Formula for.G02 G03 arc centre (x,y)

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8 years 1 month ago - 8 years 1 month ago #117432 by berntd
Replied by berntd on topic Formula for.G02 G03 arc centre (x,y)
Haha

Yes, that is pretty good.
Bernt = me, has pages full of scribbles trying to solve exactly those 2 equations as above. That is why I had to give up as I just could (no longer) solve them.
You would never believe that Idid 5th year mathematics at University.
In those days, there was no Matlab.

But we digress...
There are 2 possible answers as 2 circles can go through the same 2 points with a give radius (also obvious from the quadratic equations).

I have since changed tack.
I am evaluating whether using the 2 circles and triangles formed by the centre to centre line and the intersecting 2 point line may help solve this problem.

I have not concluded that investigation yet.

I think you mentioned that method as well in your reply.

Lots of tutorial videos all show how simple writing G-code is but none of them show any examples of arcs that are not nicely 90 degrees. HA!


Regards
Bernt
Last edit: 8 years 1 month ago by berntd.

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8 years 1 month ago #117520 by andypugh
Replied by andypugh on topic Formula for.G02 G03 arc centre (x,y)
Out of interest, why do you need this?

If you know the centre already you can use centre-format arcs. If you know the start and end and radius required you can use radius format arcs.

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