I got fed up with the grinding of filament with my old primary cold end. I went nuts trying to remove the grub screw from the hobbed bolt and ended up in the end just needing a flat head screwdriver to pry it some. sighhh… Now, I have my new cold end in a temporary placement and after tightening down the tension screw some I no longer have to worry about it grinding filament. I have a problem though…
My new cold end is bucking. Yes, it tries to push filament , goes so far and then hops back. I have experienced this with the old cold end too. At this point, I have to assume that there is something wrong with the insides of my hot end that is causing friction.
Trying to get the bowden tube out of the hot end, I noticed that the quick fit connector was hot. I also noticed that the bowden tube was pinched, but that was probably because the stubborn thing did not want to disconnected. Could it be that the inside of my hotend has something wrong with it to cause the heat to creep up past the peek hotend insulator? My filament does seem to curl to one side even after multiple pulls.
Here is a link to my hotend: http://seemecnc.com/collections/parts-accesories/products/seemecnc-bowden-hotend
I once had the temp way higher than it should have been, so I imagine that could have messed up this one stupid piece of liner inside the nozzle.
What do you folk think? Tips on resolving my issues?