And the group lets out a collective ‘Bout Freekin’ Time.’
Hey that’s Great, Umm what are they?
Force Sensitive Resistor, the currently hot way to auto level the bed…and after listening to me go on (and on) about calibration, should be the thing to get me to shut up.
http://www.phidgets.com/products.php?category=33&product_id=3104_0
Maximum temperature is 70 degrees, so it needs to be isolated somehow, but an interesting approach!
We found they work best with a nylon disk on the centre of the pad between the FSR and the bed anyway, that might do you for your thermal isolation.
I was just looking at these on DigiKey last night. Cool little buggers!
I’m running an unheated bed, currently, so temp shouldn’t be a problem
I can’t wait until you hooked them up and share the pros and cons. Will you?
‘bout freakin’ time!
Yuk @ RepRap wiki using them like buttons is horrid. Wire them in parallel to the 2nd extruder thermistor pins.
Man I sure do like living way out here on the ‘edge’ of technology. 
Anything’s better than my current calibration method.
I wonder if you could put a thin sheet of metal on the build platform and have the hotend itself complete the circuit. Or put contacts around the platform wired in series whose height relative to the build surface is known.
Oh it stayed relatively well calibrated, about the fourth iteration around…
So, for the folks that have done this, I also picked up the voltage divider (it was cheap), but reading some of these pages, it doesn’t look like that’s necessary…so is it?