Just got my S1 Plus and it is Fantastic! Installed it on my Ender 5 Max and no issues. Only thing I did is remove the filament sensor from inline and went direct using a coupling. I plan on replacing the PTFE tube with one solid run to get rid of the joint and remove one more possible point of failure. I also purchased the auto-cutters, work great as well. Had to test. Great machine. Make the huge build volume of the E5M very usable and no more waking up to filament out errors massages. 😎
Thank you for designing this.

Easy quick set up

I run a print farm and recently installed several Infinity Flow S1 units. So far, they’ve been working great and have significantly improved our workflow.

One of the biggest changes we’ve made is transitioning away from 3.5kg spools back to standard 1kg spools. At first, this seemed like a step backward—larger spools meant fewer swaps—but in practice, it’s been the opposite. With the Infinity Flow S1 handling spool changes automatically, downtime is reduced. Previously, we’d often find printers sitting idle, using electricity and waiting for someone to swap filament, sometimes for hours. That kind of pause not only kills efficiency but often results in defects when the machine resumes and wasted filament.

Now, with these units in place, we’ve cut our exposed filament inventory nearly in half and improved print reliability. Fewer delays, less defective prints, an easier management of spool swaps.

All in all, I’m very happy with how the Infinity Flow S1 units are performing. They’ve solved real, daily issues in our operation, and I wouldn’t hesitate to recommend them to anyone managing multiple machines.

My use case for the S1 came about as I was about to print 4 x 10” custom rim & tires I designed to replace the standard hard plastic ones on my grandson’s 24 volt ride on toy C8 corvette car. I printed the rims in PLA+ and the tires in TPU. They used a lot of filament (20 hr print time for the rims) and I couldn’t let them run overnight unaccompanied because Murphy’s law says the filament would have definitely run out. The S1 works great and I have it switched on/off in tandem with my main printer. A highly recommended product.

Overall, I think the S1 is a great product that solves a specific problem for my single color farm printers better than the alternatives (DIY or AMS). I love that it will work with any printer I have or can see myself using commercially in the near future.

Awesome product that solves a big issue with 3d printer especially when printing bigger objects. No longer need to swap half used spools for big prints and have to worry about your filament running out in the middle of the night. Currently using for my Elegoo Orange Storm Giga and will also be buying it for my Elegoo Neptune 4 Max and Anycubic Kobra 2 Max. The 5 kg model is awesome because you can use it for any filament size.

I love this thing! I had be working to build something similar, but when I saw your product I was over it and ordered 3. Works like a charm!

It just works! I've been wanting a solution like this for years! Not only does the S1 handle continuous printing for me, but it also relieves the strain of my extruder from pulling filament all of the way from the filament dryer. It's the perfect pair with a two spool dryer!

The infinity flow is pretty darn cool and solves a huge need I had with my kit printer, which has long PTFE paths. It's long been a pain for me to just load filament, let alone deal with changes mid print. Now I don't have to worry about that! It's been really nice to just set and forget with multiple spools.

The only failure I've had has been a spool that was tangled on itself, nothing the infinity flow or printer can do about that. I had 5 or six spools that I wasn't comfortable enough to use them for anything but couldn't throw out in good conscious, but now all the filament from them is used up and I can get rid of the spools.

Took about 15 minutes to assemble. Easy. Installed it on my Sovol SV08 to test it out. It loaded the filament with no issues. It's working great and keeps up with the speed of the printer easily. No more having prints stop in the middle of the night on filament runout.

I am an additive manufacturing engineer and I recognize that this is a good product. I hope they come out with a filament dry box. The build quality of the actual unit is sound and compact. Seems to work well with cardboard and plastic reels. The mechanism works as intended. When it encounters resistance from meeting my tool head the motor stops.