The Smoothy - Y Splitter Connector

Meet the Smoothy!

The Smoothy is a PTFE Bowden Tube Y Connector designed for smooth filament transport without catching or binding. This allows you to use an external spool with your Bambu Lab machine without disconnecting your PTFE Bowden Tubes.

PTFE tubes are inserted deep into the connector for less wear on the FDM material. This allows for silky smooth operation.

As the filament progresses towards the output, it passes through a precisely-designed taper that mates perfectly with the output bowden tube.

All PTFE tubes must be inserted until each “stop” is reached (see cutaway diagram).

Connectors must be the black type (not blue). The black connectors allow the PTFE tube to “pass thru” which is required for the design to work smoothly: https://www.amazon.com/gp/product/B0B97RWKQR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

BENEFITS:

• No Supports
• No Overhangs
• No Brims
• Optimized Geometry
• Designed for FDM Printing
• Smooth Operation
• Supports both PC4-M6 and PC4-M10 “pass thru“ connectors
• Free to Download!

UPDATES:

• The Smoothy Mount is now available! Download here: https://makerworld.com/en/models/18190 The mount is not required, but available to those who prefer to attach the Smoothy to their machines. Without the mount, it can simply rest in-line.
• Both PC4-M6 and PC4-M10 connectors are now supported.

TIPS:

• Make sure ALL bowden tubes are FULLY inserted until each one reaches its stop point. See cutaway diagram for an illustration.
• The output tube does not insert as deep as the input tubes.
• After inserting each tube, you can rotate the tubes back and forth while pressing inward slightly to make sure they're seated squarely and fully.
• Glue Stick is recommended.
• PTFE tubes must be cut squarely at the tip (no angled tips).
• All PC4 connectors must be installed for a completed design with smooth operation.
• Tested with a 0.4mm Nozzle and 0.2mm Layer Height.
• Print vertically with wide dual-port side on the bed.
• PC4 connectors typically have tapered threads. As such, make sure you don't over-tighten them as they can create a “wedge effect” and can cause damage.

NOTES:

• These work well printed in PLA. More durable materials can be used, but it may require clearance adjustments.
• I’m currently using this for my Bambu Lab X1C with an AMS, which utilizes an external spool.
• This is the first model that I'm sharing, I hope you enjoy it!
• The Smoothy can be used commercially, but can't be resold.