TimH
Hot Rolled
- Joined
- Oct 12, 2004
- Location
- Upstate NY
Can I use G03 or G02 to do an arc defining it with degrees & radius not an x/y end point. Thanks Tim
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If you have the start position, direction of rotation and circle center location (i,j) then there is only one solution.Radius and angle has an infinite number of solutions, so you still need more info. Endpoint still not enough,
ROFLMAO!!Pretty inventive thinking.... Except you'll be slam-milling between hole locations doggy-style.
I have to program multiple "arc" passes. I like to work from the center of my work piece versus a corner. On my old Heidenhain you could do coordinates either linear or polar. It was pretty handy. I'm suprised it can't be done with G codes.Yes, G12 and G13 are two awsome cycles, specially with full cutter comp. Doesn't apply here since you want angle and radius, but for interpolating a circle they are indispensible.
Still wondering why you'd want the angle as a definition though?
On the Heidenhain I just defined CC ( circle center) then program Circular Path then define Polar Radius & Polar Angle.The machine still neds to know where the center point is, Heidenhain or not!
As for center point programming, we all do it. Center point, off-part 0 point, whatever.
I still think you're a little unsure how to use the work coords. Feel free to post a question.
Well my book and my standard (DIN 66025) say it's for circular path in polar coordinate system. Circular pocket milling would be G77 and G78 according to my book.My book says G12 & G13 are for circular pocket milling.
It is useful for doing circle moves greater than 360 degrees, programming off a print where features are dimensioned in angles with given center points, that way you don't have to do any calulations. You can also progam lines with just angle and distance. So why plot or trig it out when you can enter in the coordinates directly...less work.Still wondering why you'd want the angle as a definition though?
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