There are several variations out there if that one doesn't fit. The black plastic piece can be pushed in by the movement of the print head which allows the bowden tube to slip. That clip prevents that from happening.
I see you have the same benchy imprints as I do (feel better that I wasn't the only one to do that). You may need to check your z-offset. If the nozzle is too low it cause excess pressure in the throat. @Rai
Another thing to check is your hot-end temperature. If it's too hot ... or left hot too long without printing ... it can burn the filament (turns a brownish color). Also, make sure the thermistor is all the way in so you're getting more accurate readings. @sebastian waters The stringing in your pic might indicate too much heat. See here:
Finally, when you remove the filament, be sure to heat up the tool (hot-end) first. That will prevent the filament from breaking inside the hot-end.
[edit] Also, a heat gun is very effective for clearing out the larger bits. A hair drier might also work, but I haven't tried. Acetone is less effective on PLA. So I clean with heat 1st, then use acetone to clean any small bits caught in the threads.
@andrew leroy thanks for the tip. i did make this mistake during my first few prints but i did correct notice that and corrected it and that solved the serious stringig i was having at the start. i believe the stringing im seeing now is due to a small amount of filament still being in the nozel after the retraction. in the purge tower there is a centre coloumn which is used for wiping this string. maybe i havent enbled the wipe setting for both filaments I will have to check later. Im not using the printer anymore until my linear rails turn up and possible my new hotend as well.
Print one of these:
There are several variations out there if that one doesn't fit. The black plastic piece can be pushed in by the movement of the print head which allows the bowden tube to slip. That clip prevents that from happening.
I see you have the same benchy imprints as I do (feel better that I wasn't the only one to do that). You may need to check your z-offset. If the nozzle is too low it cause excess pressure in the throat. @Rai
Another thing to check is your hot-end temperature. If it's too hot ... or left hot too long without printing ... it can burn the filament (turns a brownish color). Also, make sure the thermistor is all the way in so you're getting more accurate readings. @sebastian waters The stringing in your pic might indicate too much heat. See here:
Finally, when you remove the filament, be sure to heat up the tool (hot-end) first. That will prevent the filament from breaking inside the hot-end.
[edit] Also, a heat gun is very effective for clearing out the larger bits. A hair drier might also work, but I haven't tried. Acetone is less effective on PLA. So I clean with heat 1st, then use acetone to clean any small bits caught in the threads.