It's PLA, 200 °C, 50% fan, printed on Anet A8.

3D Printing
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1

It’s PLA, 200 °C, 50% fan, printed on Anet A8. What is wrong? The temperature? The cooling? Settings of retraction? Thanks for any advice.

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2

Looks like 2 or 3 things to me.

  1. Over Extruding. Try set your extrusion multiplier to 0.9 or 90%
  2. Try retracting faster, and more distance. Good settings for myself on a bowden setup is 2mm retraction at 30mm/s
  3. Print it 5 to 10 degrees hotter.

You can even try 1 of these at a time to help you understand if it’s getting better or worse, I don’t suggest changing everything at once, because maybe you need to print colder, and not hotter, and it you won’t know which setting helped or made it worse.

3

I had that problem with a friends printer recently, and in his case it was that the extruder wasn’t retracting properly and all we did to cure it was turn the stepper driver up a smidgen. I can’t say for sure that this is your problem however.

4

Thanks guys, the problem was quite interesting. The heater of the hot end slipped out a little (like 2/3 of its length), so the thermal sensor was completely in the air and who knows what was the actual temperature of the hot end (I guess it was much higher than 200°C). I have bound the cables from the heater to the carriage so it’s now less probable to slip out again.