Almost ready! Just a bit more refinement to go.
Sweet
Erm…pressure sensor…underfloor heating…or induction plate that kills burglars with pacemakers?
Heatbed @Peter_Wraxall
For a heated doormat? What are we looking at here?
Resistance heater for 3d printer bed…
Custom heated bed (_)
Yep, lol.
What sort of temperature do you need for the correct level of resistance? It’s a good design but isn’t it going to use a lot of electricity and only be cost effective if you only do very large prints or pack the bed with lots of smaller prints? I understand why a hotbed is needed but there must be another way to do this.
I think most beds aim for a resistance around 2ohms of I’m not mistaken. I’m running a 24v system. U can figure out the math from there. That’s an idea system, but i need to replace the batteries in my multimeter before i can test my setup. I’m not nit so sure that these types of beds are inefficient given sufficient insulation and maybe an enclosure. I’ll concede that this is an unusually large area to heat tho, and maybe there is a way to hear it I don’t know about @Peter_Wraxall
You need between 50 and 100 degrees centigrade. I would have thought that it could be possible to have a ceramic glass sandwich containing a heat retaining gel with the underside coated with heat conducting paint through which a current is passed. See https://www.youtube.com/watch?v=lidESFVnehA
you just described the same system, just using insane numbers for heating tho. 440v and what looks to be thousands of watts of power. i think that is way more inefficient.