Abstract: The traditional method to calculate radius compensation is complicated,with a relatively large amount of calculation. This paper put forward a new method of vector compensation for the tool radius. I3y analysising the tangent vectors intersection angle of processing line at transition point in plane coordinate system, so that to judge different connecting types and by calculating the compensation of the tool radius,we can get the coordinate of every transfer point.Simulation Result shows that this method is simple and practical. And the calculation is significantly reduced compared with the traditional method, especially for the calculating of transfer point, introducing of vector method makes it possesses huge advavtage compared to triangle function method.

Key words: Tool radius compenastion, Vector method, Simulation