E3D Lite6 Thermistor Configuration w/Duet Wifi

[SnowCrash]

Hi,

I'm hoping someone could verify (or amend) my info on the relevant M305 parameters for configuring the thermistor that comes with E3D's Lite6 HotEnd.

Hotend: E3D Lite6 (listing)

Thermistor: Semitec 104GT (listing, datasheet)

Resistance at 25 Deg (C): 100K

Beta: 4267K

Hence, my M305 in config.g currently looks like this:

M305 P1 T100000 B4267 R4700

Are these parameters right? Is there something I'm missing and need to add?

Also, I'm assuming the R parameter ('series resistor value') relates to the onboard resistor on the Duet Wifi? If so, is 4K7 the correct value?

Thanks!
SnowCrash

[dc42]

That's not right. see https://e3d-online.dozuki.com/Guide/Lite6+RepRap+Firmware+Configuration/30?lang=en.

[SnowCrash]

@dc42 said in E3D Lite6 Thermistor Configuration w/Duet Wifi:

https://e3d-online.dozuki.com/Guide/Lite6+RepRap+Firmware+Configuration/30?lang=en

Thank you very much, @dc42!

Used the configurator and got this:

; Heaters
M140 H-1                                 ; Disable heated bed
M305 P1 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S240                             ; Set temperature limit for heater 1 to 240C

Makes more sense?

[dc42]

Yes. You might want to set the temperature limit a little higher to allow for overshoot when heating up.

[SnowCrash]

Thanks for the suggestion, @dc42.

I considered setting the limit higher, however the Lite6 has a PTFE tube inside and E3D warns that the HotEnd shouldn't go above 240 deg or that tube can get damaged so I kept the limit to that.