Nozzle went from .35 to 3.0

[ednisley]

let you set the nozzle size at 3 mm

Only if you use mmmm 6 mm filament: otherwise, the hot end operates in flow-through mode...

[Rara]

Any sign of the missing piece? I'm assuming it's buried in the print somewhere but I'd be tempted to melt it down to try to find it and do some nondestructive cleaning to do some RCA. I'm thinking the nozzle was drilled just a bit too deep so it was thin near where it necks down to the extrusion diameter, the very tip was fatigued after a lot of extrude-retract cycles, and the cleaning filament just did it in since it's more difficult to extrude (tried some once, it always stripped no matter the speed, temperature or tension..I'd imagine there are some increased loads with things like that!).

[Vprints]

Or.. I wonder if S3D will let you set the nozzle size at 3 mm, it would really speed things up

The thought did cross my mind very briefly.

Just out of curiosity, have you been using any metal infused filaments?

No -- I have a bronzefill sample that I've refrained from using out of fear it might damage my nozzle... Just PLA, ABS, PETg, and a little bit of cleaning filament (just a handful of times over the past month or so.)

Any sign of the missing piece? I'm assuming it's buried in the print somewhere but I'd be tempted to melt it down to try to find it and do some nondestructive cleaning to do some RCA. I'm thinking the nozzle was drilled just a bit too deep so it was thin near where it necks down to the extrusion diameter, the very tip was fatigued after a lot of extrude-retract cycles, and the cleaning filament just did it in since it's more difficult to extrude (tried some once, it always stripped no matter the speed, temperature or tension..I'd imagine there are some increased loads with things like that!).

No, I never did find it -- I'm assuming it's in the plastic scrap bucket. (I checked the initial big blob, but it wasn't in there.)

I've always taken the cleaning filament slow -- since the point is for it to grab stuff on its way anyway -- and in moderation. At any rate, I think if the cleaning filament is breaking your nozzle before the filament strips, maybe you've got your tension tweaked a tad bit high.