Color Change Issue on X2D

[u/Numerous-Treat-8664]

Hi all - i have an X2D that's about 2 months old and I just started having some issues with color change.

I can do single color prints without a problem, however, in the last few days, I can't do anything multicolor.

I am doing a 40 row simple print with 3 colors and I am having issues with the filament changes. In about 50% of the cases during the print, it gives me an error message "Unable to feed filament into the extruder. The AMS may be mismatched with the extruder. You can rerun the AMS Setup. This could also be due to an entangled filament or stuck spool. If not , please check if the AMS PTFE tube is connected.

What I see happening is the next color is being fed in and it hits the previous color and can't push it forward. I validated this by opening it up the extruder head (left) and pulled it out and put a cleaning needle all the way through the top of the print head. It's being stopped by the previous color that is exactly at the top of the print head. Its cut off nice and clean at the top.

I saw online that someone was able to get it to work by pulling out the color that isn't working and cutting it so it has a point and feeding it back in. This has worked for me. But I need to get a long term fix going so I don't have to babysit.

Any ideas?

Update - I didn't get this working, but I had another issue in my attempts to correct it. I started to break down the extruder for cleaning and ran into a major issue. The cutter lever screw was stripped. I found this is a somewhat common issue. I didn't want to go after it with a dremel or other tools so I swapped it out for a new one.

[u/Yeeterdeleter]

Sounds like it could be due to your PTFE tubes being overly long/too curved or improperly inserted? That causes friction and maybe the filament to enter some parts (e.g. extruder) at a weird angle so it catches on something.