Hi Johan,

The grooving tool is specific to the thickness of aluminium composite, you will see a number marked on the side of the grooving tool holder this should match the thickness of the board (i.e.  If it is marked with a ‘3’ it is for 3mm thick board).

The adjustment you have made sets the tool in the correct position in relation to the surface of the board and the tool holder is preset for the depth of cut.  We have manufactured them in this way because the blade depth is very important and needs to be set to within a small fraction of a millimetre to work properly.  So the extra expense for having two tools if you use two thicknesses of board is outweighed by the time and material wasted to try and get the blade set to its optimum depth each time you change from one thickness to another.

I hope that is all helpful, please let us know if you have any further questions.