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Voxel OX 3D Printer

Discussion in '3D printers' started by Marshall Peck, Sep 27, 2015.

  1. crispin

    crispin Well-Known
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    Yes!
     
  2. Craig Anderson

    Craig Anderson Journeyman
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  3. knabo

    knabo Well-Known
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    I finally finished my Voxel Ox build. Here are some pictures:
    IMG_2066.JPG IMG_2067.JPG IMG_2068.JPG IMG_2069.JPG IMG_2070.JPG IMG_2065.JPG
     

    Attached Files:

    crispin likes this.
  4. Craig Anderson

    Craig Anderson Journeyman
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  5. Craig Anderson

    Craig Anderson Journeyman
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    When I built mine, I considered a single motor z axis. Lately I have experienced layer problems utilizing 2 color printing. No problem with single color, two color requires a lot of z axis movement. So one variable is the Z axis dual motors staying in sync. I test them with a block off of the edge of my build plate. I am seeing variations, but don't know why. One issue may be my moving the z axis as I load and unload my twin Bowden extruders which are mounted on the z axis support. Another is the fact that if you turn your machine off and on you run the chance that one of the motors will zero differently.
    So I have been engineering a simple and realistic method to convert my machine to a single motor dual lead screw machine. After some thought, I decided to keep the lead screw flexible connector and bearing. Placing a belt pulley directly on the top of the lead screw will put a bending moment on the screw when the belt is tightened. My design leaves the flex connector and adds a 5mm shaft upward that is supported by two 16 x 5 x 5 mm bearings. The 20 toothed pulley will be pushed up against the first bearing and this will provide thrust support in both up and down directions. The design will bolt into the same position as the current lead screw brackets. I call them my Z towers and I will need both a left and right side version.
    I plan on mounting the single motor shaft down on a plate that will mount to the 20 x60 mm upper extrusion. With four idler pulleys, I can use the motor as the tensioning device on the closed belt. Here is a picture of the right side tower.
     
  6. knabo

    knabo Well-Known
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    I'm not seeing too much z axis variation between the two motors. I check it once a month or so. That being said, a single motor solution that can drive both sides would be interesting..

    Don't see your picture...
     
  7. Craig Anderson

    Craig Anderson Journeyman
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  8. JustinTime

    JustinTime Master
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    Is this some kind of a spam?
     
  9. Craig Anderson

    Craig Anderson Journeyman
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    Here are the pictures
     

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  10. Craig Anderson

    Craig Anderson Journeyman
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    No spam, Photobucket has raised their rates.
     
  11. Craig Anderson

    Craig Anderson Journeyman
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  12. Craig Anderson

    Craig Anderson Journeyman
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    I am having trouble measuring the belt length. It will look like the drawing above.
     
  13. Grantman

    Grantman Veteran
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    What belt will you be running? Pitch will determine belt length around a 20T pulley - 2mm x 20T = 40mm of belt to wrap one pulley. You have 2.5 wraps total - 2.5 x 40mm = 100mm (3.93") of belt plus the total of all your straight runs.
     
    Anthony Bolgar likes this.

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