Better quality?  

RE: Better quality?

What is the source model? What is the filament material, settings used?

If this is a calibration cube then that may be a partial nozzle clog, slipping gears on the extruder causing uneven extrusion, very low quality filament with uneven diameter ( also causing uneven extrusions), wobbly print head ( uneven extrusions) ....

Sorry I dropped my crystal ball, and I cannot read your mind due to clouds 🙂

@_kaszpir_ has a point...

I suspect your belt tension needs attention - but first dry the filament, run the built-in first layer Z offset calibration and show us the resulting print *on the print sheet* then print you cube again with the dry filament and show us the result.

Cheerio,

RE: Better quality?

i use prusa mini and i bought new PETG today, still in my first layer the surface looks first good, then the edge starst rising i dont know what causes this

RE: Better quality?

RE: Better quality?

230 °C for PETG? Depends of course but my ongoing print is 265 (generic El-Cheapo material). And is this a 0.4 mm nozzle? I hope it's not trying to print (display reading) at 0.35 mm...

If there is nothing else wrong with the printer, I'd bet my money that the nozzle needs to go down, 100µm..200 µm or even more.

RE: Better quality?

Okay i will try higher printing temp and lower the nozzle

RE: Better quality?

My z offset was 1.295 

RE:

Sanity check: Use a standard sheet of printer paper (80 grams / squaremeter). Move head to Z=0.1 mm = 100 µm. Set Z offset so the nozzle causes some friction on the paper which gets stronger when you place a finger on the head, pushing down slightly (my routine from a "dumb" Klipper printer without wizards). That's how I align toolchanger nozzles, typically going down a few 10µ steps printing 1-minute test chips after the paper "coarse alignment".

Edit not sure if the Prusa GUI allows 0.1 mm, might be hard without GCODE command line. You could set Z=0.000 mm and do the above alignment, then move down by 100 µm.

RE: Better quality?

oh, and ideally done at printing temperature (thermal expansion) but be aware that 260 degrees on the same spot will burn a hole into the print plate. 150 °C should be a safe compromise.

RE: Better quality?

I recommend to read/watch this for quick and easy way to improve first layer/offset setup https://www.printables.com/model/107639-first-layer-calibration-prusa-mini

RE: Better quality?

I recommend to read/watch this for quick and easy way to improve first layer/offset setup https://www.printables.com/model/107639-first-layer-calibration-prusa-mini

RE: Better quality?

how can i print that with only the gcode

RE: Better quality?

this is with z 1.570 and 250 C 

RE: Better quality?

RE: Better quality?

Forget GCODE, looks you're getting there. 

@_KaszpiR_ posted official instructions above, that may be worth a read. My advice is generic, not for this particular printer.

If you want to print test chips like the one you're holding (and maybe half the size then it's four times faster), you may slice for a lower layer height just to set Z-offset (it gets more sensitive so the change from Z offset is observed more clearly). When happy with the result, print the object with the original layer height, Z offset remains unchanged.

And did I mention, dry (and I mean "really" dry) filament matters...