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Printing settings Trouble

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i noticed that i can't print at 0,1 if i do so the result is this:


I always have to print at 0.06 for best results...but the time is not forgiving...

And even at 0,1 there almost every time this kind of behaviour:


Is it normal?

I use Ultimaker2 with PLA default settings.

How can i solve?

Thank you very much!

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You should always print the bottom layer at .3mm. You need to level the bed with an accuracy about 1/3 of the bottom thickness. So if you print bottom layer at .3mm then you only need accuracy of about +/- 0.1mm but if you print bottom layer at .1mm then you need accuracy of .03mm which is extremely difficult as the glass isn't really quite that flat. Cura has a special setting for the bottom layer height different from the normal layer height.

What you are showing is underextrusion and underextrusion on the bottom layer is usually caused by this.

however if you are getting underextrusion on the 2nd and 3rd layer then you have a different problem - simply printing too fast or maybe your printer needs some minor work. There are about 50 causes of underextrusion but the 3 most common are "printing too cold/fast", teflon coupler is deformed, and "partial nozzle clog".

Here are my recommended top speeds for .2mm layers (twice as fast for .1mm layers):

20mm/sec at 200C

30mm/sec at 210C

40mm/sec at 225C

50mm/sec at 240C

The printer can do double these speeds but with huge difficulty and usually with a loss in part quality due to underextrusion. Different colors print best at quite different temperatures and due to imperfect temp sensors, some printers print 10C cool so use these values as an initial starting guideline and if you are still underextruding try raising the temp. But don't go over 240C with PLA.

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