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Problem with Using cura for PCB slicing


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Posted · Problem with Using cura for PCB slicing

I'm using Cura to slice an STL File with PCB traces. Everything is working well except that close traces are being connected together in the resulting gcode. Attached is a picture of a test board, you see none of the traces are connected together which is fine, but in the resulting gcode, the traces are connected together. I have combing off, retraction enabled, z hop when retracted also enabled with a z hop height of 1 mm.

 

I checked the gcode and found that there's no Z hopping between these points. Any help please? 

ThanksUntitled.thumb.png.47d2cd16f18ac29c7c8ec6584a138581.pngthumbnail_IMG_20200506_031300.thumb.jpg.a46e28fabed5176ce0cf1a1aee40915e.jpg

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    Posted · Problem with Using cura for PCB slicing
    3 hours ago, hamodeh21 said:

    I have combing off, retraction enabled, z hop when retracted also enabled with a z hop height of 1 mm.

     

    What's the value of "Retraction Minimum Travel"?

     

    grafik.png.145211f0501de767fa2519045f06994e.png

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    Posted · Problem with Using cura for PCB slicing

    it was set to 1.5mm, reduced it to 0.4mm and I got retractions where it shouldn't retract, set it to 0.6mm and now it works. I guess I need to tune this for different circuits. Thanks mate appreciate it :).

     

    Also, is there a way to force it to draw each trace only once? for example, it went over every line twice. Can I get it to draw the line only once? I have my trace width at 0.4mm and the wall thickness is set to 0.4mm.

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    Posted · Problem with Using cura for PCB slicing
    13 hours ago, hamodeh21 said:

    it went over every line twice. Can I get it to draw the line only once?

     

    I'm not sure, i think that's simply how the CuraEngine lays down the paths.


    If it's possible at all, the "print thin walls" feature may influence this (dunno 🤷‍♂️).

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