Adjustable IR Flag for Prusa MK3S MMU2S

thingiverse

After numerous failed prints and wasted filament due to loading failures, I halted production and dug into the root causes. Besides some MMU issues, I determined that the standard IR flag is part of the problem in my specific setup. I experimented with various alternatives on Thingiverse, but none worked consistently across all conditions. Therefore, I designed an adjustable version. You will require three M1.4 x 6 screws: two for securing the flag and one for adjustments. I used the following set: https://www.amazon.com/gp/product/B07NKNCM8Q/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 As with the original design, a 3mm drill is necessary to enlarge the hole for the door pivot. Be cautious not to make it too wide. The flag piece is small and delicate, so handle it carefully when removing it from the plate. I have successfully completed several multi-color prints using this device without any issues. I have included the STEP file if you wish to modify or experiment with it.