Hello everyone, I have a question on my mind. I’m curious about your thoughts. As you know, the H2D comes with two extruders, which means incredible time and material savings for multi-color printing. However, from my initial observations, when one extruder is working, the other does not switch to the next filament in advance; it waits until its turn to change (even in a 2 AMS setup). Can this be improved with a future update, or is there a reason for this limitation that I might not be seeing?
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I was thinking about this myself and only good reason for not loading second filament until it’s needed or just before is that the not used filament is going to have a lot of flexing in the ptfe tube before any extrusion and that might cause it to break.
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Based on reviews, I think the 2nd filament sits in the ptfe tube anyway. Someone said it breaks in the tube after a while of not switching. I imagine bambu will have an update to fix it. Maybe always pull it back when its not being used for a certain number of layers.
The reason it doesnt completely prepare the next color, is because it cant purge while printing.
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I was thinking the same thing. It definitely wouldn’t be able to purge, but if it paused briefly to cut before switching nozzles it seems like it could then roll the filament back and get the next one ready to purge.
Example: Left head on AMS with two colors, right fed externally
Printer finishes color 1 on the left head, and cuts the filement before switching to the right nozzle. Then while the right nozzle is printing, it rolls color 1 back into the ams and rolls color 2 out. Then when it’s finished printing the right nozzle, it just has to swap to left then purge and prime.
Yep see my thread too. I am running an idex for years with filament in the second head. Only super brittle filaments broke like a few times