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Setting method of positive and negative stepping motor of driving source of rotary index table

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Update time : 2019-04-20 21:15:55
In the drive source of the rotary index table, there are many cases where a stepping motor is used. How does the stepper motor realize its forward and  revoke rotation? To understand this problem, we must know the rotation angle, rotation speed and direction of rotation of the stepper motor, and the number, frequency, and power-on sequence of the input pulses related to it.
  The setting of the forward rotation of the stepping motor can also be simply understood as the setting of the direction signal of the stepping motor. The direction level signal DIR is used to control the rotation direction of the stepping motor. When the end point is high level, the motor turns; When the endpoint is low, the motor turns to another. Motor commutation must be set after the motor has stopped, and it is important to know that the commutation signal must be sent after the end of the next CP pulse in the previous direction and before the first CP pulse in the next direction. When the control  (host computer) sends a double pulse (ie positive and negative pulse) or the amplitude of the pulse signal does not match, we need to use our signal module to convert to a 5v single pulse (pulse: medium plus direction).
1. When the input is a single pulse, the code module's DIP switch should be pulled to the single pulse "position. When there is pulse output, the motor rotates. Changing the direction signal high and low level can change the motor rotation direction. The specific timing can be referred to. Module specification.
2. When the input is double pulse, the DIP switch of the signal module should be set to ̇ double pulse: middle position. When the positive pulse is turned; in the middle, the motor rotates forward; when the negative pulse is issued, the motor revokes. Positive and negative pulses cannot be given to the signal at the same time. The specific timing can refer to the signal module specification.
The running direction of the stepping motor is opposite to the requirements, and how should it be adjusted? There are two ways to achieve this: one method is to change the direction signal of the control system. The other method is to change the direction by adjusting the wiring of the stepping motor. The specific method is as follows: For a two-phase motor, it is only necessary to exchange the motor line of one of the phases into the stepper motor driver, such as A+ and A-exchange: for the three-phase motor, the motor line of one of the phases cannot be exchanged. Instead, the two phases should be exchanged sequentially, such as swapping A+ and B+, or swapping A- and B-.