contour follow and contour polygon problems

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matt venn
2013-08-19
2013-09-05
  • matt venn
    matt venn
    2013-08-19

    Hi there. I'm just starting to use pycam's 3d functionality - used to using it for 2.5d stuff for a while now.

    I'm having problems with a simple model with the contour follow and contour polygon strategies.

    I'm using 0.5.1 on ubuntu 12.

    The model, and screen shots are all here: https://github.com/mattvenn/cad/tree/master/openscad/cast

    I can get contour follow to work if I rotate once in the z axis.

    Any help would be great,
    thanks
    Matt

     
  • matt venn
    matt venn
    2013-09-05

    OK, I think the contour follow strategy has bugs, but that is warned about.

    I also had assumed that the contour follow would use 'important' heights for the contours, but it is evenly spaced based on the maximum cut depth. See this feature request: https://sourceforge.net/p/pycam/feature-requests/15/

    I've got good results by doing a rough slice and then using the surface strategy in both x & y.

    I can't see the point in the contour follow given that to get accurate Z I would have to set the z increment very low, and then this strategy takes a lot longer to calculate than the surface strategy.