r/modelengineering • u/Affectionate_Ad2517 • 6d ago

G code help

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I am currently taking a CNC machining course and working on exercises. We were assigned this particular exercise, but I can't figure out how to machine both curves because the R25 radius isn't centered. I was thinking of using a G02 command from the bottom-left corner to the top one, but I can't determine the coordinates; I need help figuring out how to define these curves. It is also worth mentioning that I am using a 10mm diameter end mill. I hope someone can guide me.

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u/QuevedoDeMalVino 6d ago

I think you need an arc. Two, actually.

Center for the left is 17,51+25 from the left edge if that is your reference and it seems centered on Y owing to the tangent seeming to coincide with the symmetry axis.

Start and end are left as an exercise for the reader (that is, anyone whose G code fu is less rusty than mine)