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Tom Zurich

Toolpath precision / accuracy of gcode-output

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Dear Everybody

I am working with a very rough ceramics extruder - 6mm nozzle size, quite big objects. (up to 1x1x1 m)

Is there any possibility to set precision / roughness of cura s g-code output ?

 

i would love to have / or search something like a

  • "minimum gcode step length" setting.
  • "maximum toolpath deviation" setting

i would love to have smaller file sizes, less lines of gcode, bigger steps / distances between each G01 position.

 

( I know i can downsample the input .stl, but still cura will perform offset calculation for each slice / layer. )

 

Or is there any filter / plug-in that allows to access the geometrie data before g-code is generated / exported ?

 

thanks for your support.

 

best from Zürich / Switzerland

 

Tom

 

 

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What's wrong with "downsampling"?  It's very easy to do and will make slicing go faster as well.  I've used meshlab to decimate and it's easy, quick, and gives good results.

 

http://www.shapeways.com/tutorials/polygon_reduction_with_meshlab

 

What you ask for I believe is hard coded into the slicer.  I don't think it's a setting.  You'd have to recompile the "engine" (the c++ code) I think.

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(downsampling doesn t do the best / entire job)

why:

 

Dear gr5

- thanks for your fast reply - but downsampling the input mesh-data will not do the optimum reduction.

if the triangles or quads of the initial mesh are sliced close to vertices - the slicing result will have very short segments - nearly identical points.

the offset of this polyline then might even have smaller segments.

i am searching to filter those points / segments with a certain tolerance / deviation (for me 0.1 to 0.5mm would be great).

thanks again

best

tom

toolpath_noise_04.png.829607ede4f4efad958d367c0e2a9a16.png

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@ahoeben or @smartavionics or @ghostkeeper - I believe if a line segment is super short cura just discards it at some point.  Is there a way to set the tolerance of which line segments are discarded.  The picture above is - well really really good at explaining why this user wants to remove points and because he uses a 6mm nozzle (large scale printing) he wants to increase the existing threshold of what is discarded.

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