Thank you for this hints - I think I will better try to cut my model out of sheet aluminium than print it in PLA :-)
Regarding flow control I thought about using a resistor to reduce the flow on the right side fans so to have nearly equal conditions on both sides (left fan flow has more way to travel :-) )
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3dcase 37
Hi,
Made myself these 2 40mm fanducts for my dualextruder (Standard Umltimaker) printed in ABS.. the PLA ones only lasted 10 seconds . Running around 30% gives enough flow. Better circulation around the print I guess,(Doing where they are made for) So 4 of your 25mm's are more than enough!... Guess you Might consider 1 on each side.
I do like the idea off that UM2 kind of Heatshield (I guess it is) under the heating blocks.
But when I'm printing dual colors it gets pretty messy sometimes :(.
Don't know what the UM2 users have experienced until now?, but I'm afraid of piles of burned Pla in between that shield.
Or it should be very easily removed....
https://www.youmagine.com/designs/40mm-fanducts-for-dual-extruder
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