Re: [rp-ml] circular interpolation

From: Caleb at Chinook Sailing Products (
Date: Wed Mar 14 2007 - 18:13:58 EET

Fintan, your controller if it supports "standard" G codes may be using G0 point to point moves instead of G1 linear interpolation. Depending on you controller settings this can be relatively smooth motions. To properly program circular interpolation or Arc moves, I would use a "CAM" program especially if you profiles are of any real complexity. You can get stripped down 2 - 3 axis CAM for free many times. I know SurfCAM was offering such a version recently. Alternately, you may investigate the possibility that your controller supports Spline interpolation G1.1 in some code.


-Caleb Walker
-Purchasing/Product Development
-Phone (541) 374-5005
-Chinook Sailing Products
-HiFly America

  ----- Original Message -----
  From: fintan mac cormack
  Sent: Wednesday, March 14, 2007 2:53 AM
  Subject: [rp-ml] circular interpolation

  Dear List this could be a little off topic but i have been working on a home project where i made a simple CNC router that can cut out material and allow me to manually build up a 3D model. I have also written some software that slices a 3D model to generate the 2D layers. The question i have is when i generate the 2D layer it ends up producing a profile made up of a set of points, which the controller then converts into a set of straight line motions. I was wondering if there is a better way of doing this, the controller i have can do circular interpolation but how would you convert these set of points into circular motions. Any help would be greatly appreciated


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