Changing My Z axis Steps From belt to lead screw

Added a lead screw system for my Z axis. But not the steps are not right. When cutting depths they are way off. How do I change or calculate the new steps?

Please help.

There’s some discussion of this sort of thing at: http://www.shapeoko.com/wiki/index.php/Grbl_Configuration

Alternately, you could Use the technique documented at: http://docs.carbide3d.com/article/42-how-to-calibrate-the-machine-for-belt-stretch

You did all that awesome upgrade business, and post no pictures? You taunt us!

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