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Prusa i3 Bear Upgrade V2

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

Prusa i3 Bear Upgrade V2

Prusa i3 Bear Upgrade V2

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

Stronger frame for Prusa i3 MK2(s), MK2.5 and MK3 3D printer

prusa i3 MK2 MK2s MK2.5 MK3 frame upgrade mod modification bear haribo zaribo manual documentation POWERPACK_ENTRY
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  1. jay3D

    jay3D New
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    NICE.... :thumbsup::thumbsup::thumbsup:

    Pretty much what I had in mind with the Bear Upgrade. :D
     
    #31 jay3D, Feb 23, 2018
  2. xequtor

    xequtor New
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    here is my take to make it fit Misumi 20x40 extrusion as Vslot is not everywhere available and the cuts are not as precise as from Misumi.
    Problem I had is the chamfer, looks like left and right is inconsistent but after printing with 0.35 layer it does not matter, it is tight fit, cannot be inserted from the extrusion side, hast to be slided from the top.
     

    Attached Files:

    #32 xequtor, Feb 23, 2018
    Last edited: Feb 23, 2018
  3. pek

    pek Journeyman
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    Did you do that in Fusion 360?
     
    #33 pek, Feb 23, 2018
  4. xequtor

    xequtor New
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    yes, using your STEP file
     

    Attached Files:

    #34 xequtor, Feb 23, 2018
  5. pek

    pek Journeyman
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    What you can do is to import the source file in Fusion 360 format : src/prusa_i3_bear_full_upgrade_mk3.f3z . Then you will have access to all parts, sketches and parameters. This will be easier to use. Are you knew to Fusion 360?

    Be careful with parts printed vertically, like rod holders. Double check the rail profile dimensions after printing.

    BTW, the difference of your chamfers will not be visible when printing (but it will avoid elephant foot issue, which is why I add these chamfers in some particular places).
     
    #35 pek, Feb 23, 2018
  6. xequtor

    xequtor New
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    ahh, thanks, did not see the prusa_i3_bear_full_upgrade_mk3.f3z file, the

    I'm not new to F360 but I come from "different" world. Pro/E and MasterCAM
     
    #36 xequtor, Feb 23, 2018
  7. pek

    pek Journeyman
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    Ok perfect. Let me know if you are blocked.

    Tip : In this part, I am doing to a "sharp angle" on the corner of the extrusion. This will avoid plastic taking a shortcut while printing, which could then crack when you tight it. You can do the same technique on the inside angles of your "ergot".
     
    #37 pek, Feb 23, 2018
  8. xequtor

    xequtor New
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    the prusa_i3_bear_full_upgrade_mk3.f3z is the half upgrade, not full
     
    #38 xequtor, Feb 23, 2018
  9. pek

    pek Journeyman
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    hahah w.t.f, I will check that :ROFL:
     
    #39 pek, Feb 23, 2018
  10. pek

    pek Journeyman
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    #40 pek, Feb 23, 2018
  11. xequtor

    xequtor New
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    ahh, missed the dev branch, thx
    much better now, don't have to reinvent the wheel :)
    but still have to edit most of the parts.
    Looks like you invested lot of time in it, respect!
     
    #41 xequtor, Feb 23, 2018
  12. xequtor

    xequtor New
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    did you use only M5 for mounting the parts?
    I'm ordering some parts for the build
     
    #42 xequtor, Feb 23, 2018
  13. pek

    pek Journeyman
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    yes way too much :D

    It is not build only for me but to be reproduced by lots of makers. And it is a base for other idea I have!

    For bolting printed parts to extrusion yes. For mounting Prusa components to the printed parts you will need few other screws. Check out the Full Upgrade MK3 BOM here : prusa_i3_bear_upgrade/bom.md at dev · gregsaun/prusa_i3_bear_upgrade · GitHub
     
    #43 pek, Feb 23, 2018
  14. xequtor

    xequtor New
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    I may go for the V-Slot insted of Misumi extrusion, have to reconsider.

    The only think I cant get ist the power panic modul for MK3, BUT alle info I need is on github GitHub - libxmike/MK3_Power_Panic
    I may order 10-20 PCB to make it, I dont feel like ordering the MK3 power suply from Prusa for 80 EUR just for the power panic modul which will cost maybe max. 5EUR
     
    #44 xequtor, Feb 24, 2018
  15. pek

    pek Journeyman
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    Wise decision :D . I do not know where do you leave but if you would like to have precise cut checkout RepRap 3D Printer Parts Supplier - V-Slot CNC - Ooznest . Here is a list of shop selling V-Slot : prusa_i3_bear_upgrade/openbuilds_stores_list.md at dev · gregsaun/prusa_i3_bear_upgrade · GitHub

    The most important cut is the 290mm v-slot for the top. For other length, 0.2mm margin is more than enough.

    Do you already own a 24V power supply?
     
    #45 pek, Feb 24, 2018
  16. xequtor

    xequtor New
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    I'm in germany, in Belgium they cut with accuracy in the range of 0.5-0.6mm
    The pre-cut V-Slot in UK shop for full MK3 upgrade runs for about 80 EUR incl shipping, Misumi 35 EUR, so I dont know.

    I do have new 24V PSU from MeanWell which was ment for Ultimaker Alu build but had small PSU and did not used heat bead
     
    #46 xequtor, Feb 24, 2018
    Last edited: Feb 24, 2018
  17. pek

    pek Journeyman
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    #47 pek, Feb 24, 2018
  18. pek

    pek Journeyman
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    Yes shipping and taxes are very high, same problem for my country. You do not have high shipping cost/taxes if you purchase from Belgium?

    I cannot purchase from Misumi because I need to be a company...

    Maybe you can ask if they can do more accurate cut (and even propose a bit of extra money). I suspect they gives this margin "just in case" but it is quite easy to go under 0.5mm...
     
    #48 pek, Feb 24, 2018
  19. pek

    pek Journeyman
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    #49 pek, Feb 24, 2018
  20. xequtor

    xequtor New
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    #50 xequtor, Feb 24, 2018
  21. xequtor

    xequtor New
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    the MK3 full upgrade vertical V-Slot profile, is it 356mm or 354mm?
    according to BOM it is 356mm but in F360 it has 354mm
     
    #51 xequtor, Feb 25, 2018
  22. pek

    pek Journeyman
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    Are you sure you have the latest version of source file? The last version is 359mm. But you were right, BOM was wrong with 356 instead of 359mm (I have fixed it).
     
    #52 pek, Feb 25, 2018
  23. xequtor

    xequtor New
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    I have the source from few days ago, will get the new one
    will the 359mm stay? i may order the set today if the chinese seller will drop the shipping price
     
    #53 xequtor, Feb 25, 2018
  24. pek

    pek Journeyman
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    Should stays but as I explained I could not build the MK3 full upgrade as I do not have the chance to own one!
     
    #54 pek, Feb 25, 2018
  25. xequtor

    xequtor New
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    ok, if you need some dimension from the MK3, let me know I have the original MK3.
     
    #55 xequtor, Feb 25, 2018
  26. pek

    pek Journeyman
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    #56 pek, Feb 25, 2018
  27. jay3D

    jay3D New
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    Just checked the suppliers for tolerances:
    - Belgium: 0.5-0.6 mm
    - Italy: 0.5 mm
    - Portugal: unknown
    - UK: 0.2 mm
    - Poland: do they even sell pre-cut 2040? only found the kit.
    - Canada: 1.0 mm :jawdrop:

    I guess I will order in UK than. :)
     
    #57 jay3D, Feb 25, 2018
  28. xequtor

    xequtor New
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    can we use instead of 359 mm, 360 mm ?
     
    #58 xequtor, Feb 25, 2018
  29. pek

    pek Journeyman
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    Looks like I have to create my store :D

    For Poland, they only sell a pre-cut kit for half upgrade (for now, maybe they will sell full upgrade after the official release...)

    Sure, no problem, nothing to adapt! You will just have 1.2mm on top of the z_tops. The 290mm v-slot will be higher by 1mm as well, which is not a problem.
     
    #59 pek, Feb 25, 2018
  30. xequtor

    xequtor New
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    I dropped the idea ordering V-Slot extrusion from china, set will cost $52.05, parts $14.50 and shipping $37.55, who know what the cut quality be. Will order in UK, the extra 20 EUR is OK the get is in better quality

    I will order bei Aliexpress just the bolts, nuts and corner brackets as they are much cheaper as in UK or EU
     
    #60 xequtor, Feb 25, 2018
    Last edited: Feb 25, 2018
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