Axis Minima and Offsets

Trying to setup my Axis Min and Max, problem i have is that when it homes to X & Y in reality X is 30 and Y is 85 from true bed 0,0 how do i set Duet 2 Wifi (Reprap Firmware 3 Not beta) so that when it homes it will go to the true 0,0 and start from there. and also so the BL touch will probe the true area of the bed


Yes M208 I was looking at it before
So if i Set my M208 X40 Y85
When it homes it will be a X40 Y85
I make it move to X0 Y0I then set M557 to Define Mesh
M557 X10:300 Y10:300 S20Since the BLtouch Offset is Y45 will it compensate for the 45 when probing or do i need to compensate another way for that offset?

@Adamfilip It will take the probe offset into account when probing.
So in your case, it will try to position the probe at exactly (10,10) for the first probe position.
Since the probe offset is negative, that means your nozzle will be at (10,55) so the probe lines up with the defined grid.