A1, A2L Swiveling PTFE Tube Guide - Parametric

Bambu A1 and A2L Swiveling PTFE Tube Guide - Parametric, with Print-in-Place Ball Joint

If you've ever glanced over mid-print and noticed your drybox or your AMS Lite slowly sliding toward the print bed - pulled there by a taut filament tube - this one's for you.
 

PTFE tube management is one of those details that seems trivial until it isn't. A loose or unsecured tube puts real tension on whatever it's attached to: a desktop spool holder, an AMS Lite, or a drybox on a shelf. Some existing guides rely on a dovetail joint or a friction fit that works fine in theory - until the repeated motion of printing slowly works the joint loose, and by the time you notice something is wrong, your setup has already been dragged somewhere it shouldn't be. I learned this the hard way so I designed my own.
 

My design uses a fully print-in-place ball joint: it articulates freely so the tube always follows the print head without resistance, but the ball is physically captured inside the housing - there's no clip, no friction fit, nothing that can pull apart under load. The lever is printed horizontally so its strength doesn't rely on layer adhesion at all. And the C-clip uses a carefully angled opening that holds the tubes in place during normal use.

Fully Parametric

Configure four values to match your setup:

• Guide placement - top of the printer (usually for external spools) or towards the front (usually for a side-mounted AMS Lite)
• Guide diameter - size the C-clip to your tube count and diameter
• Lever length - a short lever works for most prints; increase it if you frequently print very tall models and need more slack
• Ball joint offset - position the guide towards the front, center, or back of the top bar

Pre-configured standard variants are published alongside this model, so if your setup is typical you can go straight to printing without touching a single parameter.

Printing note

After printing, gently move the lever in the joint until it becomes loose and starts swiveling. 

Longer lever variants require a small horizontal bridge support under the lever. The included print profiles handle this automatically.
 

Happy printing !