frntz
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Posts posted by frntz
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Hello everyone,
I notice that I cannot print on my Ultimaker 2+ two times in row, it will always failed the second print by either printing the first layer then failed or cannot ... each time I have to remove the filament which is always stuck between bowden tube and the isolator and wait 1 hour or so for the printer to cool down. Gr5 Moderator mentioned an underextrusion issue which falls in my case I guess:
Quote18) third fan broken. This tends to cause complete non-extrusion part way through a print. In the rear of the head for UM2 and the front of the head for UM3. Without this fan several things can go wrong. It can take a while as usually you also need several retractions to carry the heat upwards. There are a few failure mechanisms and I don't understand them all. One of them is probably that the molten PLA spreads out above the teflon and sticks to the metal in a core or fills the gap at the base of the bowden in UM2. Later it cools enough to keep the filament from moving up or down.
I notice that sometimes the rear fan is not working at the beginning of the first print and then is always one, is it the normal behaviour ? Should I buy a new fan ?
Is someone has the same issue has myself and what can I do to fix this ?
My Printer : UM2+
My Firmware : _3.3.3
Cannot print two times in a row
in Improve your 3D prints
Posted
Thank you so much for your reply I've changed the rear fan which now is on when the nozzle is above 40°C !