u/Oceandog65

Posting this to show my results FYI and to invite comments on these results. I'm printing a 2 color 3.5 hour print, both filaments are ASA, on my P2S. Black ASA is Polymaker, orange is Tinmorry, both dried for 12 hours in my AMS HT. I'm using the Bambu P2S's generic ASA filament print profile for both with some tweaks, I boosted the nozzle temp and bed temp to 260 and 102 degrees C respectively. I preheated beforehand for 25 minutes to get the P2S chamber to 51 degrees.

I've got a Voxel Bentobox installed in my P2S running in recirculate mode and a Voxel aftermarket carbon and HEPA filter replacing the Bambu stock carbon filter. I installed the Bambu exhaust fan with the replacement back panel and am running it at 30% and venting it to the outdoors to maintain negative pressure during the print. The internal temperature has stayed at 51 degrees during the print with the 30% fan speed. My cheap indoor air quality monitor for the first 2.5 hours of the print has shown normal levels for all 3 PM levels (1, 2.5, and 10) and TVOC level.

Overall air quality is fine and my Winix room air filter has stayed at normal speed, its built in monitor apparently has not detected higher levels of any substances it needs to ramp up for. I'm thinking that this means I'm fairly safe. Thoughts?

It's only coincidental that my issue should arise at the same time as the whole controversy regarding Bambu and the open source code. I am a semi-retired patent/intellectual property attorney that has been 3D printing and learning design for over 2 years. Recently I agreed to do a patent application for a friend, more as a favor than anything else. But even at a reduced fee, my ethical and legal obligations don't diminish.

Everything I've printed up until now I didn't care if my files had to go through Bambu's servers. But I agreed to prototype my friend's invention on my 3D printer and because of the legal requirement the US Patent and Trademark Office places upon me to keep his model a secret, I have to print directly to the printer (P2S) with no possibility of it being seen by anyone else. I just need to do this for this one item. I'm aware I can print from an SD card but I'm not sure that's completely private. Can y'all suggest to me how I can do this in the absolute most secure way possible? I only have to do it when I'm working on his file. Thanks.

I've got my P2S set up near a window. I got the Bambu Labs exhaust kit with the upgraded back panel installed. Printed out the fan enclosure and installed it. So now I can vent to the outdoors when I print ASA or ABS. I also have the Voxel Ventobox with charcoal/HEPA on the left side and a Voxel Bambu replacement charcoal/HEPA filter where the stock filter goes on the right. I also have a Winix room charcoal/HEPA filter. This seems like plenty of filtration to me, probably to the point of overkill. Curious as to what others think. The one thing I'm wondering is if I'm only going to vent outside for ABS and ASA, maybe I should put an additional filter on the rear exhaust fan for when I'm doing PLA and other less harmful filaments since the air from the fan is going directly into the room? Or is that also overkill? Thanks