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    homemade 3d printer design help

    Hello all. I am new to 3d printing (only used one maybe a dozen times), and would like to build my own. However, I have little knowledge on how they are designed. so using my limited knowledge designed one in PTC creo. (Design files below, stl and creo) and I am wondering if my design is a good one. i am plenty capable of building one, i just want to make sure i got the design "correct".

    Click image for larger version

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    The frame of my design consists of aluminum extrusion from the company 80/20, specifically from their 10 series extrusions. (I.e. 1”x1”). all the gray "plates" are 1/8" alluminum or steal. i will assemble the frame without brackets, only using bolts. (not pictured)

    The linear rails I’m using measure in at 8mmx600mm, and the build plate (puke yellow color) is 500mmx500mm (the largest heated bed I could find), and is supported by the same alluminum extrusion as the frame.

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    The x/y axis are driven by three nema 17 stepper motors using belts, and the z axis is driven by a nema 23 stepper motor with a 8mm acme leadscrew. Yes I know that the z-axis motor is “floating”. I’m yet to decide how I’m going to mount it.

    For the extruder I plan on using the kraken quad filament water-cooled extruder. Pictured are the four 1kg spools (green), and the gray guide plates to guide the filament to the four boden steppers.

    further information: the frame stands about 36"tall, and the base about 30x25 inches. also, i want to limit the amount of 3d prints on the frame for "structure" to about zero. also the red extruder pictured is not size accurate at all. also my budget is about 500$, but lower is better because uncounted for costs always occur on these kinds of projects. also the two nema 17 brackets with the idler pulleys will be redesigned, but i'm not sure with what right now.

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    I have two main questions. (1) What controller should I use? I’ve looked at the skr pro and the duet, but need something capable of controlling 8 steppers. (2) Being new to 3d printer design, does my design look correct? Are there any problems you see, or things I could improve whilst still in the design phase? any knowledge you've gathered from your own attempt?

    If anyone needs further clarification on my design or more pictures, feel free to ask!

    Here is a link to my design files (both stl and creo assembly): http://www.mediafire.com/file/ctcmp3...nt_v1.zip/file

    Thanks!

    #2
    this might not be the best place to be asking about this, so ill post it to other forums too, however i figured i had better post an update here. i have changed the above design alot. i have a good amount of experience with cnc mills and lathes, but not 3d printers, so the above design had more in common with those than it does with actual 3d printers. so i redesigned it.

    HERE IS MY NEW X/Y AXIS:


    the "new" x/y axis uses 4 600mm x 8mm linear rails and 2 700mm x 8mm rails for the center. the plates measure 3" x 3". the center "head" (black) is a temporary mock-up, as i ultimately want to mount a kraken extruder there.



    the size of the machine has changed as well. i want my 3d printer to be floor standing, so this "new" frame design measures in at roughphly 29 x 27 x 54inches, not including the planned leveling feet, which will add and extra 5-6inches in height. the print area measures in at 500mm x 500mm x 1000mm, but of the 1000mm height only about 900mm is actually usable. the z-axis rails are now 12mm supported rails, and driven by a nema 23 stepper motor, which for now is just floating. the z-axis rod is an 8mm acme rod measuring in at 1000mm, and supported by two bearing blocks.

    The frame of my design consists of aluminum extrusion from the company 80/20, specifically from their 10 series extrusions. (I.e. 1”x1”). all the gray "plates" are 1/8" alluminum or steal. i will assemble the frame without brackets, only using bolts. (not pictured)



    this design uses a total of 9 (yes 9) stepper motors. 4 for the boden, 4 for the x/y, and 1 for the z.

    For the extruder I plan on using the kraken quad filament water-cooled extruder. Pictured are the four 1kg spools (green), and the gray guide plates to guide the filament to the four boden steppers.

    I have two main questions. (1) What controller should I use? I’ve looked at the skr pro and the duet, but need something capable of controlling 9 steppers. (2) Being new to 3d printer design, does my design look correct? Are there any problems you see, or things I could improve whilst still in the design phase? any knowledge you've gathered from your own attempt?

    If anyone needs further clarification on my design or more pictures, feel free to ask!

    Here is a link to my design files (both stl and creo assembly): https://www.mediafire.com/file/067yy...nt_v2.zip/file

    Thanks!

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