Filament Y-Splitter for Bambulab AMS - Print in place PTFE clamps

Instead of using pneumatic fittings, as most y-splitters do, this one has built in clamping for the ptfe tubes. It is designed for Bambulabs ptfe tubing, which has 2.5mm inner diameter, but it is also briefly tested with Capricorn ptfe tubes which has 1.9mm inner diameter. For me it has worked flawlessly with both, but with much less friction using the Bambulab ptfe tubes.

You can use whatever ptfe tubing you want on the inputs. But if you use tubing with smaller inner diameter than 2.5mm on the OUT connector, make sure you have a clean filament pass through before installing it on the printer.

The splitter is designed to be printed in this direction, with 0.2mm layer height. Ignore the warning about floating cantilever, the print in place clamps has a floating layer by design. Do not reorient the model or enable support. I printed mine in PETG, 50% speed, on the X1C and P1S printers and have not tested it in any other materials.

After printing you should first run some filament through from both inputs, AMS and EXT, to clean out the channels in case it is any stringing or "blobbing" inside the channels.

Then you must break open the print in place clamps by pressing a 4mm shank in through both inputs, AMS and EXT and the output, OUT. I used a 4mm aluminum knitting pin with the tip cut off.

I do recommend testing the splitter by running a length of filament through by hand, with three short pieces of ptfe tubing installed, before permanently installing it on the printer. It is natural to have a little more resistance from the EXT input, because of the curved channel, this is not a problem as it will be loaded manually anyway. From the AMS input the filament should run with very little resistance.