RRF3 PID TUNING HOTEND ¨warning as result¨

ezemaff

Today i try to print cube from https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40#s179

and i get this error message

really need help

Phaedrux

Can you post a photo of your hotend? It sounds like something isn't quite right with the hotend.

What did the heater graph look like on that print?

ezemaff

Could be possible about power supply not working well ?

Phaedrux

That graph looks more like interference on the thermistor wires or a bad connection. It wasn't apparent in the previous graph from the tuning operation, but it's definitely apparent there.

ezemaff

bad crimp ? bad cable ?

im using cat5e and terminals crimped
i will upload photos

ezemaff

Phaedrux

Are the thermistor wires running through the same cat5 cable as a stepper or heater? That could be causing some interference. I would try running some external test wires for the thermistor and see if it's better.

ezemaff

I did it.. and i get same result.

deckingman

@ezemaff You have a noisy thermistor signal. It's either the wiring, the connectors, or the thermistor itself. If you are absolutely sure there is nothing wrong with the wiring, then change the thermistor.

ezemaff

@deckingman Could any other wire be making noise? because the thermistor is new, and the wiring its from stock on this moment.

deckingman

@ezemaff said in RRF3 PID TUNING HOTEND ¨warning as result¨:

@deckingman Could any other wire be making noise? because the thermistor is new, and the wiring its from stock on this moment.

In general, 100k thermistors are less sensitive to external noise than say pt100s but it's not impossible that another cable run parallel to the thermistor might be causing the noise. It's also not impossible for new thermistor cartridges to be faulty.

It's also quite possible that E3D's awful method of clamping the thermistor cartridge with a grub screw, has meant that you've inadvertently crushed the cartridge and/or cracked the ceramic potting compound which is causing an intermittent short circuit.

Edit. What are those wago style connectors shown above. Are they being used in the thermistor wiring? If so, ditch them.

ezemaff

@deckingman

I will try changing the thermistor for a new one ! Thanks for the help and your time !! I keep you updated

Phaedrux

@ezemaff said in RRF3 PID TUNING HOTEND ¨warning as result¨:

I did it.. and i get same result.

What exactly did you do?

ezemaff

@Phaedrux

Changed crimp, terminals, wiring with the same thermistator..

Now, i changed thermistor with the same wiring/terminals and works fine.. So it was the thermistor.

The thermistor its new.. i open the box three days ago.. Very weird..

@Phaedrux Thanks for the help.