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SW dxf to Libre to OpenBuilds CAM

Discussion in 'CAM' started by Chris611, Dec 7, 2022.

  1. Chris611

    Chris611 New
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    I am struggling and have been searching, but just can't the image in CAM to look like the part. I created a part in Solidworks. Exported as dxf. Put into Libre and selected all, tools, polylines, create polyline from existing segments. Then export as MakerCAM SVG. Open in OpenBuilds CAM. I have 2 paths and can create the g code, but there are no arcs. It's all straight lines where there should be arcs.

    Any thoughts on this? See attached screen shot and files. cam.JPG sw.JPG
     

    Attached Files:

  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Export as DXF R14, not SVG

    See Problems with importing DXF into OBcam as a step by step example with QCAD
     
  3. Chris611

    Chris611 New
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    Thanks for the lightening fast response!! That worked better. A couple issues.
    1) The part was made in SW. About 2" x 2" overall. When it comes into CAM it appears the dimensions are in mm. Not converted, but like 2" is now 2mm.
    2) The hole doesn't show up in CAM. If I move the outline a few times and do a control Z, then the hole shows up. And the move has distorted the outline.

    t2.JPG t3.JPG
     
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Use the Transform tool, instead of mouse move to move the entity. Toolbar on the left, icon that looks like a ruler.

    As for the size - possible you used the SVG file in this workflow? Original DXF out of Solidworks > QCAD > Polyline > Into DXF again shouldn't change sizes. SVG is unitless (well, uses Pixels and DPI - artwork dimensions not physical). Otherwise export as millimeter from SW. CAM is still metric only

    Check the Documents tree - its still a DXF Circle (not a polyline) - convert it to Polyline too
     

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