Lowering the plate by a tiny amount could help a bit, but as Ryan already pointed out, it is showing signs of extruding too much material while laying down the solid base layers - the exces material has nowhere to go but out!
Ok, search the forum for extrusion volume calibration, and follow the instructions. You're probably just over-extruding.
--
You received this message because you are subscribed to the Google Groups "MakerBot Operators" group.
To unsubscribe from this group and stop receiving emails from it, send an email to makerbot+u...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.