What? Yeah. What? Yeah, what's up? I decoded the plans for Article 294. Oh cool, because I'm almost done with the retrofit. Well, I'm getting there. Getting this mill was total luck. I never find another deal like this. After its glance, everything on this machine seemed to be working. Fortunately, the main controller has some issues. What is happening? To reverse engineer something, you need to get into the mind of the engineer who's designing it. Having deep into someone else's project always leads to a few surprises. Why did they do this? How did they do that? What problem were they solving with this? Surprisingly, this machine is very similar to a modern CNC controller. There are three motor drivers, one for each axis, and they're each controlled by just two pins, a step pin and a direction pin. When a step pin is pulsed once, the motor will make one step. And when the direction pin goes to ground to five volts, it will determine the direction of that step. This is a very common and standard configuration. This makes it very easy to adapt to the controller. We need to map each pin to see what they do, where they go. Think of it like solving a pulse. Clip, drag, find connection, log, clip, drag, find connection, log, clip, drag, find connection, log, repeat, repeat, repeat. Welcome back to Sean's QuickHacks. Did you know you can out the video directly from the Arduino using just two resistors and two wires? Well now you do! And that's it for Sean's QuickHacks. One more connection to the pin. I know, no one did it. So normally I would design a custom circuit board to make everything neat and tidy, but there's just too much on the line right now. So I quickly laser cut a mount, shoved in a Raspberry Pi, an adorable controller, and wired it up. It should be enough to get us cutting. Particle 294 is complete. This exact usage is unknown. Wait, that's not good. Yeah, there's a hole in the wall where there used to not be a hole in our 17 minutes. What? You have 16 minutes and two more. What? What? Your time calculation seems to be pretty good. Okay, okay. Can't find it. I know! Alright, here.