In order to realize high-speed and high-precision synchronization requirements of gantry dual drives,a dual linear motor gantry dual drive servo feed experimental platform was built,and the synchronous error changes of the dual-drive synchronous feeding system of Beckhoff controllers under different feed speeds were compared and analyzed.The influences of acceleration and motion position on the synchronization error were analyzed.The synchronization error was regarded as a random signal,and the time-domain signal of the synchronization error was converted into a frequency-domain signal by means of fast Fourier transform,and the fre quency and amplitude of the synchronization error of gantry dual-drive system at different feed speeds were analyzed.Based on the experimental data of the velocity-position pair synchronization error,a mathematical model of the synchronization error and the velocity-position was established by sinusoidal fitting,and the effectiveness of the model for predicting the synchronization error was verified by test.