@fcwilt
Frederick,
This is the graph produced by the Z- probe thermistor and my measurements of the Z offset by G30 S-1 at specific temperatures. So 50 degrees is 1mm extra z-offset this makes the C in the G31 temperature coefficient of Z parameter in mm/°C 0.02 although it's not lineair.
I am adding in config.g:
M308 S2 P"temp2" A"Pinda" Y"thermistor" T100000 B3950 ; temperature of PINDA2
G31 P500 X0 Y-24 Z0.95 S21 H2 C0.02 ; C' (temperature coefficient of Z parameter in mm/°C, default zero
Tried this but it's not leading to higher the trigger distance when the probe is 50 degrees hotter. So this is not working. My superpinda just arrived wich seems to be temperature resistent. Let's try because this is not leading to consistent z-offset in my case.
I changed in config.g the C to T because of Firmware 3.3 in my machine and now it's working:
M308 S2 P"temp2" A"Pinda" Y"thermistor" T100000 B3950 ; temperature of PINDA2
G31 P500 X0 Y-24 Z0.95 S21 H2 T0.02 ; T' (temperature coefficient of Z parameter in mm/°C, default zero
Still going to test the superpinda, see if it works better without compensation.