Oddbean new post about login | logout @20ffb98d @5756e48c Are you using the hardened steel hotend for non-abrasive filaments?
@2c1a2dac @5756e48c Yes, but that shouldn't be a problem, as long as you bump the temperature 10C. According to Qidi, their hotend is rated to 350C. I mostly did this to avoid having to switch hotends in case I wanted to print abrasives.
@20ffb98d @5756e48c Well, that does also make heat creep more likely... Your shop, your rules, but I wouldn't make the same choice. 🤷 On my other main printer, I didn't move from the Orbiter 1.5 to the Orbiter 2.0 because it dropped the release lever, but I now find I do cold pulls without releasing the lever and it back drives the stepper and works fine. I haven't done any on my Qidi yet, but... was it actually impossible to pull through the extruder, back driving the stepper?
@2c1a2dac @5756e48c Yeah, I guess that makes sense, but at the same time, this means the hardened steel nozzle is unusable: you have to bump 10 degrees anyway, and if that makes heat creep so likely, it's gonna be a problem no matter what. Consider PC-CF, for instance! Plus, several other enclosed printers run hardened nozzles by default without such issues (X1C for instance), so it's just a bad hotend design IMHO. I couldn't even manually feed filament _in_ when trying to cold pull.
@2c1a2dac @5756e48c To clarify: imagine if, instead of ABS, I wanted to run ABS-GF. I need a hardened nozzle, and to maintain the same flow, I'd need a 10C bump. Yes, if I use it _less_, heat creep is less likely, but if I mostly print ABS-GF (which Qidi seem to expect, since they sell the stuff), I'll hit heat creep issues anyway.