Re: [CAD_CAM_EDM_DRO] milling pockets with EMC

david_margrave wrote:

>
>Hi,
>
>I'm reading the smid book on CNC programming and noticed that for
>milling slots and rectangular pockets, cutter radius compensation is
>not used, but it is used for milling circular pockets.
>
>It seems you give up the benefit of changing tool sizes after the code
>is generated if you don't use cutter compensation.
>
>

Hmm, must have been too complicated for the author of that book to figure
it out. Cutter radius compensation is definitely one of those things on
CNC that gets people gnashing their teeth, especially the first few times
they do it.

There's some stuff I wrote several years ago, with a strong EMC slant
at http://www.timgoldstein.com/cad_cam/rs274.htm and it has a link for
cutter diameter compensation. It has an example of a part I cut using
the compensation. I wrote the G-code for the actual part outline by
hand in G-code. I hope you find this helpful.

Jon