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Author Topic: Arcs I ... K .... and all the others  (Read 2910 times)

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Offline Tef9

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Arcs I ... K .... and all the others
« on: June 23, 2008, 09:15:49 AM »
Hello,

I am looking to Gcode a basic arc, however I have no idea where to start, I have written taper, and (thanks to Graham) doubble tapers so I suppose an arc is the next logical progression.  I know they use the I and K values however this is the limit of my knowledge.

If anyone has a straighfoward example they could share or code somthing up quickly that would be great.

I am useing a small sherline cnc lathe.

Cheers,

Andy
Re: Arcs I ... K .... and all the others
« Reply #1 on: June 23, 2008, 09:49:40 AM »
Hello Andy,
http://www.machsupport.com/docs/Mach3Turn_1.84.pdf
Check out chapter 10.7.3
It should answer most of your questions.
RC

Offline Tef9

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Re: Arcs I ... K .... and all the others
« Reply #2 on: June 23, 2008, 10:05:28 AM »
Hi,

Thanks for this, and gives me somthnig to read, however I do learn better with code examples if any one has a simple one to offer.

Thanks,

Andy

Offline Graham Waterworth

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Re: Arcs I ... K .... and all the others
« Reply #3 on: June 23, 2008, 05:56:32 PM »
Ok, here is a bit of code :-

For a lathe to put a 5mm rad on the end of a bar in diameter mode.

G00 X0 Z0 (move to start point)
G03 X10. Z-5. R5. (form rad)
G00 X50. Z50.(rapid away)

Graham.


America gave us powered flight, England the steam train and Germany the car.  Who invented the first boat?