The part cooling fan, currently in mainline, blows onto the hot block of the mosquito an causes a large temperature differential in the block. A heater tune in RRF with the part cooling fan at 100% will fail as the heater cannot keep the block hot. Its also possible to get filament clogging if the part cooling fan is used at too high of a setting.
A temporary part cooling fan is currently checked into the dev branch to alleviate this issue but its part cooling performance is far from optimized.
Some problems with the design:
The selected height for the floor of the nozzle is too high
The openings in the nozzle are too tall, allowing air to flow directly into the hot block.
There is unequal air distribution between the center vent and the side vents, the center vent passes the majority of the air.
The latest nozzle design has been performing well, printing nice test parts in PETG and PLA. I also don't have any issues tuning the heater with the fan running at 100%.
The part cooling fan, currently in mainline, blows onto the hot block of the mosquito an causes a large temperature differential in the block. A heater tune in RRF with the part cooling fan at 100% will fail as the heater cannot keep the block hot. Its also possible to get filament clogging if the part cooling fan is used at too high of a setting.
A temporary part cooling fan is currently checked into the dev branch to alleviate this issue but its part cooling performance is far from optimized.
Some problems with the design: