I really hope someone can help me figure this out cause I don't know what's happening and I can't seem to find any solutions.  

Anytime I engrave I'm getting this happening, it focuses on the middle of the area and fades off on all the directions.   

I recently installed the risers and honeycomb base.  But this was happening with just the baseplate also.  

Can someone please help me understand what's happening and help me with dummy proof instructions on how to fix this please?