Correct way to enter Z axis offset

When I print items with holes on the z axis they come out ever so slightly squashed... Maybe only the amount of a few layers.

If my nozzle is set to 0.127mm above the bed should that number be in the z axis offset since Z 0 is actually 0.127mm below what it thinks is 0? Should that number be negative or positive?

If you enter a positive let's say 10, then when it homes that spot will be 10. So in your case telling it.127 would let it know it's actual height.

Though I solve this particular problem with a start getting code that tells it to go to.2 for my first layer
G1 Z.2 300

Edited 1 time(s). Last edit at 03/17/2016 09:23AM by DaGameFace.

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Printer: Prusa i3, 2 E3D v6 Hotends, Arduino + RAMPS 1.4 with a Bypassed 5V Regulator, 400w Insignia ATX PSU, Custom Designed Bowden Extruders