Coffee grinding machine with burr alignment system and associated method

A method for orienting relative to each other the burrs (2, 3) in a flat-burr coffee grinding machine, the method comprising:

• providing a coffee grinding machine (10) comprising:
• a first rotatable burr (2);
• a second burr (3) which is configured to cooperate with the first burr (2) for grinding coffee beans, wherein the second burr (3) comprises a second surface (3a);
• a grinder-holder body (4) which can be releasable associated with the second burr (3), wherein the grinder-holder body (4) comprises a first surface (4a) at least partially facing the second surface (3a) and cooperating therewith,
• wherein either one of the first surface and the second surface (3a) is a spherical surface and wherein the other one of the first surface (4a) and the second surface (3a) is a spherical surface, or comprises a conical surface, or comprises a serrated surface, or comprises a deformable element,
• orienting the second burr (3) with respect to the first burr (2) and
• locking the second burr (3) to the grinder-holder body (4), wherein the orienting step comprises moving the second burr (3) and the grinder-holder body (4) relative to each other along the first surface and the second surface and the step for releasably associating them is performed after the orienting step.