In case anyone is interested. I took the temp vs. resistance values Alirubber gave me for the Herculien heated bed (100k thermistor, 3950 beta value) and fit it to the Steinhart-Hart Equation. The values for the A, B, and C coefficients come out to ~ 0.0006454337947, 0.0002239473005, and 0.000000087, respectively.
This is implemented in the smoothie config file by commenting out the line for beta value (if that’s what you were previously using) to look as such:
@Jeff_DeMaagd Yeah I’m not confident in the temp readings I was getting using the beta value. I wasn’t too concerned as it was for the bed, but I wasn’t satisfied in the end. This fits the data they supplied with an RSS of ~3.4 over the 17-125 C range, so it’s definitely a much better approach (especially for ABS bed temps)