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Prusa i3 Bear Upgrade V2

Discussion in '3D printers' started by pek, Feb 8, 2018.

  1. pek

    pek Veteran
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    I do not recommend to integrate it to Z top. Z top is 0.2mm lower than top of v-slot for tolerances. And depending how you cut the v-slot and/or how you tight them, then you might twist the X axis a bit.
     
  2. pek

    pek Veteran
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  3. xequtor

    xequtor Journeyman
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    congrats, I was hoping you will win as this is the Bear Upgrade is a great build, I advertised your build also on last Live YouTube stream of CNC Kitchen as I'm admin on his stream (only admins can post links)

    and also I feel sorry for you :) with the PowerPack you will have to spend your free time designing and build stuff, I wanted years ago also build a desktop CNC but then 3D printing got better and cheaper.
     
    #213 xequtor, Mar 27, 2018
    Last edited: Mar 27, 2018
  4. pek

    pek Veteran
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  5. Michael.M

    Michael.M Veteran
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    Congratulations Pek! Now your going to build a Sphinx CNC router right? Haha
     
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  6. pek

    pek Veteran
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    Haha I was so many time close to buy everything for a Sphinx build (last time I was in contact with someone that could cut the plates for me) ! I love you design Kyo, simple and efficient!

    However, I have some idea in my head that I would like to give a try, something that I never seen here (maybe for a reason :D )
     
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  7. kabar03

    kabar03 Well-Known
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    Pek, a feature request if you have some time. Z motor mounts extended from frame to accommodate mgn12 rails? Also, X axis carriage with mgn12 rail mount on rear? I understand this could be a low priority for you. The step files do not import into Solidworks well. Is there an option to export on your end to a more friendly Solidworks file? I could possibly edit the parts myself then. I've not used Fusion 360 to be proficient in it. Thanks for any consideration.
     
  8. pek

    pek Veteran
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    This is definitely something I would like to work on it! I just do not want to make it quick and dirty, I like to take my time to develop things. I am currently getting more and more familiar with the X axis end extruder. Next feature will be improved X-ends (based on MK3 R2 design) and improved MK2.5/3 extruder which will also solve this issue : Filament path is not straight through Bondtech wheels · Issue #51 · prusa3d/Original-Prusa-i3

    The big next things will be an open source filtered case and a CNC !
     
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  9. xequtor

    xequtor Journeyman
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    @pek
    the Y axis bearings holders, do they have advantage over the U shaped screws from Prusa or just for people who do upgrade and use zip ties?
    I don't know if I should order them or use one you designed
     
  10. pek

    pek Veteran
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    I ahve not done any scientific comparison but too me they are better :
    • You have less chance to break the bearing compared to U bolt
    • Better repartition of the forces
    • If you take the time to perfectly align smooth rods, then you can screw them stronger (be careful to not exaggerate as the holes in aluminum carriage have sharp angles)
    • Less slop
     
  11. xequtor

    xequtor Journeyman
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    DO NOT order the cut V-Slot from Watterott, very bad cut quality and not precise cut +/- 1mm, now I regret I started with V-Slot and not ordered from Misumi
     

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