Lines in print
Hello,
I tried a lot already but it seems that I can't get my i3 mk2s not properly adjusted.
The xyz calibration turned out ok.
Z live adjustment at about 0.300.
I have an Ultimaker 2+ for print comparison. The same prints always turn out to be much better. With the Ultimaker the have a kind of shimmer to them.
But anyway, my main problem is lines, that seem underextruded, in the middle of my prints. I'm printing lithophanes, which makes the lines super visible lit from the back.
I added two pictures to illustrate my problem.
Today, for the first time, I had two prints fail because the filament got stuck.
Any Ideas?
Thanks
Jens
Re: Lines in print
My guess is this is a slicing issue, around either the extrusion setting (have you calibrated it?) or the temperature for that particular filament.
Since you are having a jam well into the print, that could be a number of things but the most likely to me (given I can't see your set up) is that the temperature is too high, and the side cooling fan can't keep the heat break cool enough (is your room or enclosure particularly warm?) and the filament is getting melty up in the heat break and causing a clog.
The other common cause is that you have the tensions screws on the extruder a bit too tight. They are causing the filament to deform before it goes into the extruder causing problematic feeding and jamming. They should be set 14mm from the body of the extruder (with NO filament in it.) This is looser than is intuitive to me (I really wanted it to grab the filament to make sure it pushed in - that is actually problematic.)
Other causes can be found here:
So, I think you should try:
1) Calibrating your extruder.
2) Decrease the temperature some.
3) Check the tension on your extruder screws.
Let us know what these do...
Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss. If you solve your problem, please post the solution…
Re: Lines in print
What do you mean by "They should be set 14mm from the body of the extruder"? Is that the length of the spring itself (in between the two washers, red lines in picture)?
Re: Lines in print
Yes. The distance from the washers.
Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss. If you solve your problem, please post the solution…
Re: Lines in print
I have finally found the solution to this problem.
I set up a, way to high, 7 mm retraction. That let the extruder bite into the filament.
Thanks for the quick answers. I learnd a lot troubleshooting this problem.
Re: Lines in print
Last week I hat the same problem. It turns out, that the extruder tooths are clogged with filament. After fast cleaning with a needle I was back in the game.