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For his final project in the course How To Make (almost) Anything, David Carr designed and built this
3-axis CNC milling machine
. It’s probably not the most precise or powerful device, but it costs less than $90 to build, and can mill PCBs, wood, and even light steel. Drawings and schematics are available on his website.

5 Responses to Build a 3 axis milling machine for under $100

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  1. Joe Zimmerman on said:

    I’m thinking a real stepper driver might be safer on your parallel port. Any more details how you plan to keep your PC isolated from damage would be nice.

  2. tigerzero on said:

    Impressive results! This kind of makes me wonder how well mine would machine PCBs/steel. Well… now I’m going to have to try it :-) Kudos to David for his economical design!

  3. on said:

    I’ve been wanting to try my hand at building a *cheap* CNC machine for quite a while. This looks perfect (apart from the lack of build explanation and/or detailed docs).

    However, I’ve looked at the parts list but I can’t figure out the supplier codes. Anyone have an idea what these refer to?


    Including the part numbers was a nice touch!

    Good job, David!

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