Print problems and fixes

Phaedrux

@chriskimbr M501 should go at the end.

https://duet3d.dozuki.com/Wiki/Gcode#Section_M500_Store_parameters

dc42

@chriskimbr said in Print problems and fixes:

@dc42 Sorry forum won't let me uncomment this line says its spam.

Ive been using this line ...
M305 P1 T100000 B4388 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1

Do i need the C7.060000e-8 value?
I got this from someone elses config and am not sure if i need it or what to set mine at.

Those settings look to me like settings intended for the 104GT2 thermistor used in E3D hot ends, but they are not correct even for that one.

chriskimbr

@dc42 so what should i do?

Phaedrux

Given the low cost of a new thermistor with known values, I would probably just go that way and get a genuine Semitek from E3D.

chriskimbr

@phaedrux I installed a
Genuine E3D V6 All-Metal HotEnd 1.75mm Universal w/Bowden Full Kit - 24V (V6-175-B-24V)
https://www.amazon.com/dp/B07FJW9343/ref=cm_sw_em_r_mt_dp_U_2-YHCb7H4J2RD

$74 instead of $11 for the clone. Ouch!

However, the duet is still reporting 20degress more than actual temperature.
I checked it with Multimeter temp thermistor.

What do I need to change in the m305 line above?
Anything else?

Phaedrux

https://wiki.e3d-online.com/E3D-v6_Assembly#RepRapFirmware

Edit the M305 P1 command in file sys/config.g on the SD card (you can do this in the web interface).
For firmware versions 1.17 and later, set the B parameter to 4725 and the C parameter to 7.06e-8.

chriskimbr

@phaedrux said in Print problems and fixes:

7.06e-8

Thanks for the info and link.

So i have this now. what is the Rvalue? is it correct?
M305 P1 T100000 B4725 C7.06e-8 R4700 S"Hot End Heater" ; Set thermistor + ADC parameters for heater 1

Phaedrux

That should be correct.

The R value for the Duet Wifi is 4700.

https://duet3d.dozuki.com/Wiki/Connecting_thermistors_or_PT1000_temperature_sensors

chriskimbr

@phaedrux yay! I brought it to 220C and duetwifi reads 220 and my multimeter therm reads 220.
Thanks!!!

dc42

The R value in the M305 command can be omitted, except by some users of legacy Duets (0.6 and 0.85)