K8400 Print Quality issue

Vertex 3D Printer Vertex - Issues while printing
1

I’m trying to set “cura” for good prints.
But on some items I have this problem, it is perfect inizilamente then begins to create defects on the perimeter.
What can be?

Thank you

Note
Setting:
Speed: 35mm/s & 150mm/s(move extr)
Temp: 335°
Filament: Abs 1,75
Layer 0,2mm
Retraction active

2

335???

3

sorry 235

4

After changing the parameters of speed, acceleration, retraction filament, these are the results …

They are not great (there is some shortcoming) but we’re almost there.

5

Your prints look far better than the first one. Not much you can improve imho.

6

Look at the results of a € 2.290 ready2print available machine…

And make sure U take all this in consideration:
[ul][]YOU build this printer yourself (I assume not a professional who does this every single day)[/]
[]YOU tuned it yourself (I assume not a professional who does this every single day)[/]
[]And all that for a fraction of the cost price of what a “Good” commercial ready 2 go printer costs.[/]
[]And YOU can print pretty slick 3D objects that could compete with those expensive printers created ones.[/]
[/ul]

Yours look just perfect!