Bose is the example I always used. They never posted response curves on their speakers and they were mostly paper cones. That bothered me. Polk Audio sounded way better.
Always…
Finally manufacturers are getting closer (if this works)- I long for the days when magazines ran six month tests and gave objective reports!
I haven’t stopped thinking about this, my CoreOne cupboard is kind of designed as a dry cabinet with a shelf to hold the drier, but I’m not going to proceed with any heater/dehumidifier until I know what Prusa is up to with the MMU4 - I suspect that I may well be better off buying the linked Eibos box (or a couple of them) and scavenging the electronics - I will eventually rebuild my existing dryer along similar lines I think.
And here we go - one year later. On the left, the container which has 200 grams of dessicant got down to 11%RH a year ago and has not been opened in the meantime. The one on the right with 1KG has had a bit of use - probably opened a dozen times, it never read below 17%, I think because of the moisture in the filament in the box - so a 5% rise in a year isn’t too bad. Compare that with the boxes I have with 120gms of filament which are all around 65%, which I’m thinking the textbooks don’t consider to be “dry”.
All this shows is that the museum standards referred to above are not just guesses - if you want to keep things dry you need a big mass of dessicant.
I have been happily printing Prusa PLA without any drying issues, but other brands do suffer and PETG really needs love. I am guessing a neat compromise between having to recharge every few months and keeping stuff dryish will be to use around 500 gms per box. Would be nice to find a tin can with a screw lid so I can just bung them in the oven without any messy business though.
Just one of the issues I’ve been toying with, is how to actually dry the desiccant. It’s messy stuff if you have to take it out of vented plastic canisters and pour it back after drying.
So I bought a stack of really cheap metal food trays which hold around 350 grams each, made some nifty snap on vents (which can be screwed if the snaps don’t hold up) and now I can just remove the lids and throw them in the oven!
Will report back next year to let you know how they work!
