CNC Router Machine Arm

thingiverse

This is a machine arm I made for my Avid CNC router. It mounts to either side of the machine, and you can use any size 4080 extrusion you want. I made my arm using a 60" upright, two 24" 'arms' and a 16" brace. You can adjust these to suit your needs! The hinge mechanism consists of the top pivot, and the bottom 'main' piece. Brass oilite bushings and thrust washers support everything and make it swing freely. Here is what hardware is needed: Shoulder Bolt (main hinge) - https://www.mcmaster.com/91259A723/ Flanged Bearing (short, hinge) - https://www.mcmaster.com/6338K423/ Flanged Bearing (long, main body) - https://www.mcmaster.com/6338K424/ Thrust Bearing (1/8") - https://www.mcmaster.com/5906K514/ Thrust Bearing (1/16") - https://www.mcmaster.com/5906K513/ Nylon Lock-nut - https://www.mcmaster.com/90630A121/ M8 Countersunk - https://www.mcmaster.com/91294A282/ Assorted Fender Washers - https://www.amazon.com/gp/product/B07R4WNPMB/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=robertcowandi-20&linkId=950eef67f35a912d8b5e8a2d4e67b5a9&language=en_US The M8 countersunk screws are use for the endcaps and most of the attachments. The nylon lock-nut adjusts the tension of the hinges. The shoulder bolt acts as the main shaft/hinge and is supported by the flanged bearings, with the thrust washers sandwiched between them. I included 1/8" and 1/16", depending on the tolerances of your printer. The assortment of fender washers help distribute the load against the 3d printed parts, and are used throughout. Everything prints fine without supports except for the two hinge parts. They need supports for the lip for the flanged bearings. Print these with that face down, and add supports. In-fill can be as low as 15%. I use a Planar touchscreen monitor, and I love it. It's a great value for the price, and works very well. https://www.amazon.com/gp/product/B07R4WNPMB/ref=as_li_ss_tl?ie=UTF8&psc=1&linkCode=sl1&tag=robertcowandi-20&linkId=950eef67f35a912d8b5e8a2d4e67b5a9&language=en_US For cables, 10' should work, as long as your computer is relatively close. If it's further away, you will want longer. But 10' was perfectly fine for me, and I had a couple feet extra, even when running through the channel. Check the video for the whole run-down of the project and better detail on construction! Check out my other 'things' for the monitor mount, or use your own.