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Live OpenBuilds MiniMill -> MiniPrint Conversion Demo @ MRRF2019

Discussion in '3D printers' started by obmilllivebuild, Feb 21, 2019.

  1. obmilllivebuild

    obmilllivebuild Well-Known
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    obmilllivebuild published a new build:

    Read more about this build...
     
  2. MaryD

    MaryD OpenBuilds Team
    Staff Member Moderator Builder

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    Looks great. Can't wait to see the outcome!
     
  3. Mark Carew

    Mark Carew OpenBuilds Team
    Staff Member Moderator Resident Builder Project Maker Builder

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    Looking really great @obmilllivebuild :thumbsup: Can't wait to see the Triple Threat in action
     
  4. MatthewWeems

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    If I mod this to dual extruder do you have an idea whether the 2 motors will be too heavy on the stepper or cause a lot of wear on the rod?
     
  5. obmilllivebuild

    obmilllivebuild Well-Known
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    I would think that the Nema 23 motor and acme screw on the Z is more than capable of moving a dual extruder system (it handles the Bosch / Dewalt routers quite easily). If someone really wanted to use this as a full time 3D printer, I would suggest increasing the lengths of the Z C-beam by 100mm. To get a 100x100x100 build volume, you would actually need to increase the X C-beam by at least 50mm also.
     
    MaryD likes this.
  6. MatthewWeems

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    Thanks for the advice!

    I am in the process of increasing the lengths of the z and x axis of the minimill and adding some extrusion on the sides to stabilize the machine. However, I was also wondering:

    Is there any advantage to keeping the milling format vs. converting to the the c-beam machine format? I assume there is a reason why milling machines are so prevalent over the wide format machines.

    Sorry for the basic questions, I'm fairly new to the maker community.

    Have a good one!
     
  7. obmilllivebuild

    obmilllivebuild Well-Known
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    I assume you mean the C-Beam Machine's gantry style versus the XY table style. The XY table style is pretty stable in small format. The gantry can be harder to keep the Z rigid enough as the span increases, but is really the only way to get to large formats. So, if you need a compact system, the XY table style is simple to build and reliable. If you need larger formats, it is important to make the side plates of the gantry strong and rigid and the beam needs to stay straight across its length and not twist / pivot against the spindle forces.
     

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