Anti warping airflow optimization for Anycubic i3 Mega S

thingiverse

I tried printing with my Anycubic ABS and had big problems with warping. Blue tape, hairspray, putting the printer in a closet to avoid drafts - nothing helped. Then I had the question - if drafts are so bad for ABS - why does the right fan in the print head blow on the cooling fins and the air flows freely down onto the component...? Then when I found a Youtube video (link below) describing this issue, I designed these parts here. Thanks to NAUS for the idea!!! It consists of 2 parts. A plate that closes the printhead housing at the bottom, and an air outlet for the front. The plate is only an exact fit if the original fan has already been replaced with a 5015. For the air outlet, the original housing must be sawed and the resulting tab is bent forward. So that the air outlet does not rattle when printing I have fixed it with a screw. Since the plate does not close the bottom of the housing 100%, I have chosen the air outlet so large that the air flow from the fan can escape unhindered and almost no air escapes through the cracks down. This way I successfully reduced the warping of ABS to a minimum. In addition, I use sugar water to improve the print bed adhesion. It works great, is super cheap and is easy to apply without affecting other parts of the printer, like hairspray for example. I know - this conversion requires some craftsmanship - and the parts I made only fit if you use the 5015 fan in conjunction with the original case, but maybe it's a suggestion for others to avoid the airflow downwards. The parts should not be printed with PLA because they are exposed to the heat of the print bed and the print nozzle! The first thing to do is to mount the outlet and screw the housing back together. Then you can insert the plate from below (from the right) - between the first and second cooling fins. Youtube video where i got the idea from: https://www.youtube.com/watch?v=wjSpVN19x7A