I run my printer through a Shelly. That way, I can observe prints remotely (webcam) and kill the power, should software shutdown fail. My Shelly is also set up so that the machine cannot exceed what the PSU is rated at. That would probably not be a good enough measure for a runaway (and melting) hot end once that has started a fire, but I feel pretty calm about the thing printing while I’m at work. I check the camera every half hour or so for print issues or worse.

The thing is: Should all runaway countermeasures on the software side fail, I’d have to be able to see the molten aluminium dripping onto the bed before it’s too late. I figure it’s a risk you have to take if you use a machine that will heat to up to 300° C to melt shit for hours on end.

The “Paradeiser” gave it away.