Anycubic MEGA S Fan Duct Remix

Last crawled date: 4 years, 2 months ago

I made another fan duct. It's a remix of Mileshkins and z073 fan ducts. This one works really well. Dial your fan speeds back. If your nozzle temp starts dropping, dial the fan back. The vents are really low close to the build plate. On large flat prints you will get nozzle cooling if the fan speed is too high.
I included a pic of the benchy I printed using this duct. I've been struggling with the bow overhang area. I finally got it to print well. The vents are front and back. I rotated the benchy to face the vents. Slowed my wall speed way down to 10mm/s and print the inner wall before the outer wall. The infill was at 35% for this one. Fan speeds are as in the pic, 35% 25% and 35%.
I got my settings from Tomb of 3D Printed Horrors and they work awesome. Look him up on Youtube. I adjusted his settings for general part making at .25mm layer height.
I had a request for raising the bottom of the fan duct in the model so it clears the bed clamps. I think I can do this and I will repost a variant hopefully soon. I moved the bed clamp near "Home" at X0Y0 back an inch or so to clear the duct in the "Home" position. I've had such problems with cooling that I designed this to be as low as possible to keep air from blowing directly on the nozzle. I don't know about anyone else, I want the part to be cooled not the nozzle. I run my hot end at 187C. Sometimes it drops to 185C and comes right back up. If your hot end drops below 180C dial your fan speed back. Everyones printer is a little different so make adjustments accordingly.