Hello Hank!
I was reading a bit about drying yesterday. Bambulab once said 55°C for PLA? Prusa writes 45°C for PLA at 5 to 6 hours? Other manufacturers may specify different temperatures. Of course, this is not good for a dryer with 4 spools if there are filaments from different manufacturers inside. But anyway, I don’t think it’s that important. However, Prusa writes that you should use a device that maintains the temperature. An oven (cooker) that is temporarily 10°C above the temperature should not be good because the filament would damaged.
Hmmm … the S4 probably maintains the temperature halfway, I haven’t measured it yet, the time can be set up to 99 hours. After the drying phase, you can send the dryer to maintenance drying (at least it keeps a certain humidity there, which I have set to below 30%. Max = 30% and it then works until it reaches 20%).
The AMS holds 4 bobbins for printing, 4 bobbins in standby in the dryer (or occasionally bobbins for post-drying if they are not used for a long time).
All spools in the dryer can only be dried at one temperature because there is only one common chamber. No matter if PLA, PETG, PAHT-CF and wood PLA are in there.
I will find my habit with it. If I want to print something, I can at least keep dry filaments on hand.
Best regards!