Built a CNC machine 1000mm x 800mm running MKS DLC and Gerber. (Hope this is enough info)

Using Candle I jog all axis just fine, except y-axis runs backwards but I'll reverse motor wires to correct.
The z-axis can be jogged in all increments, i.e. .1, 1, 5, etc. just fine.

I have Vcarve Pro and am trying to run a very simple program, that runs fine on my MySweety desktop machine but when I try to run with vcarve post processor settings set for large machine the z-axis drops way more each iteration than what it's supposed too.
The post processor settings I have are for gerber(mm).tap and I change extension to .nc and run in Candle.

I am very new to CNC.

Thanks for any help.