Well the older and more inaccurate your CNC machine is the more likely it is that your machine will leave a mark at the entry and exit point. You sort of creep up when it’s not looking.

No there is no sexual inuendo here it just means you approach the circle using in a circular move.

At my age you’re glad of all the tangential approaches you can get. How cool is that and you even get a tangential approach. It’s the an all inclusive holiday of circular milling except you don’t gain weight and you’re not pissed everyday. G1 G40 X0 Y0 Now if you have a Toshiba with Tosnuc control or Haas or maybe a Yasnac CNC control….ĬNC Milling G02 G03 to produce a full circle you just need this: It’s so easy and it saves leaving a mark. Remember that song by the Average white Band “Let’s Go round Again”? I used to love it.Īctually I still do, as an old twat I’m allowed to like this shit. G1 G40 X0 Y0 But this is really all you need G0 G53 Z0 All in one complete with wasted Code G1 G40 X0 Y0 (Cancel Cutter Compensation) Training Courses Let Me at Em CNC Milling G02 G03 to Produce a Full Circle, here’s the code. OK so just imagine you want to mill internally around a 40mm diameter circle. Oh and the other one used I and J and X and Y. The other one said he got the bloke who did it in two halves to do it for him. One said he copied some code he already had in the machine. One said he broke the circle into two halves. What they were doing was perfectly correct but definitely not the simplest way. The answers they gave shocked me, I had to take out my hip flask and drink a large shot of brandy. Last week I was training four very experienced programmers and I asked them how they would programme a full circle. To produce a full circle on a Fanuc or Haas G code type programming system is really easy.

Haas g code simulator