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Prusa i3 (Acrylic frame with OB rods)

Discussion in '3D printers' started by dddman, Feb 6, 2015.

  1. dddman

    dddman Master
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  2. Robert Hummel

    Robert Hummel Custom Builder
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    Build is complete :)
    Special thanks to dddman for the printed parts to get me running.
    Here are some pics :)

    The completed printer :)
    image.jpg

    After giving the printer to my little princess, look out she has a frog army! :p
    image.jpg

    Card holder for the wife :thumbsup:
    image.jpg

    And a close up of the frogs print :)
    image.jpg
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    MaryD, Mopar32985, GrayUK and 4 others like this.
  3. Robert Hummel

    Robert Hummel Custom Builder
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    12 hr plus print in PLA :D
    image.jpg
     
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  4. Tweakie

    Tweakie OpenBuilds Team
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    Excellent work Robert. :thumbsup:

    Tweakie.
     
  5. Robert Hummel

    Robert Hummel Custom Builder
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    Ty bud!

    Here's my custom heatbed I designed in sketchup, milled and then added a layer of cork then aluminum tape as a insulating layer in attempt to have a faster heating time :)
    image.jpg
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  6. Jason Farley

    Jason Farley Well-Known
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    Forgive my ignorance but is what I am seeing above a copper coated board (circuit board blank if you will) milled to create the heat "grid". Then backed with cork and covered with aluminum tape?

    Does the copper "circuit" have the required resistance to generate the heat required for the bed?
     
  7. dddman

    dddman Master
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    The traces are based on the Prusa board design
     
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  8. JustinTime

    JustinTime Master
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    Isn't the cork acting as an insulator and preventing the heat to get to the top?
     
  9. dddman

    dddman Master
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    The board is upside down (the cork will go under. It's meant to concentrate the heat to the top (no loss from ambiant air)
     
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  10. Robert Hummel

    Robert Hummel Custom Builder
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    Yes and yes again :)
    It's resistance is 3.5 ohms
    This is simply an experiment in hopes of good results :nailbite:
     
  11. Jason Farley

    Jason Farley Well-Known
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    Very nice. I will be watching to see your results. I need a larger size bed for a project and anything over 12" x 12" starts getting pretty expensive. Copper clad board can be be found pretty darn cheap and I could see a scenario where linking several boards together would be easy.

    Did you use 1oz or 2oz board for your design above?
    I assume your are putting a sheet of Borosilicate on top of the exposed copper grid. Is that correct?

    Keep up the good work!
     
  12. Robert Hummel

    Robert Hummel Custom Builder
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    Not sure of the oz count as I picked up the clad as you said cheep at my local surplus.
    $16 for a 300x300 sheet
    I will be putting regular temped glass or mirror, will see what the glass cutter three doors down has on hand
     
  13. Robert Hummel

    Robert Hummel Custom Builder
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    Here it is for now, mounted with tempered glass
    image.jpg
     
  14. Mopar32985

    Mopar32985 Veteran
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    Looks great cant wait to hear how the heated build plate works
     
  15. Robert Hummel

    Robert Hummel Custom Builder
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    The frame files are done :D
     

    Attached Files:

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  16. JustinTime

    JustinTime Master
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    Robert, how does the heater bed that you made works out?
     
  17. Robert Hummel

    Robert Hummel Custom Builder
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    I'm assembling and wiring the OBi3 now :D
    image.jpg
    I just finished the mechanical part of the build last night.
    Will be testing real soon :thumbsup:
     
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  18. Mopar32985

    Mopar32985 Veteran
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    Hey guys very excited to get my build going thanks again Robert for cutting the frame plates for me. Any idea when a parts list will be up excited to get all the goodies together!
     
  19. dddman

    dddman Master
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    I'll work on it tonight :)
     
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  20. Mopar32985

    Mopar32985 Veteran
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    dddman great man thanks the prints coming off this printer are looking great
     
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  21. Robert Hummel

    Robert Hummel Custom Builder
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    No prob :)
    Frame is packed and ready to ship
    I really like the Blue :)
    image.jpg
    I also picked up a neon orange that glows real bright when the light hits it :)
    image.jpg
     
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  22. Mopar32985

    Mopar32985 Veteran
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    Awesome cant wait to get to building it!
     
  23. Robert Hummel

    Robert Hummel Custom Builder
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    Here are a few pics of the parts I'm printing for others :)
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    image.jpg
     
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  24. Mopar32985

    Mopar32985 Veteran
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  25. dddman

    dddman Master
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  26. Robert Hummel

    Robert Hummel Custom Builder
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    Be sure to use net fab to fix the error in the stl from thingverse
     
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  27. dddman

    dddman Master
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    BOM has been posted, minus the screws :) It's hard to measure screwed screws, but I will update it soon :) I added the .stl for the bed holder and the extruder (fixed with netfabb)
     
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  28. Mopar32985

    Mopar32985 Veteran
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  29. dddman

    dddman Master
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    I have to try it!!!
     
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  30. Mopar32985

    Mopar32985 Veteran
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    if it works like i have seen in youtube videos it will get rid of what i think is the hardest part of 3d printing
     

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