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Drag knife question

Discussion in 'CNC Mills/Routers' started by artfuturo, Feb 25, 2018.

  1. artfuturo

    artfuturo Well-Known
    Builder

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    Hi guys

    I have a question about drag knives. I am in the process of building a Workbee and among a lot of other things, I will be cutting wood veneer, very thin slate veneer (0.3-0.5mm slate on 0.5mm cotton & glue backing) and leather and probably some vinyl as well. After some research, I realised that the typical vinyl knife won't cut it with thicker materials like leather (up to 3.5mm).

    The only solution I came across consistently that seems to be capable of dealing with my rather diverse requirements was the Donek drag knife. It appears very well established, there is a lot of experience in integrating it into Vectric SW (which I am using) and it has aides to adjust the g-codes to cater for the directional moves that are very specific.

    There is only a little catch - it is very expensive, roughly about £230 if I purchase it from a UK dealer and about $294 if I buy it directly in the US.

    My questions:
    • Has anybody in this forum used a Donek knife? What materials did you cut? What were the experiences?
    • What tools did you use to adjust the g-codes for the directional changes?
    • Are there alternatives with similar capabilities that are cheaper?

    Thanks very much for any feedback.

    Cheers
    Phil
     
  2. Kyo

    Kyo Master
    Staff Member Resident Builder Builder

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    Knifeassy.jpg

    Hello Phil, hit up Brain for his Drag Knife files "Here". Cheaper then a good cup of coffee and free to make if you have the right scrap :thumbsup:. It is one of the projects I want to get to this year myself. I mostly want it for cutting leather and custom boxes / packaging. He has a series of videos on how to make it as well.
     
  3. artfuturo

    artfuturo Well-Known
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    Hi Kyo

    great feedback, thanks. Do you know how you have to adapt the g-codes with this knife? Do you do it in the same way as you would do it with a Donek? Is the geometry the same as a Donek?
     
  4. Gary Caruso

    Gary Caruso OpenBuilds Team
    Staff Member Moderator Builder

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    Estlcam has build in feature for drag knife, i have not tried it yet, but plan on soon.
     
  5. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder

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