The lack of inter-layer fusion may be due to the fact that the ambient air is too cold compared to the melting temperature of your yarn. The "skin" of the deposited bead solidifies too quickly / no longer wants to merge with the next layer. You could perhaps "blow" a little hot air (temperature?) In the drop zone permanently. Finally, I say that in order to simplify the configuration / debugging of your machine
http://www.editions-harmattan.fr/index. ... te&no=4132
On my printer I can adjust the% of material from 0 to 200% in real time ... and I often increase to 150 or 200% for the first layers of adhesion, just to have a beautiful " bed "for the room without openwork ...
Some parts I printed them in 125-150% ... beyond that it can cause blisters ... Obviously it depends on the part, the plastic ... and other settings!
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