MMU PTFE Tube Guides

I was having a ton of trouble with skipping on my ERCF, and realized that my PTFE tubes were getting pulled into a tight 90-degree angle when the extruder was trying to extrude, causing a ton of friction. So I designed these generic tube guide mounts (passthrough and PC4-M6 variants) to help guide the PTFE tubes in a reliable way up to my MMU unit.

For ERCF users, the holes are spaced the same distance as each ERCF block tube input, so try to mount this directly in-line with the unit!

Model in Pictures

In my pictures, I am using the “Tube Guide - Angled - Long - Split - Passthrough - x6” model but included the other models I tried out as they may be helpful for others. The “Angled” models have mount points at a 25-degree angle.

Printing/Mounting Details

These were designed with mounting to the back of the printer in mind, but theoretically, you can use them anywhere to constrain the tubing path.

“Passthrough” models will just accept the PTFE/FEP tubes (it is a snug fit!), “PC4-M6” models will accept PC4-M6 couplers (this will add friction though!) - to secure the PC4-M6 couplers, you will need to print some of the “PC4-M6 Nut” models

The models with the “Split” keyword have a cutout in the center of the model to allow you to run cables through it (IE if you mounted your MMU on top of your printer like in the included pictures)

You can use 20mm~ m3 screws to mount the “Long” models, and 10mm~ m3 screws for the “Short” models.

Happy printing!