用两个步进电机，中间的绳索拉动重物，可以通过51控制其运行轨迹，譬如：圆，直线，矩形，并能实时显示重物坐标。-With two stepper motors, the middle Shengsuo La moving heavy objects, you can run 51 to control its trajectory, such as: round, linear, rectangular, and can coordinate real-time display weights.

关于通讯的一个小程序，希望和大家交流心得，有不妥之处希望大家指正，谢谢。-PL/M-86 COMPILER PAS_MOD 11/02/ 2 11:11:51 PAGE 1 DOS 5.0 (038-N) PL/M-86 V2.7 COMPILATION OF MODULE PAS_MOD OBJECT MODULE PLACED I