First of all, as long as the printer is running I don't usually have any problems. But whenever the printer is idle for more than a minute after completing a print, unless I start a new print or unload the filament, the thermal creep increases just enough to pull the filament at the bevel between the PTFE -Tube and expand the titanium. Chapter. I've had this on two printers with different PLA brands and this problem keeps popping up. While it can be made to work and I'd happily leave it alone for long prints (assuming the pullback distance is short), for an additional $5 I can get a full clone of a well-designed hot end that has enough titanium to cover the Gap between the aluminum profiles, flows and cools much more reliably. I see there is now a "full metal" version of this thermal break that probably doesn't have the same problem if the junction is higher up, but I also don't want the filament to run through the long, thick part of the Titanium. . I might leave them on a backup hotend or save them for a custom build with more cooling, but for now they're just a source of regret for not getting them back in time.
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