New Update:
i changed the Power Supply.
I took the Frequenzy Converter of the Tillboard. At the Moment the Spindle ist started and stopped by Hand.
My test is a rectangle 50x50
1 Layer in 0,5mm and after that
1 Layer with 0,1mm, starting at 0,5mm
After the first run i repeat instantly without touching the Settings.
When in the 2. Run, the Spindle is at 0,5 i hear nothing.
When its at 0,6mm i can bearly hear and see that some Material is getting off.
Let it be 0,05mm or Less. For a CNC out of a 3D Printer, im fine with that.
BUT When i connect the Frequenzy Converter to the Tillboard, the Error comes back.
I ordered ferrit cores to see if that helps.
But im very close 
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