Intelligent surface detection and core drilling start

A feed device for driving a core drill along a machine holding device for performing a control method comprising:

• moving the core drill in a first direction and positioning a drill bit of the core drill against a surface of the mineral material to be worked while the core drill is not rotating;
• detecting a position of the surface of a mineral material to be worked based on reaching a predetermined threshold value for at least one corresponding, predetermined parameter of the feed device in the form of a first reference value;
• after the moving the core drill in a first direction and detecting a position of the surface, moving the core drill in a second direction;
• and then operating the core drill in a predetermined tapping mode wherein the core drill is rotated with slow speed and high torque;
• and then moving the core drill in the first direction for a second time;
• after the core drill moves in the first direction for the second time, detecting the position of the surface of the mineral material to be worked based on reaching a drilling parameter predetermined threshold value for at least one corresponding, predetermined drilling parameter in the form of a second reference value;
• activating a water supply;
• and activating a regulating and control unit for adapting the at least one predetermined drilling parameter as a function of the at least one predetermined parameter of the feed device.

A core drill for performing a control method comprising:

• moving the core drill in a first direction and positioning a drill bit of the core drill against a surface of the mineral material to be worked while the core drill is not rotating;
• detecting a position of the surface of a mineral material to be worked based on reaching a predetermined threshold value for at least one corresponding, predetermined parameter of the feed device in the form of a first reference value;
• after the moving the core drill in a first direction and detecting a position of the surface, moving the core drill in a second direction;
• and then operating the core drill in a predetermined tapping mode wherein the core drill is rotated with slow speed and high torque;
• and then moving the core drill in the first direction for a second time;
• after the core drill moves in the first direction for the second time, detecting the position of the surface of the mineral material to be worked based on reaching a drilling parameter predetermined threshold value for at least one corresponding, predetermined drilling parameter in the form of a second reference value;
• activating a water supply;
• and activating a regulating and control unit for adapting the at least one predetermined drilling parameter as a function of the at least one predetermined parameter of the feed device.

A core drilling system comprising a core drill and a feed device for driving a core drill along a machine holding device for performing a control method comprising:

• moving the core drill in a first direction and positioning a drill bit of the core drill against a surface of the mineral material to be worked while the core drill is not rotating;
• detecting a position of the surface of a mineral material to be worked based on reaching a predetermined threshold value for at least one corresponding, predetermined parameter of the feed device in the form of a first reference value;
• after the moving the core drill in a first direction and detecting a position of the surface, moving the core drill in a second direction;
• and then operating the core drill in a predetermined tapping mode wherein the core drill is rotated with slow speed and high torque;
• and then moving the core drill in the first direction for a second time;
• after the core drill moves in the first direction for the second time, detecting the position of the surface of the mineral material to be worked based on reaching a drilling parameter predetermined threshold value for at least one corresponding, predetermined drilling parameter in the form of a second reference value;
• activating a water supply;
• and activating a regulating and control unit for adapting the at least one predetermined drilling parameter as a function of the at least one predetermined parameter of the feed device.