Hi, I have dry dessicant in the two trays of my CFS as well in spool-centre chambers (printed). The front screen shows 4% humidity. I’ve just returned from a week away and the HyperPLA reel is now super-brittle - snapping at the slightest handling (It jammed the CFS as soon as I powered the machine on). What’s going on?? - I didn’t think one could dry filament too much!
Probably only the first 10/20cm pla is brittle. Not al pla sit in the cfs. And wil attract moister like a sponge.
Yes, it did seem to be just the first foot or so (300mm) - but that length was enclosed in the PTFE tubing, so I still can’t see how it could have become so wet (and therefore brittle).
The silica desiccant will help keep the air dry in your CFS but will not dry out any filaments that are wet.
To dry out filament that is wet I would suggest putting it in a dryer for 8+ hours.
So the consensus here seems to be that the brittle first few inches of my HyperPLA is the result of it being too wet - but the reel was new with the printer, and it’s been in the CFS at 4% humidity ever since it was opened. Can that really be the case that the first few inches have got so wet from just sitting in the PTFE tubing in the CFS?
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Yes that shortish length outside of the drier can be too wet. With TPU I will snip that short length off before starting a print, but I do live in an area that is rather wet/humid.
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My office is around 40% humidity, so not terribly wet.