I can 100% confirm that when entering g0 then the axis and a number it moves to that location in work coordinates. So if you zero x and then enter g0x20 it moves 20mm in axis x and if you enter the same again it doesnt move at all. Is this abnormal?

I can 100% confirm that when entering g0 then the axis and a number it moves to that location in work coordinates. So if you zero x and then enter g0x20 it moves 20mm in axis x and if you enter the same again it doesnt move at all. Is this abnormal?

That is exactly as is should be when working in Absolute mode. The X axis is already at X20 so no movement is necessary.

On the other hand, if you were working in Incremental mode then the X axis would move another 20mm.

This is all explained, much better than I can, in the Mach 3 Manual. http://www.machsupport.com/help-learning/product-manuals/

Tweakie.

Thank you I should familiarize myself with the manual properly

Thank you I should familiarize myself with the manual properly

I don't think you can expect to learn it all (there are parts I still don't fully understand) but the combination of manual and hands-on experience seems to win out in the end. 

Tweakie.