 AM

Title: Full Circle vs quadrants
Post by: Trebleplink on March 01, 2013, 11:45:40 AM

I read in the Mach 3 manual, and elsewhere that using circular interpolation (G3)  with a full 360 degrees (or even 180) is very bad.  But I seem to see constant examples of folks doing it - some very experienced folks.

Is this business of doing a quadrant at a time just a legacy limitation, and is now OK?  Or is it still a bad idea?  or is it controller dependent?   It is a lot easier to program one block to do it, but I don't want to invite trouble ...

Title: Re: Full Circle vs quadrants
Post by: BR549 on March 01, 2013, 12:56:36 PM

IF you use the  IJ method for arcs then full circles are fine .

IF you use the R arc method then you should use half or quadrant based circles.

(;-) TP

Title: Re: Full Circle vs quadrants
Post by: Trebleplink on March 01, 2013, 01:58:00 PM

Thank you very much!