The LinuxCNC "Rigid Router" an open-source dual z-axis gantry machine

Hi all, I recently designed an open-source CNC router. My goal was to make a rigid, medium-format CNC router that can self-manufacture new machines and not require any specialized equipment for squaring the build.

All the design files, LinuxCNC configuration files, and build info are on my blog:  blog.nathantsoi.com/article/rigid-router-cnc


 

The design is based on 4590 aluminum extrusion and CNC machined parts that self-index on the frame, so no extra alignment tools are necessary:

 

I used closed-loop servo motors, but steppers should also work fine.

 

Here is the back of the X-Axis:

 

I also decided to use an old computer with an onboard parallel port, to save on cost. I built all the electronics into an old mac pro case, which looks pretty rad.

 

I also added a cheap PCIe parallel port and used it as an input-mode device for an MPG jog pendant that I also designed:

 

Finally, I added a button panel with physical buttons matching the GMocappy soft buttons and some potentiometers to control feed rates, which is really handy when I need to quickly change the feed rate or stop the running program.

 

I hope this is useful for folks who are interested in building their own machine from scratch.

Thank you! Yep, they're 4590 extrusions, but I'm not sure who makes them. They can be ordered cut to length from 8020.net/45-4590.html though, which is super convenient. And yes, I agree, the flexibility of being able to loosen and move then re-tighten the bolts/t-nuts around is great!