What do you mean step by step motor
Half step. In the single phase excitation, step motor shaft stop to the whole position, drive after receiving the next pulse, such as to another phase excitation and keep the original one after another in excitation state, the motor shaft will move from a half step Angle, stop in the middle of the adjacent two whole step position. The two phase coils of the two phase coils are rotated in such a circular manner and the two phase excitation stepper motors will rotate in half a step of each pulse. All the whole/half step actuators supplied by the yamashan electric motor can perform the whole step and half step drive, which is chosen by the dialing position of the drive dial switch. Compared to the whole step mode, half step way are twice as high accuracy and the advantages of small vibration during low speed running, so the actual when using the full/half step drive half step is generally selected mode.
Step in three-phase motor, for example: the whole operation is A - B - C. The three input pulse, pulse interval Angle of angular displacement = *. Half step run as follows: A - AB - B - BC - C - CA. The input pulses, six angular displacement is equal to the input of three step pulse of the whole operation value. Step in the whole running condition, each pulse input, step motor shaft angular displacement is A moment of Angle, under the half step operation, for each pulse input, the motor shaft angular displacement is half step torque Angle.
Step Angle: corresponding to a pulse signal, the angular displacement of the rotor of the motor is expressed in theta. Theta = 360 degree (the number of rotors), in the case of the normal two and four phases, the rotor teeth are 50 teeth motor. Four run time interval Angle is theta = 360 degrees/(50 * 4) = 1.8 degrees (commonly known as a whole step), eight beats runtime interval Angle is theta = 360 degrees/(50 * 8) = 0.9 degrees (commonly known as half step).
The step motor drive has three basic step motor drive modes: whole, half step, subdivision. The main difference lies in the control precision of the motor coil current (that is, the excitation method). Step 1. In the whole operation, the same stepper motor can be matched with the whole/half step drive, but the operating effect is different. Stepper motor drives the pulse direction/instruction on the two two phase stepper motor excitation coil cycle (the coil set charging current), the driving mode of each pulse will make the motor moving from a basic step Angle, namely 1.80 degrees (standard two-phase motor a total of 200 steps from the Angle of a circle).
The subdivision drive mode has two advantages of low speed vibration and high accuracy. For sometimes need to run at low speed (that is, the motor shaft and sometimes work in the RPM of 60) or positioning accuracy is less than 0.90 degrees of stepping applications, the subdivision type stepping motor drives for a wide range of applications. Its basic principle is to two of the motor coil respectively according to the steps of the sine and cosine shape precision current control, thus making a step away from the Angle of step distance is divided into several segments. Such as drive mode can make the segmentation of 16 step each lap 200 standard stepper motor to achieve each lap 16 = 200 * 3200 steps of running accuracy (0.1125 °). Overall: step in the whole running condition, each pulse input, the motor shaft angular displacement is a step torque Angle, in the condition of half step operation, for each pulse input, the motor shaft angular displacement is half step torque Angle. It is best not to use the whole step when stepping into the motor
