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Belt-less 3D Printer ?

Discussion in '3D printers' started by BobenhamHotspur, Feb 4, 2016.

  1. BobenhamHotspur

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    Hi.

    I've not read every post on the site but I've yet to find a 3D printer design that does not use drive belts.
    Is there a reason for this?
    Anyway, I've designed a printer that only uses acme threaded rods for all of the movement.
    What are the flaws with my design?

    Your feedback would be much appreciated.

    Bob

    upload_2016-2-4_21-1-52.png
    upload_2016-2-4_21-3-34.png
     
  2. BobenhamHotspur

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    Two more views

    upload_2016-2-4_21-9-41.png
     
  3. BobenhamHotspur

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    @JustinTime - many thanks for the reply. I did some research today and found that using the openbuilds 8mm rods my esteps would be 400 rather than the 200 needed for a GT2, so it's half the speed. Although slower, is this a usable rate? Looking at the maze of belts needed to active the same motion it seems overly complicated, even if it's faster.
     
  4. Adam Filipowicz

    Adam Filipowicz Veteran
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    with your setup you are using two steppers for Y and 1 for X. best to keep each axis limited to a single stepper to eliminate sync issues
     
  5. BobenhamHotspur

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    I did originally design a version with only one motor driving the y-axis but I was worried that when it was at the end of the axis it might exert unequal force on the x-axis. Using two driven in parallel? will hopefully avoid sync issues.
     
  6. Ryan James

    Ryan James Journeyman
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    Use a belt to drive the second screw. Pulley on one side with a belt running from the top (or bottom) running to the second screw. No sync issues then. I know you're wanting to avoid belts but that is a fairly simple setup.
     

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