Basic Information: Printer Model: Voron Trident MCU / Printerboard: BigTreeTech Describe your issue: I had 40W heater and was not happy with it so i exchanged it for 60W. After ( i think ) one month of flawless printing i started to have issues with temperature drops which range up to 20 degrees…

@Sineos statement is correct: [image] Unstable hotend temperature on Trident General Discussion Likely a hardware issue with your thermistor. Your graph clearly showing it, your hotend (solid block of metal) can’t spontaneously lose 10 or 20 degree per few seconds, it…

Problem is that if i set temperature to 295 and printer is idle temperature is pretty stable ( +/- 0.5 degrees ) , the moment printer start moving deviation starts to get higher and on certain point it fails by “extruder not heating at expected rate” Issue is also replicable by same model where it …

[image] sojka: So Your solution / advice is to just replace termistor? Yes. Quite typical that such problems appear when moving or hot.

Any recommendation? If I am upgrading some part i would like to take best part possible

I started that cursed print again. This is how my graph looks currently [image]

What hotend and thermistor do you use for those quite high temps?

I have 3DV6 hotend 60W heater Regarding termistor… Not 100% sure. I am more of design guy then printer guy ( i know i should be ashamed ) I am attaching my current configuration though. printer (4).cfg (19.3 KB)

It should be the Semitec 104NT thermistor. I don’t really know whether it is better to use the sensor type ATC Semitec 104NT-4-R025H42G or the Generic 3950 to have more accurate readings especially at your higher temps. However you might be at the upper limit of the V6 hotend where increased wear…

I will try to print on 260 and see what will happen.

[image] LifeOfBrian: Semitec 104NT These thermistors have a Temp_max of 300°C You are running the thermistor hard on the edge. It is to be expected they will have flaws with the readings. https://www.mouser.de/datasheet/2/362/P18_NT_Thermistor-1535133.pdf

Unstable hotend temperature on Trident

General Discussion

Sineos March 11, 2024, 8:17am 2

Likely a hardware issue with your thermistor.

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Unstable hotend temperature on Trident

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