• 1kg variant of the Infinity Flow S1 with automatic filament reloads for 3D printing and print farms.
  • GIF of Infinity Flow S1 performing automatic filament reload after filament runout detected by the runout sensor.
  • GIF of user loading filament into Infinity Flow S1 mid-print for print farms with filament runout.
  • Infinity Flow S1 lineup supports 1kg, 3kg, and 5kg filament spools, ideal for print farms and automatic filament reloading.
  • S1 automatic filament loader showcasing compatibility with various filament spool sizes
  • Infinity Flow S1 replacing Bambu AMS on Bambu Labs A1 for automatic filament reloads
  • Infinity Flow S1 dimensions chart for 1kg, 3kg, and 5kg filament spool variants, ideal for print farms.
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Pre-order - S1 - Automatic Filament Loader

Pre-order - S1 - Automatic Filament Loader

$179.99 USD
$179.99 USD
Sale Sold out

30-Day Return Policy

NOT FOR USE WITH TPU (or other flexible filaments)

Lead Time ~ 2 weeks
Roller Size
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Automatic Filament Reloads

Automatic filament reload on Infinity Flow S1 captured in a GIF for seamless print farm operation

The S1 takes the hassle out of 3D printing by automating filament changes and eliminating downtime. 

No more babysitting your printer or worrying about wasted filament—just seamless, uninterrupted printing so you can focus on what matters most: your projects.

Infinity Flow S1 transitioning between filaments during automatic reload for print farms

The S1 is designed for back-to-back filament transitions, automatically loading the next spool as soon as the first one runs out.

  • Seamlessly switches between two spools without stopping your print.
  • Automatically loads the next spool when the first one runs out.
  • Keeps your printer running continuously, no manual intervention needed.

No More Wasted Filament

The S1 uses every inch of filament on the spool to eliminate filament waste.

  • Maximizes filament usage by switching spools seamlessly.
  • No more wasted filament at the end of every spool.
  • Save money by reducing waste.

Reload Filament While Printing

GIF of user reloading filament into Infinity Flow S1 during active printing in a print farm setup.

The S1 allows live filament loading, meaning you can reload filament while printing to maximize your printer’s productivity!

Will This Work With My Printer?

Compatibility requirements for the Infinity Flow S1

The Infinity Flow S1 is designed to be compatible with most FDM 3D printers that use 1.75mm filament. It requires no firmware modifications, so setup is simple and straightforward. 

nfinity Flow S1 installed on various 3D printers, replacing systems like Bambu AMS and Prusa MMU with automatic filament reloads

 

All you need is an adapter to connect a Bowden tube to the inlet of your printer’s extruder if your printer doesn’t already have one.  

See Compatibility Guide

Customer Reviews

Based on 50 reviews
70%
(35)
28%
(14)
2%
(1)
0%
(0)
0%
(0)
K
Kelvin

Nothing to dislike about the product! It was easy to assemble and ran great as promised. I don't have to worry anymore about running out of filament!

K
Kirk MIller
This was our 4th loader.

No problems, except when the filament runs out the empty reel still attached to a stub of filament flies off. This is how we solved it. Added a heavy bold with a 3/4" sleeve and 2 large washers to give the empty reel some weight. A 1.5" plastic cylinder between the spools would have worked. Maybe next generation.

User picture User picture
J
Jared C
They changed my mind

I originally left a three star review, because it wasn't keeping up with my k1 max on slower prints. ( I ran 3 seperate prints without using the s1 and had flawless prins) so the problem had to be the s1. They reached out to me right away and we walked through the testing and steps to figure out the problem. I updated firmware and bam.
The only reason I can't give a full 5 is that I shouldn't have had to update the firmware.
But here we are 15 hours into a new print and I have had zero issues since the update. Thanks to the folks at infinity flow for making a great product that saves me time.
For reference to did place my s1 into a airtight tote. Drilled a couple holes to run the tube and power cord through and have 2 dessicated bags in, as my printer is im my garage.
Only thing I'd change or wish for is anti walk points on the roller for the different widths so they don't slide side to side, prohibiting smooth flow.

User picture User picture

So glad we were able to get you back on the right track. Let me know if you need anything at all in the future.

N
Ninja Boy
Great solution for long prints

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.

User picture User picture User picture User picture User picture
J
John

Very well built and worked as expected.. I liked it so much I purchased a second.

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Video

Other Resources

Compatibility requirements for the Infinity Flow S1

S1 Compatibility Guide

Discover which 3D printers work best with the Infinity Flow S1. This guide covers setup tips, adapter recommendations, and best practices to ensure smooth operation.

See Compatibility Guide

S1 Setup Guide

Set up the Infinity Flow S1 in as little as 5 minutes! This guide provides step-by-step instructions to connect the S1 to your 3D printer, ensuring smooth filament feeding and preventing filament runout issues.

See Full Setup Guide

Free Adapter STL Downloads

Some 3D Printers may need adapters to work with the S1. Our GitHub has free STL downloads for adapters that we have personally verified here at Infinity Flow.

See Our Github

FAQ

Does my printer need to pause during filament changes?

No, the S1 automatically switches filaments without requiring the printer to pause. It ensures a smooth transition between spools to keep your prints going.

Will the filament transition create defects in my parts?

The S1 is designed to make filament transitions seamless, minimizing any potential defects. The filament is fed smoothly to ensure the quality of your print is maintained.

Will the S1 work with my printer?

The S1 is compatible with most FDM 3D printers that use 1.75mm filament. We offer an adapter kit which include the most common adapter fittings. Many popular printers already have downloadable adapters from online sources, which you can print to use with the S1.

Can I use a 3D printed adapter?

Absolutely! You can download and print adapters from various online sources to fit your specific printer. 3D printed adapters work well with the S1.

Can I make my own adapter?

Absolutely! You can download and print adapters from various online sources to fit your specific printer. 3D printed adapters work well with the S1.

Does the S1 work with all filament types?

Yes, the S1 supports standard FDM filament types such as PLA, ABS, PETG, and others. Flexible filaments like TPU are not guaranteed to work with the S1.

Does the S1 do multi-color printing?

The S1 is not designed for color-changing or multi-material setups but focuses on automatic filament switching, ideal for extended prints with single filament types.

How does the S1 prevent print fails?

The S1 prevents print fails by automatically switching to a new spool when the current one runs out, so there’s no need to pause the print or intervene manually.

Does the S1 work for Bowden and direct drive extruders?

Yes, the S1 is compatible with both Bowden and Direct Drive extruders. Adapters may be required for different setups, and we provide guidelines on how to connect the S1 to your printer.

How does the S1 prevent filament waste?

The S1 allows you to use every last bit of filament on your spools when automatically switching to the next spool, eliminating waste.

Add-Ons

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Replacement Parts

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