MMU2S and filament diameter tolerances
Even before I had a MMU2 installed I found not all filaments were created equal. I had unloading problems with one spool and decided to measure the tolerances of the diameter*. The measurements of most spools were quite accurate up to 1%, but the troublesome spool was in the range of up to 5%, usually thinner. One other was up to 3% thinner. And sure this other spool is already troublesome for usage with the MMU2.
So the Prusament accuracy isn't overengineering, it makes the MMU2 more reliable!
*) there were ten measurements on five locations each a meter apart. Two perpendicular measurements were taken for each location on six spools.
RE: MMU2S and filament diameter tolerances
Agreed! I had the same issues and now I use prusament.
RE: MMU2S and filament diameter tolerances
I had similar experiences. Not necessarily prusament, but I had a bunch of AmazonBasics filament which has a rough surface texture. It had insane amounts of resistance in the buffer system and stock PTFE tubes. I ended up replacing the stock PTFE with 3mm id tubing, and ditched the buffer to solve that issue. I've since stocked up on/started using tighter tolerance filament to good success.