How to determine the accuracy of stepping motor by the precision of linear movement?
Although the stepper motor has been widely used, but stepper motors can not be like ordinary DC motors, AC motors in the regular use. It must be composed of double ring pulse signal, power drive circuit and so on, and the control system can be used. Therefore, it is not easy to make good use of stepping motor. It involves many specialized knowledge, such as mechanical, electrical, electronic and computer. Stepping motor, as an actuator, is one of the key products of mechatronics. It is widely used in various automatic control systems. With the development of micro electronics and computer technology, the requirement of stepping motor is increasing day by day, and it is applied in every national economic field.
The stepping motor is an open loop control element which transforms the electric pulse signal into angular displacement or linear displacement. In the case of non overloaded, the motor speed and stop position depends only on the pulse frequency and pulse number, regardless of load changes, when the stepper driver receives a pulse signal, it drives stepper motor to set the direction of rotation of a fixed angle, called "step", it is the rotation of the fixed point of the operation step by step. Number of pulses can be controlled by controlling the angular displacement, so as to achieve the purpose of accurate positioning; at the same time by controlling the pulse frequency to control the motor rotation speed and acceleration, so as to achieve the purpose of speed.
The first to know the transmission mode, such as lead screw, need to know pH, then (according to l= (ph/2 PI) * l, linear displacement, angle theta) can be calculated by linear displacement of each unit needs a turning angle, and then according to this point of view to choose the step angle, if you need to select the appropriate subdivision is subdivision drive. If you need to turn 0.6 degrees, if it is 1.8 degrees stepper motor, you need 1.8/0.6=3 subdivision.
