Welcome to Our Community

Some features disabled for guests. Register Today.

      1. Build Progress:
        • Build in Progress...
      Rate This Build
      2 votes
      IMG_20151129_144457.jpg IMG_20151129_144510.jpg IMG_20151129_144526.jpg IMG_20151129_144925.jpg IMG_20151129_145517.jpg IMG_20151129_145534.jpg IMG_20151129_145616.jpg IMG_20151129_145807.jpg IMG_20151129_145821.jpg [ I started messing around with 4th axis, trying to fit it into my ox.. That was a failure, mostly because of my shortcomings. I decided to start from scratch after I saw the openbuilds C beam machine.
      I don't have any skills with drawing programs, so this was all done on the fly. Design as you go!

      I decided to build it using the CBeam as a basis. I basically wanted to be able to turn about half a metre, because I really want build a statuette of the young lady about 2 feet tall! I saw it being done somewhere on you tube, but I can't remember where.

      I bought packages from openbuilds just changing the length to 1 m and leaving the Z the same.
      A big problem with doing design on-the-fly in Australia is that it's a long way from any spare parts I may need! I had built a large 3-D printer so I had a lot of extrusion when I pulled it apart. Anything I needed had to come from that, plus the 2 kits for the X and Z.

      The Index chuck & tailstock came from eBay. The chuck is a 3 jaw centering chuck. I should have had a 4 jaw chuck, but I didn't! It's driven by a nema 23 with a belt & pulley drive at 6:1.Both it & the tailstock have a 40 mm wide slot, 3 mm deep, in the base, so I got an aluminium bar 40*3*1000 mm to use as a guide to keep them aligned. Haven't quite figured out how to handle moving the tailstock, but I am leaning toward having 3 or 4 sets of holes to bolt it into the range of the tailstock adjustment, to suit a requirement for a job. Open to suggestions there!

      The parts duly arrived a few weeks ago and I got stuck into it. The Bundle packs are great! I imitated the mounting posts from CBeam, but then used whatever I had to fabricate the rest.
      Hopefully my attempts at photography will help explain what I've done.
      I strengthened the old computer desk put an extra 20 mm mdf on the top. I will bolt it all down, then wire it up, hopefully using the XPRO card.

      I use Vectric software to prepare code & Grbl controller to drive it. XXXXX Wrong! Wrong!

      Note my joins for the longer extrusions!

      Finally figured out how to mount the chuck & tailstock. It's all bolted down & the X axis is parallel! Wow, that was my biggest worry, but it turned out to be quite easy. The photos show it well? I used a 2 mm round end bit in the router, a 90 degree v bit in the chuck. The point of the v bit & the tailstock were in the flute of router bit. There is probably a cleverer way to get there, but that's it for now.
      I got just on 500 mm between points. It would be relatively easy to move the chuck & tailstock outside the existing frame to get a lot more, but it would be too unwieldy , plus I doubt the strength of this setup would handle it

      Sorry this is a bit messy. I couldn't get the update photos to go with the others!

      Discovered GRBL doesn't handle 4th axis. This meant a big change! Replaced XPro card with an AKZ250 from eBay and the free GRBL with Mach3. After a lot of heartache setting up, it is now working very well. So far, turning 70 mm square into 68 mm beautiful round stock with basic Vectric exercises. As soon as I have a presentable model completed, I'll show it off here.

      Attached Files:

  • Loading...
  • Build Details

    Build License:
    • CC - Attribution Share Alike - CC BY SA

    Inspired by

    Openbuilds CBeam router
  • Parts list

    Qty Part Name Part Link Comments
    2 CBeam linear actuator bundle http://openbuildspartstore.com/bundle-packs/?sort=bestsel... Link One 250mm & one 1000mm
    1 CNC Engraving Router Rotational A 4th Axis http://www.ebay.com.au/sch/sis.html?_nkw=CNC+Engraving+Ro... Link CNC Engraving Router Rotational A 4th Axis 3 Jaw 100mm Chuck+65MM Tailstock
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice