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Free-Cad to OpenBuilds

Discussion in 'CAD' started by jltcet, Nov 14, 2023.

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  1. jltcet

    jltcet Well-Known
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    Could someone take a look at this I believe to be Gcode but to tell the truth Im still learning here, You all helped me get the driver thing figured out machine works great. I thought I read some where that OPenbuilds dosen't use G-code but grbl Ive been using Free Cad to design (play around with) I imputed the tool paths and copied the G-Code (I THINK) but when I import it into Openbuilds I get gibberish. Im not even sure I doing this correctly. Or is there a free design software for MAC I can DL and practice on that will produce the correct code for openbuilds. Ive included the screen shot of Openbuilds of what it imports and what I have. If I have to use something other then Free cad I'de like to start now learning before I get to attached to freeCad
     

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  2. Alex Chambers

    Alex Chambers Master
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    Your screenshot is definitely not g-code. Your PDF is, but not grbl compatible g-code - there should be a header containing codes to set your controller properly. Things like whether your units are mm or inches, telling it to use absolute movement mode, which workplace co-ordinate system to use etc. Did you use the grbl post processor with freecad? Apparently even that has some issues with outputting grbl compatible g-code - eg, by default it uses codes grbl doesn't understand with a drilling toolpath. I did have a look at Freecad when I started and decided that the learning curve was too steep for me and lots of stuff was not really explained so I opted to use both Vectric and Fusion 360 - the latter is free for hobby users. Vectric is not free, but very easy to learn.

    Alex.
     
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  3. jltcet

    jltcet Well-Known
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    Thank you Ill take a look
    as for Free Cad theres so many options for export its over whelming Still learning all this not sure what to look for I watch a lot of video on YouTube but Ill concentrate on stuff that uses grbl Maybe I should ask is there a way to convert g-code to grbl I saw something called Inkscape ( not sure what ive gotten my self into here) I though it be easy and fun. Just a learning curve I figure it out with help along the way

    Thanks
     
  4. Alex Chambers

    Alex Chambers Master
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    Grbl is a control programme that uses g-code - grbl compatible g-code uses a (fairly extensive) sub-set of all the possible g-code commands because it was developed for 8 bit controllers with limited memory. Yes, there is a learning curve (more than one actually - cad/cam to design, create toolpaths and output g-code that is compatible with your machine's controller and then you need to understand the processes involved in milling/routing your chosen material) but you will be surprised how quickly stuff that is baffling now becomes familiar.

    Don't hesitate to ask questions here, this is a great community for support - remember the only stupid question is the one you didn't ask.

    Alex.
     
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  5. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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  6. jltcet

    jltcet Well-Known
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    No I haven't theres a lot to take in but I will thanks for the link
     
  7. jltcet

    jltcet Well-Known
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    I think fusion360 is becoming my new friend so far been messing with it most of the day I found a video on making the gcode for openbuilds I’ll let you know how it’s going in a few days thanks again for the help
     
  8. Alex Chambers

    Alex Chambers Master
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    Do please use the Openbuilds post processor for Fusion;-

    docs:software:fusion360 [OpenBuilds Documentation]

    Alex.
     
  9. jltcet

    jltcet Well-Known
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    Look at that I actually made it do something LOL Of course it was only a simple simulation BUT WOW Thank you for the pointer and help :)
     

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  10. David the swarfer

    David the swarfer OpenBuilds Team
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    are you exporting the pdf from freecad?? CONTROL cannot read that. (or did you just create the pdf so you can upload it here?)
    Gcode is a plain text file, not a PDF.
    GRBL does indeed accept Gcode, you should read the Wiki so you know what you are dealing with. Knowledge is power!
    OpenBuilds CAM Gcode Creator - Public Beta will get you going with simpel designs and Gcode output.

    or maybe some googling will get you some stuff like this to learn from

    at 2:40 he selects the grbl_post to create GRBL firendly Gcode.
     
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  11. jltcet

    jltcet Well-Known
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    No it was just for the purpose of uploading to here
     

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