Layers not bonding
Hello!
I finally have my mmu2s printing for 5 hours continuosly, but..
Once the print is completed, I find the layers bond is so week that I can peel them off with my nail.
It happens with Petg/HIPS and TPU/PVA. I also have a LACK enclosure.
The layer adhesion is good on single filament print but I have the impression that the filament change is so slow that the last layer cooldown too much and the new one cannot stick to it.
I tried to run TPU/PVA without fan at all and 205c.
I tried to run PETG/HIPS with a 50% fan and 260c.
Note: I don't see any residue of the old filament after a tool change in the color/struture of the print.
Help?
David
RE: Layers not bonding
did you increase the purge value between dissimilar filaments?
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
RE: Layers not bonding
I did not. It is currently set to the default 140. What should be a good amount? 180-220-300?
RE:
Posted by: @askme
I tried to run TPU/PVA without fan at all and 205c.
I tried to run PETG/HIPS with a 50% fan and 260c.
If you are trying to print different types of filament onto each other this is the normal behavior, it is very difficult (or impossible) to get those to stick together. The MMU is more like a MultiColorOfTheSameFilamentUnit, not a true MutiMaterialUnit.
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RE: Layers not bonding
It's not that much that I want the different material to stick to each other but the layers of the same material to stick.
RE: Layers not bonding
You need to do test prints to see if you can find a suitable value. too large a value makes the waste pile huge
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