big problems on the nozzle temperature

paolozampini1973

@dc42
I noticed that on the forum we talk about everything but not the most important thing the temperatures are in maintaining temperature.

the system is not able to self-manage temperatures stabilizing a temperature is really very complex and as far as it takes to find the right compromise which I don't like I would like to have an algorithm without compromises it must be absolutely perfect I hope that dc42 can answer me and I would like to exchange views

Phaedrux

Have you done a PID auto tune of the heater yet?

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Heaters_tuning

paolozampini1973

@phaedrux said in big problems on the nozzle temperature:

Have you done a PID auto tune of the heater yet?

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Heaters_tuning

Yes Of course I did the temperature remains quite stable The problem is another one that takes a breath to lower the temperature what I said it is possible that there is no algorithmic auto

fcwilt

@paolozampini1973 said in big problems on the nozzle temperature:

I would like to have an algorithm without compromises it must be absolutely perfect

Why must it be absolutely perfect?

The current system meets the real world needs of FDM printers.

What are you unable to do with the current system?

Frederick

deckingman

@paolozampini1973 said in big problems on the nozzle temperature:

............. I would like to have an algorithm without compromises it must be absolutely perfect ...............

I'd say that's probably an impossible thing to achieve because the temperature of the nozzle can be affected by external factors that the algorithm has no "knowledge" of. For example, deflected part cooling air reaching the nozzle, which itself could vary depending on the size and shape of the part being printed. Or the door of an enclosure being opened.

An algorithm can only react to a change in temperature after the event So inevitably there has to be some change in temperature before the algorithm can make the necessary adjustment, which means it will not be "absolutely perfect".

The best thing you can do is protect the hot end from external influences by for example, fitting a silicone sock or arranging the part cooling fans to prevent air being deflected onto the nozzle. Or print ABS and don't use part cooling fans at all (but remember not to open the chamber doors).

paolozampini1973

@deckingman Thanks

paolozampini1973

@fcwilt said in big problems on the nozzle temperature:

@paolozampini1973 said in big problems on the nozzle temperature:

I would like to have an algorithm without compromises it must be absolutely perfect

Why must it be absolutely perfect?

The current system meets the real world needs of FDM printers.

What are you unable to do with the current system?

Frederick

Thanks