Planner six-bar mechanism is widely used in the textile industry.A six-bar feed mechanism of sewing machine is studied.The mathematical model of kinematics and dynamics for this mechanism is established.On these bases

the simulation is implemented based on the platform of Matlab/ simulink.Thus

the motion rules and stress state of all parts in mechanism are obtained and described vividly according to two different working conditions.The simulation results show that stitch density of mechanism is affected by the parameter in different working conditions and changing this parameter can adjust the stitch density.Meanwhile

the results can provide a theoretical foundation for the further research of the mechanism.