[MINI] Nozzle leaking  

Active Member

I’m running the first layer calibration and am noticing something very frustrating.

When the hotend is being heated (using PLA, 215°C), the filament tends to leak from the nozzle and clings onto it. I have to constantly remove it with pliers. I’ve run many purges and it still continues.

What is causing this? 

Posted : 05/06/2020 7:26 am
Active Member

Image of leakage 

Posted : 05/06/2020 7:32 am
Active Member

Attempted to print despite this leakage and ended up with a blob 🙁

Posted : 05/06/2020 7:49 am
John Doe
Trusted Member

On my non prusa printer it does too. I usually have to heat the noozle and take it away via some wooksticks. But I recently changed in Cura to clean it over the bed before going to printing (add gcode before the printing). Basically it makes a 2cm line outside the first layer before going to the first layer area..

Posted : 05/06/2020 12:18 pm
Prominent Member

It's caused by melted filament and gravity, I'd say? 

Not sure what slicer you are using, but for MINI profile, Prusa Slicer puts starter G-code that heats the nozzle to 170 degrees and then does probing. After probing, it heats to desired temperature. This prevents leaving mess allover bed when preparing to print. Priming line outside print area is part of starter G-code too. If you use Prusa Slicer and don't have this, you may want to add a profile for your printer. If you use other slicer, you may want to make your own starter G-code with similar settings.

This post was modified 8 months ago by Crawlerin
Posted : 06/06/2020 2:22 am
New Member


Have you solved this problem or figured out why this happens? I have this problem too and not sure what to do with it.


Posted : 13/11/2020 2:46 pm

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