Uneven Surfaces

Have a look at how different the surface is in different areas on this print. Some parts are smooth with close spacing between nozzle passes, and in other areas there are gaps. It is most obvious to the left and right of the screw boss in the center of the photo but other parts show similar differences. The areas are precisely defined geometrically so I think it is a slicer issue rather than a nozzle, cable, etc. thing.

Z-ABS, 0.19mm layers, fast speed.

The infill used ?

"Medium" infill. 4 layers top and bottom I think.

Julia send me a .stl file if you can.

Thanks, Rafal, here it is:

http://www.pragmaticdesigns.com/Zortrax/base2.stl

Got it. Thanks.

I have had this happen also it seem to do it with big flat areas with holes in themĀ 

Same here..