There are not many things I find simultaneously terrifying and hilarious. Apparently one of them is the casual destruction of my project by a deadly machine with no situational awareness.

During a recent test of my new X-Carve, something unexpected happened. After beautifully carving my test piece, the machine failed to retract the powerful cutter, still spinning at 20,000rpm. Job complete, the cutter proudly returned to the default starting position using the fastest route – straight through the project. It had no idea it was slicing through wood on the way home.

After reflecting on the power of automation, I stumbled upon some obvious but noteworthy advantages to building your own equipment.

Identifying Problems

When the cutter failed to retract, I could tell from the sound it was making that the Z axis motor was not getting enough current from the controller circuit. Without the experience of building the machine, I might have assumed it to be a mechanical or signal issue. I was able to accurately identify the problem and carry out the fix in a matter of seconds – a slight clockwise turn of the Z potentiometer. Had I not learned about all this stuff over the course of building it, I would have no option to conclude I had a broken machine.

Modification and Upgrades

Since I put it together from a pile of parts, I know the machine inside out. Every little bolt, grub screw and nylock nut has a place, and I know where to find it and how to get at it. This enables me to make changes to the machine without fear of damaging anything or affecting performance.

This must be what it’s like to know how to fix cars. I suspect I’ll be building my own tools more often.