7

I have a new BLTouch that is setup (using Marlin 1.8.7) but I want to increase the probing grid from a 3x3 to something like a 5x5. I am using bilinear leveling with a 3x3 grid.

How would I go about changing that?

7

I have a new BLTouch that is setup (using Marlin 1.8.7) but I want to increase the probing grid from a 3x3 to something like a 5x5. I am using bilinear leveling with a 3x3 grid.

How would I go about changing that?

8

You need to change the constant value(s) in your Configuration.h file of your Marlin version from:

// Set the number of grid points per dimension. #define GRID_MAX_POINTS_X 3 #define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X

to:

// Set the number of grid points per dimension. #define GRID_MAX_POINTS_X 5 #define GRID_MAX_POINTS_Y GRID_MAX_POINTS_X

This shows that to go from a 3x3 grid to a 5x5 grid you only need to change one value. Do note that you can set `GRID_MAX_POINTS_Y`

to any value other than `GRID_MAX_POINTS_X`

; replacing `GRID_MAX_POINTS_X`

in the line with `GRID_MAX_POINTS_Y`

to 4 would yield a 5x4 probe grid:

// Set the number of grid points per dimension. #define GRID_MAX_POINTS_X 5 #define GRID_MAX_POINTS_Y 4