With the development of microelectronics and accounting skills, accumulate over a long period, the demand for step motor in control category will have widely used in a wide range of industries. PLC as a kind of industrial control accounting machine, with modular structure, flexible equipment, high-speed disposal speed, accurate data disposal ability, PLC also has excellent control to the stepper motor, using the high speed pulse output functions or motion control functions, can complete control of stepping motor. About those in the process of working speed of mobile interval and have concluded that the equipment in detail, Shanghai four macros stepper motor engineer thought to choose PLC after stepping motor driver to control step motor work skills is an ideal plan. The characteristics of the step motor: (1)Angular displacement of stepper motor is proportional to the input pulse number strictly, motor without cumulative error after a week's work, has the outstanding after sex. （2)Composed of stepping motor and drive circuit open loop digital control system, already very brief, sale, and very strong. Together, it can also react with viewpoints links constitute a high-performance digital closed-loop control system. （3)Stepper motor dynamic echo is fast, easy to rev. Stop, are turning and variable speed. （4)Speed can be recuperated in wide range of appropriate lubrication, low speed still can ensure to obtain the high torque. （5)Stepper motor can only work through the pulse power supply, it can not directly use the ac power and dc power supply. Stepper motor can echo step and do not break the highest step frequency known as the 'frequency'; Similarly, 'to suspend the frequency' refers to the system control signal and ran off, the stepper motor is not running through the highest step frequency of target bearing. And motor start frequency, stop frequency and output torque and the rotational inertia of the load. With these data, can effectively to stepping motor with variable speed control. Choose PLC controls stepping motor, should be based on the type of accounting system under the pulse equivalent, pulse frequency limit and the maximum number of pulses, and then select the function of PLC and its corresponding module. On the basis of pulse frequency can be concluded that PLC high-speed pulse output when the frequency of the demand, according to the pulse number can tell of the PLC. Pulse equivalent = (Stepper motor step Angle x pitch)/ (360 x transmission ratio)； Pulse frequency limit = (Movement speed by stepper motor fine fraction)/ pulse equivalent; Maximum pulse number = (Mobile interval by stepper motor fine fraction)/ pulse equivalent. PLC control of stepping motor must first establish a coordinate system, to set a relative coordinate system, can also be set to certain coordinate system. Coordinate system Settings in DM6629 word, 00 -03 corresponding pulse output 0, -7 a corresponding pulse output 1. When set to 0, for the relative coordinate system; Is set to 1, for certain coordinate system. Use PLC after stepping motor driver to control step motor work, thus reach the PLC in stepping motor control more and more widely used. For example, in the process of manipulation of single two-axis movement, on the control panel to set parameters such as mobile interval, speed and direction. PLC after read in these Settings, pulse and direction signals after operation, manipulation of the stepper motor drives, reaching the intention of interval, speed, direction control. And according to the measured system work results have strong sex, the feasibility and effectiveness. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
