Possible mix up of nozzle cleaning and bed probing sequences.
I suspect that the nozzle cleaning and bed probing cycles may be mixed up in the core one firmware.
What I've noticed is that during bed probing the nozzle pushes out a tiny bit of filament (leaving marks on the bed). Whilst when nozzle cleaning it doesn't try to do this. I'd expect it to be the other way round for best results.
This post shows a photo of the probing marks...
Wet filament. Dry it.
Cheerio,
RE: Possible mix up of nozzle cleaning and bed probing sequences.
To add to this, as an experiment, I took 2 rolls of Prusament PETG, one that had just come out of the drier and one that had been sitting out open in open 6 months and did only a bed probe. The exposed filament left dots at the probe points. The dry filament left none.
RE: Possible mix up of nozzle cleaning and bed probing sequences.
Why would new Prusament filament be supplied vacuum bagged in a wet state?
Why would the filament be dry whilst nozzle cleaning (not leaving dots), then be wet whilst bed probing (leaving dots).
Why is nozzle cleaning generally not very succesful? It just seems to repeatedly tap the nozzle with no extrusion (grinding any excess further into the nozzle).
Then for the next print (without any drying) the filament would again be dry whilst nozzle cleaning but wet for probing?
No, it doesn't make sense that this is just wet filament. The issue is with the actuation of the extruder during these procedures.
Perhaps you sell filament dryers?!
RE:
Why would new Prusament filament be supplied vacuum bagged in a wet state?
Why would the filament be dry whilst nozzle cleaning (not leaving dots), then be wet whilst bed probing (leaving dots).
Why is nozzle cleaning generally not very succesful? It just seems to repeatedly tap the nozzle with no extrusion (grinding any excess further into the nozzle).
Then for the next print (without any drying) the filament would again be dry whilst nozzle cleaning but wet for probing?
No, it doesn't make sense that this is just wet filament. The issue is with the actuation of the extruder during these procedures.
Perhaps you sell filament dryers?!
A common mistake is assuming because the filament came straight from the vacuum bag, that it was dry when it was placed in the bag at the factory. I had filament (Overture) come from a sealed vacuum bag that sizzled and popped when it ran through the extruder. I always throw it in the drier after removing it from the bag. Not saying this is your case. It could be something else. But it would hurt to dry it first and see?
And yes, you caught me. I do work for a secret cabal of filament dryer manufactures. Our motto: "A dryer in every home"
Filament is packed dry when manufactured. Dessicant is included because moisture slowly penetrates the package - if you get a recent batch it probably does arrive dry enough to print straight away BUT — You usually have no way of knowing how long it sat in a warehouse or how it was treated in transit.
Cleaning and probing motions are in different planes.
Cheerio,