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US 5,723,961 AGranted
Numerical control apparatus having spline interpolating function
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsDaisuke Fujino, Tomonori Satou
Life of this patent
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Abstract
There is provided by the present invention a numerical control apparatus comprising a means for deciding a spline curve by repeating approximation of a tangential vector for an instructed point by required times according to the necessity, a means for controlling a speed by estimated a radius curvature of the decided spline curve, and a means for interpolating a speed on the decided spline curve.
Claims19
A numerical control apparatus having a spline interpolating function comprising:
- spline curve deciding means for deciding a spline curve smoothly connecting each of a plurality of pass points discretely set on a desired curved machining track by executing approximate calculations for a tangential vector of each pass point an arbitrary number of times;
- speed control means for computing a moving speed of an object so that, when the object moves according to the spline curve decided by said spline curve deciding means, the normal acceleration will be within an allowable range;
- and
- interpolating means for computing an amount of movement of the object on the spline curve per unit time for interpolation.
1 more element
A numerical control apparatus having a spline interpolating function comprising:
- spline curve deciding means for deciding a spline curve smoothly connecting each of a plurality of pass points discretely set on a desired curved machining track by executing approximate calculations for a tangential vector of each pass point an arbitrary number of times;
- speed control means for computing a moving speed of an object so that, when the object moves on a straight line according to the spline curve decided by said spline curve deciding means, a maximum clearance between the straight line and the spline curve will be within an allowable range;
- and
- interpolating means for computing an amount of movement of the object on the spline curve per unit time for interpolation.
1 more element
Dependencies are inferred from the claim text.