This just started happening. What could the reason behind it? I have a E3D v6 hotend. My retraction setting is 2mm.
Could I print a small pipe to guide the filament to the bowden tube?
If you don’t have any extrusion problems any further down the path, then yes a closer entry can help.
I had a similar problem on my FF Creator Pro and it appears to have been a problem with the extrusion rate, i.e. the printer was trying to push more filament through than was being used. You could try adjusting your extrusion rate or alternatively set a fractionally lower diameter for your filament (e.g. from 1.75 to 1.73).
On the FF there’s a plastic guide that fills the gap beneath the hobbed gear/bearing. It does look like you’ve got an awful lot of unguided space in there, which probably isn’t helping…
I used a piece from the hotend trheaded pipe for guidens
I drilled out the center of my PTFE connector, and slid the Bowden tube down through the connector until it was just touching the gears.
I haven’t had this issue since.
Ideally the filament path should be supported starting as close to the drive gear as possible. If it’s PLA it should be rigid enough to not kink in a gap that size but you might want to up your temp/slow it down and print a part to support that filament path.