Infinity Flow S1 - 3D Printer Compatibility

The Infinity Flow S1 is built to simplify filament management for a wide range of FDM 3D printers. With a modular design and a universal approach to spool loading, the S1 seamlessly integrates into most setups, eliminating downtime, hassle, and filament waste.

While many printers connect smoothly to the S1, certain printers need a bit more help to work their best.

For example, the Bambu Labs P1 series printers integrate seamlessly with the S1, taking less than a minute to set up, while some printers like the Pursa MK4 may require an easily 3D printable adapter. Read our case studies below for more details on these setups.

Requirements

The Infinity Flow S1 is designed to work with most FDM 3D printers. It’s a passive, hands-off system that detects filament movement using force-sensing feedback, allowing it to mimic your printer’s extruder without any firmware changes.

    The S1 is compatible with both Bowden and direct drive extruder setups. Its modular design means it can be adapted to many printers, even if some require minor adjustments to get started.

      • Filament Size: 1.75 mm filament only. The S1 is optimized for this standard filament diameter.
      • Bowden Tube Inlet: Your printer needs a Bowden tube inlet at the extruder.
      • No Firmware Changes Required: The S1 integrates directly with your printer’s setup, so no firmware modifications are needed.

      How to Adapt the S1 to Any Printer

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      Solution 1: Check for Direct Bowden Tube Compatibility

      See if a Bowden tube can be connected directly to the inlet of your printer’s extruder.

      Many printers have this inlet pre-installed and ready for quick connection.

      This image shows the Bambu Labs P1S connected to the S1 using a Bowden tube coupler

      Solution 2: Explore Our Verified Adapters on GitHub

      Visit our GitHub repository for a collection of adapters we’ve tested and verified in-house at Infinity Flow.

      These adapters are designed specifically to work well with the S1, ensuring compatibility and reliability.

      Solution 3: Browse Online for Adapters

      Check community sites like Printables, Thingiverse, and MakerWorld for Bowden inlet adapters, often labeled as “MMU adapters.”

      Things to Look For:

      • MMU-style fittings to connect the Bowden tube
      • Smooth transitions between parts in the filament path to prevent snagging
      • Sturdy support for the Bowden tube to maintain a secure connection

      Things to Avoid:

      • Filament paths wider than 3 mm in diameter, which can lead to misfeeds
      • Sharp edges or catching points within the filament path that could cause jams

      Solution 4: Design Your Own Adapter

      Use CAD software such as Fusion 360, SolidWorks, TinkerCAD, or FreeCAD to create your custom adapter.

      Design Tips:

      • Build around an ECAS04 or similar fitting
      • Maintain a tight filament path: Keep the internal diameter no larger than 3 mm for consistent filament guidance and to prevent jams.
      • Ensure smooth transitions: Design all parts of the filament path with smooth, rounded transitions to prevent snagging or friction.
      • Support the Bowden tube: Include a solid structure around the Bowden tube inlet to prevent it from shifting or detaching during printing.
      • Avoid sharp edges or catches: Check for any small gaps, ridges, or points that could catch or damage the filament as it feeds through the adapter.

      Adapters