The phase error between output and input voltage is received by CAP interrupt and Period interrupt of MCU, a alterable PI controller is applied to calculate a compensation value of carried period which is changed by grouped Linear interpolation re-modulation technique, high precision digital phase locked functio.

Meanings of linear interpolation and velocity;

This article analyzed the theoretical errors resulted from approximating the perfect continuous tool path with linear interpolation in 5-axis machining,and this kind of error is also called non-linear motion errors or known as the geometry-based errors.

To overcome this problem and optimize machining speed,based on the data sampling method,the 5-axis simultaneous linear interpolation was realized by using the equivalent displacement and the directional coefficient of the coordinate axis.

The relationship between the linear interpolation step length and the nonlinear interpolation error is studied on a Stewart platform-based parallel kinematics machine(PKM) for enhancing the kinematics accuracy.

Algorithm for linear interpolation of four coordinates with point-by-point comparison method;

Linear interpolation control and its realization based on PLC;

Design and Realization of Linear Interpolation Controller Based on CPLD