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CoreXY - e3d inspired

Discussion in '3D printers' started by j0achim, May 1, 2018.

  1. Aleksandar

    Aleksandar Journeyman
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    we need some news from you!!!!!!
     
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  2. j0achim

    j0achim Journeyman
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    Sorry for the extreme delay on updates.

    Here is a link the the project which anyone can download, keep in mind that this is highly experimental and still work in progress, I plan on making several changes to this tonight and re-cut top plate tomorrow.

    !! The current project files represent in no way the final product as I intend to share it. !!
     
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  3. j0achim

    j0achim Journeyman
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    Several changes to updated design.

    • Moving Z axis motor to the bottom.
    • More space without making the footprint considerably bigger, adding only a few cm to depth of the printer.
    • Room for additional 2-3 toolheads.

    Want to download the Fusion 360 project files, these can be viewed and downloaded here.

    Preview of new top-plate.
    Top Plate v2.png
     
  4. Aleksandar

    Aleksandar Journeyman
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    Hi j0achim,

    Thanks on supplied files. It looks good.

    You have used 20x60 profiles? Do you find them strong enough. I am still in doubt to go with 30x60 altough 20x60 should be strong.
    You used 6mm bottom and top plates?

    I would only change orientation of Z axis alu profile as they did on e3d as it carries more weigth that way.

    Give us more pics if available please.

    Thanks
     
  5. j0achim

    j0achim Journeyman
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    I will probably change the orientation of the Z axis profile on future revisions, that said that would require some belt rearrangement, or maybe change the Z post for a 30x60 profile would do the trick. Rigidity of previous version was very stable so we'll see how it goes.

    Unfortunately I burned my end mill during last cut, I did manage to salvage the top plate, though the finish is by no means as I would like, however for a prototype it does not matter.

    IMG_20190414_184433.jpg

    I have wasted a lot of time trying to 3D print to some mock-up carriage objects on my old CR-10S however the hot-end thermistor is borked so could not get temps under control, so I'll be cutting some pieces out of lexan for the carriage and get it moving.
     
  6. Aleksandar

    Aleksandar Journeyman
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    If you change orientation of Z profile put one set of pulleys behind it as tensioners and to avoid the profile itself.

    I was looking at prices of rails, 9 and 12 have almost same price on Aliexpress?
     
  7. j0achim

    j0achim Journeyman
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    I will definitely add a post in the middle for belts in future revisions.

    If I recall correctly E3D went with 9mm rails because of weight and precision. I don't know the weight difference between 9 and 12, but **** the 20 is heavy, and as we know it is all about keeping both friction and weight to a bare minimum, I even consider removing most of the crossbeam to reduce weight on the gantry, the rail itself is very sturdy and made of a highly hard steel.
     
  8. Aleksandar

    Aleksandar Journeyman
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    12 rails for Y and 20 for Z should be ok as they are stationary.
    For X, 9 with aluminium support seems fine.
    Z must be strong and stable.

    Keep up.
     
  9. j0achim

    j0achim Journeyman
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    Cut the sled out of aluminium, not perfectly assembled but will be replaced at a later time.

    IMG_20190421_135751.jpg IMG_20190421_144323.jpg IMG_20190421_144628.jpg
     
    Aleksandar likes this.

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