The analysis of the causes of stepper motor positioning are not allowed to be
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The analysis of the causes of stepper motor positioning are not allowed to be

Views: 0     Author: Site Editor     Publish Time: 2020-12-09      Origin: Site

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Because of the open loop control system has convenient operation, the advantages of low price, so our country is basically used by reactive stepper motor open-loop control is given priority to. Although widely used stepping motor, but its not like ordinary alternating (Straight)Flow motor under the condition of normal use, and the running speed of from start to finish must meet certain requirements, so often appear some fault location are not allowed to be. A theory of condition. In the motor start frequency is greater than the speed limit, the motor can be run by the requirement, and can achieve the desired speed. At the end of the run to travel, can immediately stop function can be accomplished by pulse, and makes the motor to stop running. But the reality is, step motor to realize the limits of the starting rate is low, far cannot satisfy the requirement of high speed. Under this kind of work conditions, to make the speed of the motor to request (Start advance rate) is greater than the limitStep will happen starting directly, 'lost' or no response. And when the motor running to the end, although have to immediately stop sending pulse. Make it stop, but due to inertia effect, the phenomenon of crossed the finish line, will happen on generating overshoot. In particular, for the sake of both the positioning precision to ensure the system (Motor speed slow. To prevent to produce 'step' or 'overshoot')To obtain high positioning speed again, the mainstream system will locate process divided into stages of coarse positioning and fine positioning. Production practice experience tells us that 'throw step, and the overshoot is most commonly occurs in the operation of the stepping motor in two seriously affect the stepper motor positioning precision of the' culprit '. Positioning are not allowed to be the main reason for including: (1)Starting velocity through demanding, exceeding the limit start frequency motor or acceleration is too large, resulting in 'step lost; (2)Motor power could not reach the requirements of the system; (3)The working process of the actuator by thousands of interference; (4)Controller of the control system to produce false action; (5)Reversing the pulse, a one-way operation accurate positioning and orientation deviation after reversing, and although the reversing frequency deviation springs to increase its product, the more obvious; (6)Software design defects; (7)Use the occasion of synchronous belt. Software compensation too much or too little.
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