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SoliForum - 3D Printing Community → Solidoodle Discussion → Little smoke?
Hi.
So my nozzle got clogged. I have a new one that I installed. I believe I put it back together exactly as it was before. I turned on the printer and started to heat it up. At around 140C, slight smoke begins to come away from the hot end. Is this normal? I am not sure what's smoking... maybe the black cover? Do I need to make sure that the kapton tape wraps every part of the nozzle, and the black cover doesn't touch the metal at all?
thank you
dan
Ok.. tried again. Smoke stopped. Smells a bit like water evaporating... 
It is likely that the ceramic heater core was boiling away a little remaining moisture... That happens most times it gets heated up for the first time. If you didn't have to put on a new heater core, make sure that your heater core is all the way down to the nozzle. A gap can lead to a hotter heater barrel than nozzle which could create a problem with the barrel melting out of the PEEK insulating barrel. Also make sure if kapton tape is all the way around so that the thermistor definitely will not come loose. That would lead to the same issue.
Also make sure that the thermistor is completely covered with kapton, that there is no gap between the bottom of the tape and the nozzle. You don't want any cool air to come into contact with the thermistor and make it think the nozzle isn't as hot as it really is.
With things like this, the natural oils from your fingers will burn off on first heat cycle. Same thing happens with car exhausts.
SoliForum - 3D Printing Community → Solidoodle Discussion → Little smoke?
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