SUNLU Official Filament Dryer S1 Plus, Built-in Circulation Fan, Filament Dryer Box Storage Box for 3D Printer Filament 1.75 2.85 3.00, S1 Plus White

Worked great on drying filament. I’m new to 3D printing. Having problems with feeding through extruder and nozzle. Turned out, moisture was the issue. Printer is working great now. Recommend this product.

I bought this because my filament was getting humid and stringing up horribly. This fixed it, and my prints are looking much better in detail. Extremely easy to use, plug it in, turn it on, set a timer and that's about it!

This filament dryer has been a solid addition to my 3D printing setup. I was having issues with moisture in my filament, which was causing prints to fail or come out with poor quality. This dryer has pretty much eliminated those issues. The design is compact and easy to use - just load up your filament and set the temperature. The unit heats up quickly and maintains a consistent temperature, which is great for drying out sensitive materials like PLA or PETG. One thing that keeps me from giving it 5 stars is that the controls can be tough to figure out at first. Overall, I'm happy with the performance and it's saved me from a bunch of print failures. If you're struggling with moisture issues and want a simple solution, this dryer is worth checking out.

So this is a review for the SUNLU Filament Storage Box. So this box contains a heater that can be set from 35C - 55C. It has a sensor so it can display the actual temperature. So there are many things I like, and a few I don't. On the positive, this is a great box that works well. Its not much larger than the spool of filament. It can draw up to about 48 watts, which is great for a box this size. And the heater can be on when you are dispensing filament. Now what I don't like. There is no OFF switch, you just reduce the timer to zero and it shuts off. It works but I think it could be better. Also there is only two buttons, which means one of the buttons has to control what you are setting and also up/down. This is a bit confusing in day-to-day use and the buttons aren't labeled well. Second, the filament rests on two rollers, but it still takes a bit of force to pull the filament. So maybe better bearings. Third, for very sensitive filament, it would be nice is it had a j-Head connector so PTFE tube could be connected. These are all things that are easily fixed, so hopefully they will be. Still, this is a very useful product and it does a good job.

A great filament dryer!

I really shouldve bought this sunlu s1 filament dryer sooner. I've been using it for some ninjatek TPU that has been left out for about a year. It has almost completely eliminated my clogging issues. I feel like I will save alot of money over time with this unit as I always threw away filament that was clogging rather than dry it in my kitchen oven. It also nice that you can print straight from the dryer. The reviews that say it doesn't have a fan or get hot enough worried me but I found they weren't accurate to what I received.

I originally bought this to try and help salvage some old proto-pasta coils I had that had gotten brittle and hard to print with. For some of the standard PLA filaments it helped quite a bit, for the HTPLA filaments, however, this did nothing. I also had some older spools of Hatchbox filament that I hadn’t used in a couple of years. I had some prototyping prints I wanted to run through but didn’t want to crack open a new roll of filament so I stuck one inside here with some dessicant packs stuffed in the middle of the spool and left it running for a few hours and then while I printed with it and, to my surprise, the filament was much softer and pliable and printed as well as I expected fresh PLA to print. The primary reason for the 3 stars is that the unit will not stay on more than a few hours regardless of how many hours you set it to run. I turn it on in the morning, set it to stay on for 10 hours, start a 4 hour print… come back in 2-3 hours and the unit has turned off. I don’t know exactly how long it actually runs, but 2-3 hours seems to be when I’ve found it has shut off. Very disappointing, but I just turn it back on and come back a couple hours later to check it again. I went ahead and did the kickstarter for the S2 version they’re coming out with to get 360 degrees of heating surface instead of 180 degrees of surface. I hope they also solve the power off issue with the newer units. Some other reviews have suggested that the unit would need to be airtight in order to work. These people don’t understand thermodynamics… that heat rises and takes moisture with it. Ignore them. When this unit stays on it does exactly what it should do… it heats up the filament and drives out moisture. That said, it doesn’t get hot enough to fully dry filament, which is why I shove a bag or two of fresh dessicant into the center of the spool to help suck the remaining mousture out of the filament and surounding air. This seems to work reliably well. All that said, I wanted to like this enough to get a few more for all my printers, but I’m going to wait for the S2 version from their kickstarter before I consider purchasing more. This one seems buggy. If it’d just stay on like its supposed to, I’d give it 5 stars and already have several more. UPDATE: I returned the first unit I bought and got a replacement. The replacement has not had the same issues as the original where it would shut itself off after an hour or two, confirming my suspicion that the thermistor was bad in the first unit. I have since purchased 4 more of these (couldn’t wait for the S2’s) and none of then have had the early shut-off thermistor issue. They have their fair share of other design flaws, but I’ve designed solutions to those problems (a bowden tube adapter solved all the issues I was having) and, in fact, I’m launching a Kickstarter campaign to share my design with other S1 owners having the same issues.

Have not had a single clog since buying this item. Well worth the price!!!