Welcome to Our Community

Some features disabled for guests. Register Today.

      1. Build Progress:
        • Build in Progress...
      Rate This Build
      0/5,
      0 votes
      As I've pondered making an OB 500mm gantry CNC, but trying to save money for a good quality steel mini mill like a pre-owned Jet or Grizzly, I saw the OB MiniMill posted last month and just went after it including NEMA 23 motors. I bought a DW611 from Amazon including the plunger, because I will end up purchasing a purpose built spindle and use the palm router for woodworking.

      I spent about 3 hours total assembling the bundle, finishing yesterday, and it was refreshing and calming compared, say, to the intake manifold rebuild and A/C replacement on my BMW Z4 I just finished doing.

      I had researched the smoothieboard v1.1 for a few months and after seeing the Hackaday article about microstepper accuracy, I decided on the Allegro drivers, so the integration of the newer Allegro A5984 and versatility of smoothie for future projects like laser engraving made my mind up.

      So, I noticed today, after going on a shopping spree last night, I ended up with a small issue: the SmoothieBoard only handles 2.0A peak, and the NEMA 23 motors with the OB bundle are 2.8A peak... I assume the overload would have been a terrible mistake.

      Soooo, rather than buy 3 external drivers that won't fit in the enclosure I have, I went for the same Mototech stepper motor design that is sold in 2.0A from SMW3D, model MT-2303HS200AW. So I have the MT-2303HS280AW-OB motors for later, when I build actuators with ballscrews for a 500mm gantry, I'll use them.

      I also decided on 24V for the possibility of running a 300W spindle with it later.

      I am now contemplating my control panel - I will have an e-stop, I will rewire the DW611 to accept an external speed control with LED readout; it will be controlled manually or digitally with a motorized fader out of a sound mixer with the same range of resistance, controlling the speed using software will move the fader (I couldn't find a motorized knob pot that had the correct specs or ability to control the motor/DRO within CNC software, so the slider should be a cool alternative). I like blue LEDs, so there will be many.

      Once the electronics are here and connected, I'll put up a video. Very excited to start testing the capabilities and accuracy to build an even better, more precise machine next.

      Attached Files:

      Anthony Bolgar and Sonny Lowe like this.
  • Loading...
  • Build Details

    Build License:
    • CC - Attribution - CC BY

    Reason for this Build

    Why wouldn't I??
    Vehicle parts, custom firearm accessories, furniture and decor, custom tooling

    Inspired by

    OpenBuilds MiniMill Mark C
  • Parts list

    Qty Part Name Part Link Comments
    1 OpenBuilds MiniMill Bundle http://openbuildspartstore.com/openbuilds-minimill/ Link with 3 NEMA 23 motors (2.8A)
    3 NEMA 23 MT-2303SH200AW https://www.smw3d.com/nema-stepper-motors/ Link NEMA 23 (2.0A)
    1 SmoothieBoard 4x v1.1 -xC https://shop.uberclock.com/collections/smoothie/products/... Link Completed 4x Controller Board
    1 Mean Well 24V 14 LRS-350-24 Switching Power Supply https://www.amazon.com/gp/product/B013ETVO12/ref=oh_aui_d... Link
    1 AC power socket with fused illuminated switch IEC https://www.amazon.com/gp/product/B00ME5YAPK/ref=oh_aui_d... Link
    1 Spindle LED array http://openbuildspartstore.com/spindle-router-led-light-r... Link Awesome.
    6 Micro limit switches with mounting plates http://openbuildspartstore.com/micro-limit-switch-kit-wit... Link
    1 IEC 6' power cord http://openbuildspartstore.com/6-ft-power-cord/ Link
    0 Link
  • About Us

    The OpenBuilds Team is dedicated helping you to Dream it - Build it - Share it! Collaborate on our forums and be sure to visit the Part Store for all your Building needs!
  • Like us on Facebook

  • Support Open Source FairShare Program!

    OpenBuilds FairShare Give Back Program provides resources to Open Source projects, developers and schools around the world. Invest in your future by helping others develop theirs!

    Donate to FairShare!