Weird wrinkles in the top solid layer
Good morning, I use PS 2.5 with my fully customized CoreXY. I am experiencing a terrible issue, as you can see in the photos in the top most layer they appears those horrible wrinkles, they do appear ONLY in the top most layer, in the lower layers they don't occur...I have setted 4 solid layers for bottom and top...Any idea about the cause? I print at 150 mm/s but for the topmost layer I reduce the speed at 80%. I've tried to lower the speed but nothing seems to change...I'm afraid I've touched some setting wich I shouldn't touch....
Any idea?
p.s.
This problem occurs with all the horizontal top layers in different STLs so it is not an STL-related issue..It happens no matter the top layer surface (of course in smaller surfaces the wrinkles are smaller as well)
Fully customized CoreXY based on TronxyX5S chassis. E3D Revo Six extruder, Original BMG, Dual 24VDC Power Supply, Build volume 320x320x350