A common method of zeroing a CNC machines Z axis using Mach3 is done by using the paper friction test. While this works OK in a pinch, it is very inefficient and not really accurate.
A better way to zero our tool changes would be the use of a touch plate (conductive plate) to automatically feel our tolerances and zero our machine for us.
This video describes how to setup and use a homemade touch plate system together with Mach3 (Newfangled Solutions) by using simple materials and best of all, there is no cost associated with making it.
Link to VB Script: https://drive.google.com/file/d/0B2hPzRSbcroXSU9veTVwUjhfbjQ/edit?usp=sharing&utm_source=YouTube%20Video&utm_medium=Link%20In%20Description&utm_campaign=Zero%20Plate%20Mach%203%20Video
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