This is an Inexpensive CNC Platform
The Mostly Printed CNC is a platform to precisely control motion. This can easily be a 3D Printer, Milling machine, Laser Cutter, you name it. Maybe even make some coffee with Apach…(not me but I think he is my new hero).
Not easy to make a specs page when it can have most any specs you want.
The idea behind this is to be extremely adaptable and inexpensive. Why buy a single use machine when you can have one that does it all, for less than the cost of any single machine. No proprietary hardware or software, build it any size and shape you want (more on this later), buy it from this site or source it all yourself, helpful forums, low cost, and capable. What more could you ask for?
– All axis can be any length you prefer, anything over 3 1/2′ (1M) would require small mid-span supports to increase rigidity. The kit comes with parts for up to 48″ of X and Y axis (eg 24″x24″, 36″x12″ or any other combination). Although the smaller you make this the faster you can move it and more rigid/accurate it will be. The linear motion is ball bearings on electrical conduit, seriously, easy to use and source. More information on this here.
– X and Y axis are power by 2 stepper motors each, and a single stepper for the Z axis. The standard would be NEMA 17 in any torque 42 OZ/in and above (the kit come with 76OZ/in). No need for NEMA 23’s or their required larger drivers, power is not one of this machines issues.
– This is all controlled by any control board you like. Most people use a ramps 1.4 board for it ease of programming or the Mini-Rambo for it improved design and robust safety features. There are other Marlin based boards, GRBL, and regular CNC boards as well.
– Besides using either common imperial or metric hardware, the rest of the machine is easily 3D printable, RepRap style! Full list of hardware here, and the files for the printed parts can be had here.
– All of these things can be easily assembled with basic hand tools, no specialty/power tools or precision cuts required (it can be nice to cut the rails with a power saw but a hacksaw works fine).
All components are easily sourced or you can buy the parts from this site. Here is a ballpark breakdown.
The Bundle has all the hardware and electronics except the conduit/rails which are cheaper to source locally than ship – $253+shipping
20′ of Conduit (or stainless steel tubing for a little more money) $8ish.
Total well, let’s just say easily Under $400 if you have a 3D printer, $500ish if not.