Rapido UHF Hotend Thermistor value

selva_tvi

Hi all,

We are using Duet 3 Mini 5+ board.

And using Rapido UHF hotend. Their thermistor is 104NT-4-R025H42G with a heating power of 115W.

I am using a B value of 4138. And did the PID tuning. It is fine now.

Still wondering, is there another B value should I use?

Thanks

dc42

@selva_tvi said in Rapido UHF Hotend Thermistor value:

104NT-4-R025H42G

Using just a B value and no C value won't give you accurate readings at high temperatures. I suggest you take three resistance-temperature values from the table at https://static.rapidonline.com/pdf/61187_v2.pdf (e.g. 25C, 130C and 250C) and plug them into the calculator in the configuration tool, to calculate appropriate B and C values.

selva_tvi

@dc42 Thanks.

Is it this configurator?
https://configtool.reprapfirmware.org/Start

If not mistaken, where can i get the calculator?

jay_s_uk

@selva_tvi its on the heaters page. click on the B or C value and then from the drop down box select custom. you can then fill in some values

selva_tvi

@jay_s_uk Resistance Calculator.png

Hidden calculator. Thanks