I want to buy a stepper motor that should rotate 45 degree in both the directions (CW & CCW) continuously for my research application. Can anyone suggest a suitable website or place?
Popular stepper motors have step angle about 1.8 deg. Fortunately, you want to move 25*1.8 . It means you have to increase index 25 time in each cycle. If you are working on small scales this IC might help you. The attachment is its datasheet. You need to send PWM signal and direction to it. Then it drives the stepper motor automatically.
I hope this webpage also would give you some insight.
http://www.ti.com/lit/ds/symlink/drv8811.pdf
Sorry the webpage is this:
http://www.omega.com/prodinfo/stepper_motors.html
Index has to be increased one by one. You can not jump. The solution is sending a 25 commands for going forward/backward and then it will turn 45 degrees. Note that usually stepper motors are used in the open-loop, and so the payload can affect performance of the motor (speed and accuracy). To avoid it you have to give a fairly wide margin for the torque of the motor. If you really need smooth and accurate motion, a servo motor (together with its driver) can give better performance in that sense because its rotation is controlled by a closed-loop controller.
- Badges
- Science topic
- Similar topics
- Mathematical Sciences
- Control Theory
- Control Systems