Method of determining current position data of a machining tool and apparatus therefor
AssigneeSirona Dental Systems GmbH
InventorBernd Rothenberger
Life of this patent
Estimating the term…
Abstract
Current position data is determined of a first machining tool in a machining space having a second machining tool, the second tool having known position data with regard to the position data of the first tool which are to be determined, the first tool and the second tool being movable toward and away from one another, the first tool to be determined in its position comes into contact with a machining surface, known in its position, of the second machining tool, the rotary speed of a drive motor for the second tool being set to a starting rotary speed which is so low that the rotary speed of the second tool is measurably reduced when the tool comes into contact.
Claims14
A method of determining current position data of a first machining tool in a machining space having a second machining tool, the second tool having known position data with regard to position data of the first tool which are to be determined, arranging the first tool and the second tool for movement toward and away from one another, contacting the first tool to be determined in its position with a machining surface, known in its position, of the second machining tool, setting the rotary speed of a drive motor for the second tool to a starting rotary speed which is so low that the rotary speed of the second tool is measurably reduced when the tool comes into contact.
An apparatus for determining current position data of a machining tool, comprising a first and a second spindle for respectively each accommodating at least one machining tool which can be set in rotation and which respectively have a machining surface narrowing toward a tip and an end machining surface, the spindles being arranged and mounted in such a way that the machining tools can be relatively moved toward and away from one another and from a workpiece for the purpose of material removal at the workpiece, drive motors for adjusting the spindles and for the drive of the machining tools, and means for producing a signal which establishes a feed path of the tool and which is used for determining the starting position of the narrowing tip machining tool, wherein a contact area is formed by the end machining surface, and wherein the machining tools are oriented with axes thereof parallel and with an offset (r).
Dependencies are inferred from the claim text.