I need some help or guidance on how to program a slot which starts at -0.10" depth and over a 4" movement it ends at 0.00". So a gradual movement from -0.10 to 0.00" smoothly over 4".

Slot width would be 3/8" wide using a .1875" bit with cutting speed of 1.5" per minute.

I readily use some CNC engraving software with Mach3 but not sure how to create a program for this type of Z movement.

I am also open to paying a nominal fee for someone to create this program and can explain more in detail / email a drawing.