Suction Head for attaching a Zimpure Air Purifier to the SE300 hot end

thingiverse

I've noticed that some filaments, particularly PETG material, tend to irritate my eyes and sinuses during lengthy prints. My workshop lacks proper ventilation, so I had to choose between moving my printer to a garage or basement, installing ventilation through the wall of my workshop, or finding a self-contained filtration system. The Zimpure product caught my attention as a simple solution, so I decided to give it a try. However, there was no suction head available for the SE300 on my Artemis, so I had to design one myself. The photos show it mounted on an Artemis printer. It's printed in red Push Plastic PLA, and with the silicone sock on the heater block, the PLA stays cool. Without the sock, you might need to print it in ABS or PETG. The two parts are keyed for assembly and can be super-glued together. I recommend using 100% infill rectilinear, .2mm layers, and .6mm extrusion width. I had good luck printing these without support, but if you don't get good bridging on the end that goes nearest the heater block, you might use some support there. The suction head attaches using the screw that fastens the SE300 circuit board to the top of one of the layer fans. For my Artemis printer, I found the optimal length of the black silicone suction tube to be about 29 inches, shortened from the stock tubing supplied with the Zimpure. The added mass of the suction head and tubing might cause some artifacts like ringing at higher print speeds, but I don't see much of that at 40mm/s speed. I did a 30-minute test print with ABS, and the filter seemed to keep the smell to a minimum, although it didn't eliminate it completely. Stay tuned for updates. Despite the tight fit, after about 12 hours of printing, the tube popped out of the suction head. You might want to check it before long prints to make sure it's pushed all the way in. I was wondering if the suction head and tube added enough mass to increase ringing, so I printed a test cube designed to induce ringing with lots of sharp corners. The last photo shows that the additional mass of the Zimpure components only contributed very slightly to ringing artifacts. The default settings on the Artemis Duet firmware are MaxAccel = 5000 and MaxJerk = 2000. When I reduced these to 500 and 10, the ringing on the test cube was almost nonexistent, and there was no noticeable difference when the Zimpure suction head and tube were connected vs absent.