I have been having an issue recently.
My nozzle is unable to get close enough to the bed...Neither Simplify or Matter Control are getting it low enough.
I have tried setting the z offset in the gcode control pane of the process as far as -1mm but nothing...
Thought I'd ask here in case someone has an idea how I can fix this, without doing any kind of surgery on the printer itself.
Here are 2 pictures... the one with the square skirt is a Matter Control print..the 2nd is Simplify3d.