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?
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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
// 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 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