@Mike_Kelly_Mike_Make Yeah, it will be better.
Okay, I got the point of using stainless steel in heat break. But still, in my mind I imagine that using more thermally conductive material in heat break would give sharper transition. Since stainless don’t give so much heat even to heatsink! And maybe it’s just meaningless amount of energy what gets wasted?
Okay, that’s true also. But how long that tube should reach? To the nozzle or maybe 5mm of it? I planned to make heat break start almost from pinch wheels, so there is very little amount of aluminum scratching plastic. I will try first without PTFE tube. If there appears to be jammigs or else problems, I could just make new heat break with spacing for tube. And when there is that tube inside of heatsink, there is now third material between filament and water. But that is only if heat break goes to pinch wheels.
To the difficulty of integrating double pinch wheel. It doesn’t matter much since I’m doing only one extruder for myself. I can spent much time making it work! But if it would be going to mass production, there would be problems for sure. I’m not sure if you meant that, but correct me if you didn’t!
@paul_wallich Yes, that is what I’m trying to design! But since whole thing is rather small, restrictive thing is manufacturing it. So there isn’t so much opinions to do those compartment. Smallest endmill which I can use for it have diameter of 3mm.