Everyone knows that the U1 has four tool heads, but only one tool head is working at the front.
So, can we achieve a process where, while Tool Head 1 at the front is printing, Tool Head 2 in the background performs material retraction, feeding, and flushing?
Then, after Tool Head 1 finishes printing, it returns to its position, and Tool Head 2 takes over.
In this process, the tool head changes materials without occupying any printing time.
I believe this is the direction for U1’s future updates.
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If I understand the computer translation correctly…
I do not think so as it is currently implemented. In order to unload an extruder, there is some “ramming” performed. This includes needing to perform a small extrusion before fully retracting a material. It cannot do this while the tool is sitting on the silicone plug.
It is similar to how you would push then pull a filament when manually unloading it from any extruder without motor assistance. To ensure a clean tip is pulled from the extruder and prevent a hard clog.
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Each tool head has independent power supply. I believe the extruder motor of an unloaded tool head can still function.
Regarding your point about needing to extrude a small amount of filament, that is also achievable.
The issue lies in modifying this silicone plug.
I noticed that this silicone plug is removable, so modification should not be difficult.