Snapmaker U1 top 2x-spool mount w/ PTFE connectors
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A top mounted spool holder for the Snapmaker U1.
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Here is a top-mounted double-spool holder for the Snapmaker U1, with PTFE connectors for the 10mm tubes that come with the printer. I needed this to bypass the regular filament path when working with sub-95A TPU. I found even 90A TPU had issues with filament path resistance, causing my prints to fail.
The spool holder can handle two spools and can be mounted on either side of the printer. I designed this to work with the Bambu Lab AMS Lite spool mounts because they are spring-loaded to prevent too much unwinding. The arm-holes in the spool post are designed with the old-style twist-lock Ender 3 spool holders in mind, and can easily be modified to work with other designs (including the Snapmaker ones) by re-using the twist-lock base of the arm.
Some parts of this model were taken (PTFE Holder Swivel PC4-M10, and PTFE Holder top) or modified (PTFE Holder Bottom/PTFE Holder Bottom Flat) from this design by HimAgain (https://makerworld.com/en/models/1849294-pc4-m10-a1-dual-external-spool-holder-2025?from=search#profileId-1976556) as I absolutely do not have the CAD skill necessary to model them. The unmodified parts are included here for convenience.
You will need some additional hardware for this build:
3 M4 x 6mm SHCS
3 M4 x 10mm SHCS
7 M4 x 5mm heatset inserts
2 PC6-M10 Pneumatic Tube Fittings (I bought these from Amazon Haul: https://www.amazon.com/dp/B0FSQZD654?ref=ppx_yo2ov_dt_b_amznbzr_ppx_yo_asin_title&s=bazaar)
You can either reseat your existing PTFE tubes into the arms on the spool holder, or order an additional set of PTFE tubes (like I did) from Snapmaker, should you want to trim them a bit.
The heatset inserts go in the side of the top bar and the bottom of the spool post. The M4 x 6mm screws are used to secure the spool arm lock to the side of the top bar, while the M4 x 10mm screws are used to secure the spool post to the top bar's underside.
The rest of the assembly should be rather intuitive, but if you have questions, please feel free to ask.
I recommend printing using the 3MF, as supports are painted on manually, and using automatic supports could cause fitment issues, especially with the threaded parts. I printed this in PLA, but you can use another filament if you want.
I hope you like this model, and find it useful. Thanks!