Nozzle scratches over infill

Vertex 3D Printer Vertex - Issues while printing
1

Hello everybody,

nearly fixed all problems of my first 3D printer K8400.

Now I tried to print those spacers to calibrate distance between rods but I have had problems with the infill.

During infill, the nozzle seems to scratch over the infill, maybe because its hardened out too high.

How can I fix this problem or is this “normal”?

I am running repetier host on mac and using the latest slic3r from website.

Maybe I can fix this with the right settings.

This Video shows the problem: https://www.youtube.com/watch?v=s8nwstoBZok

Thank you in advance.

2

What temp are you running?
190C should be good for PLA.
Have you tried decreasing the flow rate?

3

As Wrongway said decrease the temperature to 190° and the flow to 75%.
Don’t use more than 50% infill (30-40% is enough most of the time). You should get better results then.
And while you’re at it change the retraction to 3 mm - 150mm/s.

4

Thank you for the information. I have changed the settings and will check tomorrow.

My temperature was by default 210°C, flow 100%, retraction length 2mm and speed 40mm/s by default.
Dont know why but my infill was at 100% :slight_smile: changed it too.

There are 2 options for the retraction:

  • retract on layer change
  • wipe while retracting

Should I check one of these settings?

5

Why are you using Slic3r? Cura gives better results imho.

[quote=“vlknshngz”]Should I check one of these settings?
[/quote]Only the first one.

6

Cura is not available for repetier-host on mac. Only as stand-alone software but I dont have the right configurations for Cura at the moment. I have installed it but haven’t configured it right now to work with my K8400. Is there a file or a Link where I can get all the settings for Cura?

Edit: tested Cura as stand-alone software with the settings you told mentioned. Works very well. Thank you for your quick help/solutions.