Printer is Folger 2020. Printing ABS at 245C, bed at 100C, e3dv6.

Please see attached pictures for two 50x50x2 calibration cuboid prints. Top has a rough surface and not sure why.

First layer / bottom of the print looks perfect, spent some time dialing that in.

Extrusion rate should be good also, spent some time dialing this in also following the reprap calibration guide.

Also looked at this:
[reprap.org]

but didn't see it on there, or if it was I missed it.

This is a new issue for me. What could be causing this?

Two thoughts come to mind:
1) The nozzle temperature is too high? I have printed some brands of ABS at 220C.
2) The filament is "wet", and needs to be dried? ABS is notorious at absorbing moisture during storage.

Looks like over extrusion and maybe bed too hot, to me.

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Ultra MegaMax Dominator 3D printer: [drmrehorst.blogspot.com]