Prusa mini wild temperature fluctuations  

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patrik
(@patrik)
Active Member

I've got serious problems with my new Prusa mini. The temperature is not stable now and then during prints. Sometimes it is unstable most of the times sometimes only some of the time. The temp swings is almost always +-20 degrees. I've replaced the heatbreak for the Bondtech one, so I'm thinking that I might have damaged the thermistor?

Posted : 07/05/2020 11:11 am
joan.t
(@joantabb)
Veteran Member Moderator

If it was a Mk3 I would do a PID tune, from the LCD Menu, but it looks like that is not an option on the Mini... 

Have a look on youtube, for PID tune, and try it with Prontaprint... 

here is the Prusa Knowledge base article, 
https://help.prusa3d.com/en/article/pid-tuning_2265

Good luck, 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 07/05/2020 12:34 pm
patrik
(@patrik)
Active Member

I do think it is something wrong with the thermistor, I poked the wires a bit and now the temp is spot on and has been for a couple of hours. I looked for a PID tuning option on the LCD screen but couldn't find anything. I've ordered a new thermistor, until then I'll continue to fiddle with the wires.

This post was modified 4 months ago by patrik
Posted : 07/05/2020 2:35 pm
joan.t
(@joantabb)
Veteran Member Moderator

Hi Patrik, 
If the temperatures are settled at the moment I would not mess with the wires... no point tempting fate... 🙂

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 07/05/2020 2:50 pm
hannssen
(@hannssen)
New Member

Did you follow the instructions reagarding PID-values update like said on the bondtech website?

https://support.bondtech.se/Guide/0.1+Heat-break+Upgrade+Kit/60

Posted : 13/05/2020 3:08 pm
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