Patent ID: 7493966

Claim:
A system for making a hole in an object, the system comprising jet means for generating an abrasive jet comprising a mixture containing a fluid and a quantity of abrasive particles and for blasting the abrasive jet with an erosive power into impingement with the object in an impingement area, thereby eroding the object in the impingement area, the system further comprising scanning means for moving the impingement area along a selected trajectory in the hole, and modulation means for modulating the erosive power of the abrasive jet while the impingement area is being moved along the selected trajectory, wherein the modulation means is arranged to modulate the quantity of abrasive particles in the mixture and wherein the modulation means comprises modulation control means arranged to control the modulation means such that the erosive power of the abrasive jet is modulated in relation with the position of the impingement area on the selected trajectory.