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Thread: CNC Router

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    Supporting Member editor@glue-it.com's Avatar
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    editor@glue-it.com's Tools

    CNC Router

    Hi All,

    Building a small traction engine and I wanted to engrave the words around the smokebox door and for the main badge, so thought I would dip my toe into the world of CNC and bought a CNC engraver/router. OK it is very cheap and might not be up to the job, but this is a steep learning curve for me as only ever used manual machines before this point. I bought a Sain Smart CNC Router 3018-Pro.

    So, here is a video of the kit arriving and me assembling the machine. Will share more as I learn.



    Now I'm learning about G-Code, tool paths and how to set up the machine for different materials.

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    Home-PC (07-25-2020)

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    editor@glue-it.com's Tools
    The only thing I've found lacking with the package are the table clamps, the extruded aluminium table is lovely. The T-nut is the head of a bolt that will damage the grooves over time and just don't seat that well. My thoughts are to make a set of brass T-nuts that engage with the underside of the groove, spread the load and don't over time dig into the surface.
    CNC Router-cnc-clamps-01.jpg

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    editor@glue-it.com's Tools
    So, I've made T-nuts (a recurring theme here) for the Sain Smart Genmitsu 3018-Pro engraver/Router.

    Trouble was I didn't have the right size square bar...so I machined 3/4 inch diameter mild steel round bar into square:

    CNC Router-cnc-clamps-03.jpg

    and eventually got to square

    CNC Router-cnc-clamps-04.jpg

    and I ended up with six 14.4mm square nuts

    CNC Router-cnc-clamps-05.jpg

    and they fit superb, will have to create a quick drawing for others to use

    CNC Router-cnc-clamps-06.jpg

    The drawings might not happen, hence dimensions: The T-nuts are 14.4mm across, the square nut is 6mm high and has an 8mm diameter boss protruding 2mm from the top. The nut is threaded 6x1mm. They are threaded the whole way through the nut.

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    Altair (07-29-2020), Carnel (07-25-2020), Home-PC (07-25-2020), Jon (07-24-2020), old_toolmaker (07-25-2020), Rocconet (07-25-2020), Tonyg (07-25-2020)

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    Thanks editor at glue-it.com! We've added your CNC Router Table Clamps to our CNC category,
    as well as to your builder page: editor at glue-it.com's Homemade Tools. Your receipt:




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    editor@glue-it.com's Tools
    Spent some time yesterday using different cutting bits to see if I could engrave brass

    CNC Router-engraverendmillslotdrill.jpg

    At the moment I don't have a solution that allows me to engrave brass with the Genmitsu 3018-Pro. I might try some smaller bits, but spindle stiffness and runout appears to be a fundamental weakness.


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