Y-Splitter for Bambu printers, and any other need for a PTFE Y-Splitter!

• Highly Optimized to work well, I've printed many hundreds of hours with mine fitted, including prints with hundreds (if not thousands) of filament changes each, and never had one problem.
• Threaded for PC4-M10 PTFE Fittings (UK: [https://amzn.to/3GD8zyM](https://amzn.to/3GD8zyM) / USA: [https://amzn.to/42Cqcr4](https://amzn.to/42Cqcr4) / DE: [https://amzn.to/48EwFoC](https://amzn.to/48EwFoC))

Please Note: Whilst it is possible to print faster (using thicker layer lines or faster print speeds, as per the print profiles posted by some others), this can and likely will affect performance as it'll affect how smooth the print and the surfaces are inside the filament guides. Please print with the profiles I supplied (Marked, ‘Designer’), I've heavily tested my profiles and can't guarantee that other profiles will perform as I've described.

What does it do?

Allows you to connect 2 sources of filament (eg AMS and external spool) without needing to swap over PTFE tubes each time you switch between them.

Why this one?

I had tried a number of the popular options around, but found I was often getting filament caught inside it or jammed and it was never something I could rely on to run my AMS through due to the frequent filament changes.

This has taken weeks to refine, and have gone through multiple printed revisions, each one undergoing testing and further refinement and I finally landed on this one. I've done a number of tests and have printed several prints with this connected, each with 50-100 filament changes with zero problems.

The EasySplit Afterburner 4 - 1 is now available for those needing to feed 4 filament sources into a single input.

Versions

All of the profiles of this item are of the original version apart from ‘EasySplit Lite’. The Lite version features the exact same internal structure as the original, providing the same, smooth flow of filament, but requires 30% less filament to print, and features a more sleek and compact frame.

Please note, the Lite version is not compatible with the mounts, but the mounts are not required and it is fine (even beneficial in some cases) to allow the EasySplit to hang held by the PTFE tubes.

How do I use it?

The splitter has an IN end and an OUT end.
The IN end has two holes, they are both the same and you can run any filament source into either.

The OUT end has just one hole and that should lead to your printer.

Each hole is threaded to take a PC4-M10 PTFE pneumatic mount (the push clips that PTFE tubes slot into).

If you need to buy more, these are high qualty reliable PC4-M10s.

Once your PC4-M10's are screwed in, slot in your PTFE tubes. 

The PTFE tubes going into the two IN holes you can push in pretty much as far as you want too (I'd advise not as far as they'll go but maybe 2-3mm before that).

The PTFE tube going into the OUT hole however is important that you push that all the way in.

As you can see below, a special recess has been designed for the PTFE tube to slot into and it needs to push all the way down into this hole to ensure the inner diameter lines up with the feed hole for the filament. It's also important to make sure your PTFE tube are cut neatly and straight.

Mounting
You have three options for mounting. I've designed and included two mounts specifically for the Easy Split (detailed below), but you can also just leave it free. I personally have mine connected up and it needs no mount (as pictured), but it depends how and where you'll want to use yours.

• Fixed Mount:
  The Easy Split slots onto this mount and it holds it in a single position.
• Swivel / Rotate Mount:
  The Easy Split slots onto this mount and it allows free rotation whilst fitted. It can be good if you'll want to swing it depending on if you're connecting your external source or not.

Both versions are available with holes cut for 8x3 magnets, or 10x2 magnets.

I've included a profile which contains all 4 mounts, with each one on it's own plate, so you can just print the one you want from that (or via the included STLs).

Print Settings
I highly recommend printing from the profile I uploaded included above as there has been a lot of tweaks made to ensure this performs correctly. If you want to slice it yourself though, here's the core settings:

• Layer Height: 0.08mm
• Wall Loops: 4
• Infill: 15% Gyroid
• Outer Wall Speed: 45-100mm/s
• Material: PLA

Parts
The non-printed parts you will require for this are 3x PC4-M10 pnumatic PTFE connectors, and depending on your set up, potentially some more PTFE tubing. Here are some links:

• PC4-M10 Pnumatic PTFE Connectors:
  • UK: [https://amzn.to/3Ytyj6V](https://amzn.to/3Ytyj6V) 
  • USA: [https://amzn.to/42Cqcr4](https://amzn.to/42Cqcr4)
  • DE / Germany: [https://amzn.to/48EwFoC](https://amzn.to/48EwFoC)
• PTFE Tubing:
  • Available from Bambu Lab (See B.O.M. below for link)

Tips

• Ensure your PTFE tubes are cut cleanly and straight
• Print using my profiles (Marked with the ‘Designer’ tag) which I've printed, altered and optimized many times, and heavily tested, to ensure it functions as designe .
• Although I have included a profile I've optimized for PETG, I'd advise printing in PLA. PLA has zero performance issues for this item and due to the artifacting that some people experience when printing with PETG, PLA will often perform better in this specific case.
• The mounts are only optional and should only be used if you need it fitted in a suitable place. I personally have it hanging free (as pictured)
• Whilst adhesion shouldn't be a problem with this design, 2 of the 1200 people who have downloaded the primary profile have mentioned they've experienced adhesion issues, so I've added an additional profile which should help aleviate these issues. I'd suggest trying the main profile ("Highly Optimized (PLA)") first though.
• When screwing in the PC4-M10 connectors, please bare in mind that whilst the thread and diameter should always be the same (providing it is a PC4-M10), some manufactureres may make slightly longer threaded sections, so when screwing them in, don't over-tighten as your PC4-M10 may be longer than the threaded section in the EasySplit, and it could then cause it to crack whilst fitting. Tighten firmly, but don't over tighten. I should note, that of the more than 10,000 people who have printed this successfully, less than 5 have mentioned this has happened to them, so it's not a big concern, but good to be aware of.