Strange Loops of the filament

[GeorgB 0]

I have in the print such loops or bows of the filament.

ABS, 260°C, bed 90°C, speed 40mm/sec.

I changed speed, but my impression this is not changing.

I am using this filament in another machine with no problems like this.

Has anyone in an idea, what I could test?

[DidierKlein 729]

It could come from the model, have you checked in layer view if you have these artifacts?

[GeorgB 0]

The artifacts are not visible in the layer views.

I preinted the model 3x times and the artifacts are always on the same position!

So maybe it is in the generated code. The Model itself is clean.

Shows Cura the real gcode?

[GeorgB 0]

Now I use slic3r instead of Cura and all problems are gone ...

I have no idea, what is my problem in Cura..

[GeorgB 0]

I tried with Cura - it looks quite different.the stripes change postion with the speed. if you move the nozzle head (UM2, of course power off) do you feel any resistances? If I move the head, I feel not the same resistance over the movement.

With Cura I have the issue that the perimeter goes sometimes outside the model. It is reproducable, it is always on the same points- but not visible in Cura.

Any ideas ...??

[Labern 774]

can you see any issues under x-ray mode. (any red parts)

you could try turning off fix horrible.

[GeorgB 0]

@Labern: thanks for your email.

in x-ray mode all is blue, so no red elements

I do not understand what you mean with: "you could try turning off fix horrible."??

Can you help me?

[Labern 774]

In cura if you go to Expert settings then you will see fix horrible and a few check boxes. if the model is fine they can all be turned off

[GeorgB 0]

Now I understand, I use the german version. In the expert settings is a "automatic repair" with 4 check boxes. All are already turned off.