Hey all, I'm testing out duet2 wifi and must say I'm impressed (except the whole ending up with a v2 config out of the configurator, fixing it bit by bit and then realising that I should have just asked for a v3...)
Anyhow, this printer that was on ramps (very modified anet a8) is all running nicely except the bed temp is WAY off (I have a non-contact thermometer and it's off by about 20 degrees.) I seem to be one of the "lucky" folks who ended up with something that kinda fell within the vishay (marlin no 8 ) thermistor. At least, Marlin/RAMPS was working close enough with that, unless the firmware on disk doesn't match what I had but I think it did.
https://github.com/MarlinFirmware/Marlin/blob/2.0.x/Marlin/src/module/thermistor/thermistor_8.h is the table from marlin but I don't quite know how to convert that to Beta with a C value, or at least if I use the comment in that file (beta25 = 3950 K) with a C of 7.060000e-8 or no C or C0, it doesn't match nicely at all.
I also don't seem to find a nice walkthrough for using a thermometer and getting the resistance values. Is there a G-code for getting the raw thermistor value I can plug into the calculator then?