Suggestion: Advanced Filtration Bypass?
Since I installed the Advanced Filtration Unit on the C1+, for PLA/PETG the chamber temp tends to run 3-5C hotter than the configured temp for the print. The fan in the unit just cannot move as much air as the unrestricted chamber fans were able to. I did set the max fan speed for the unit to 100%, which helped.
I think it would be interesting to have a controlled shutter to bypass the filtration, similar to the shutter on top of the printer. This would allow the chamber fans to resume normal duty if the filtration isn't needed. Just an idea for intrepid inventors or for the next generation of printers.
RE: Suggestion: Advanced Filtration Bypass?
There are printed solutions that move the filtration assembly, but a shutter seems like an incredibly simple solution. Or even a door that gets opened and closed.
RE: Suggestion: Advanced Filtration Bypass?
I was thinking about the idea a bit more. If there was an extension at the base of the filter with a flap/door on the top, if the Filtration fan was running (on the other side of the filter) the flap would stay closed as the chamber side of the filter would not be under pressure. But if the chamber fans were running, the pressure built up against the filter face would cause the flap to open. A possible downside--my understanding is that if the temp gets very high, the chamber fans will run in tandem with the filtration fan--in that scenario, the flap might open when unwanted.
Other than that, is there a G-code to switch the Advanced Filtration on/off? That would allow choosing which fans to run based on the filament type.
RE: Suggestion: Advanced Filtration Bypass?
There's gcode M147 to enable chamber filtration and M148 to disable chamber filtration. Thanks to @hyiger for his excellent list of undocumented G/M codes...