Was trying to troubleshoot filament grinding issue, the titan tension was good. The grinding start when multiple rapid retraction occurs. Initially I have the retract length set at 7.5mm and adjust down to 3mm better but it still grinds during retract. I then stopped the print manually and try to push the filament by hand, as suspected it would not extrude by hand
The @Deltaprintr is mini and I did notice that while loading the filament it is very hard to go pass the brass push fit connector. I suspect this is the culprit.
Only one way to find out. Time to get E3D V6 and back to designing the holder gor it
If your filament feed stepper motor is not on the print head, the distance between the feed stepper motor and the hotend is too great/much and there is either too much resistance or slop/slack in the filament thus causing a lack of control and precision. It seems like the lower end (cheaper) models utilize this design!
@Fook_INGSOC , having the filament feed motor on the hot end results in more ringing due to inertia, slower prints, etc. There are tradeoffs. “Lower end”/“Cheaper” models would much more likely use a filament drive on the hot end, because doing a bowden system would add cost, not reduce it.
From what I have heard that hotend can have a tendency to jam if the insulation sock is pushed up too far. There needs to be air flowing across the heat break (3dprinting Nerd mentioned this on one of his reviews). So you are probably seeing back pressure related grinding because the filament is having resistance at the heartbreak.
@ThantiK
…makes sense, since having the feed stepper on the hotend would add extra mass, therefore more inertia…etc. I guess bowden tube with the shortest distance between hotend and feed stepper would be ideal!
