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People that build or use 3D printers aren’t necessarily qualified electricians or know how to handle high voltage safely. That’s what I mean for ” Can’t let Darwin wipe them out when they happens to the target market… ”

The QD terminals are totally fine as long as you have a ratchet crimper, which I saw you said that you did.

Ah yes, the typical “Let’s leave that discussion for somewhere else” when the downsides of EVs are pointed out…

The saw cuts in both directions, one person pulls, and the other slightly lifts and the saw cuts. then the other person pulls and the opposite person slightly lifts and follows the saw. Each person has a pull stroke and a less strenuous return stroke.

And if your primary and secondary are of different wire gauges, the thinner one becomes your limiting current factor. Wired in parallel gives the same ampere-turn count, but with less resistance, possible more AMPeres, so more aoere-turns.

15A is more like 1,500 times what’s required to kill you, depending on what part of your anatomy it finds to traverse.

In my experience there are only TRIACs that are in perfect working order or TRIACs that have exploded.

As always, in terms of refinement, petrol or diesel drivers need to recalibrate their minds, not least because the near silence (bar wind noise) below 2000rpm stands in contrast to the engine noise that intrudes thereafter. At a cruise the peace is notable, while if you push on the arrival of engine noise is a momentary surprise rather than a permanent irritation. A sub-8.0sec 0-62mph time underlines that this is a reasonably pacy hatch too.

First off, I would set the system up more like a safety-critical system. I would have an independent, segregated processor running the heated bed. I would have checks in the system processor and re-checks built into an independent circuit built from discrete analog/digital circuits on the system. I would use two, independent temperature sensors on the board, plus at least one thermal fuse, as well as one overload protection mechanism (most likely a fuse).

Dude routinely welds wearing shorts and flip flops. He’s also known to weld quite a bit of galvanized steel, as he does in this video with the lifting ring. Not saying he should do any of this, but there it is.

The printer does not print onto the heater. The heater is normally under the bed which can be a variety of materials. I use polycarbonate, a lot of people use glass, I think most printers come with aluminium with Kapton tape on top. The heater for the bed is usually safely tucked away where you would need to be somewhat of a contortionist to actually touch it.

Translucent (pellicle) mirror. Undoubtedly the biggest story of the Sony SLT-series cameras is their use of a translucent mirror. Also known as pellicle mirror, this works by allowing most light to pass through to the imaging surface beneath, while a small portion is reflected for other purposes. Sony is not the first camera manufacturer to use a translucent mirror in an SLR-style camera, with the manual focus Canon Pellix film camera from 1965 taking that credit. The Pellix was followed by a handful of other pellicle mirror-based SLRs from Canon, Nikon, and Mamiya, largely designed for professional photographers, and manufactured in very limited production runs. It wasn’t until 1989′s Canon EOS RT that the first autofocus pellicle camera was released, followed by the EOS-1N RS in 1995. Fifteen years later, Sony has become the first company to resurrect the pellicle mirror for use in an interchangeable lens digital camera.