齿轮关节，Android开发精典案例源码，很好的参考资料。-The gear joint, Android development of classical case of source code, a good reference.

齿轮公发线计算,简单的函数套用，实用计算工具。-Calculation of gear common hair line

倍福PLC连接4台松下Ethercat总线伺服，2轴电子齿轮同步，通过Ethernet/IP连接基恩士扫码枪。(The PLC is connected to 4 Panasonic Ethercat bus servomotor, the 2 axis electronic gear synchronously, and the Kean scan code gun is connected through Ethernet/IP.)

本人用石川法求齿轮的啮合刚度，完整版的程序，里面可以运行啮合刚度图(Meshing Stiffness of Gears Calculated by Ishikawa Method)