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2020-05-22 5:02 pm
Greetings. I am puzzled with the current requirement of stepper motor. The model I have is 42SHD0217-24B (2 phase bipolar). It says current = 1.5 A. What does this really mean?
I followed Bills video, used A4988 with Arduino. Motor spin as expected. Current was at 1.5+ A. I experimented further with micro stepping. Motor did not spin properly & stopped spinning in some micro stepping settings. Then started experimenting by adjusting the current (connected multi-meter in series) and set the limiting current of A4988 to 0.3+ A. The stepper motor spin as expected in all the micro-settings (half, quarter, eight and sixteenth) & for full step as well. Please can someone explain to me why 0.3+ A worked and not 1.5 A?
Thank you.
2020-05-22 5:13 pm
Greetings. I am puzzled with the current requirement of stepper motor. The model I have is 42SHD0217-24B (2 phase bipolar). It says current = 1.5 A. What does this really mean?
I followed Bills video, used A4988 with Arduino. Motor spin as expected. Current was at 1.5+ A. I experimented further with micro stepping. Motor did not spin properly & stopped spinning in some micro stepping settings. Then started experimenting by adjusting the current (connected multi-meter in series) and set the limiting current of A4988 to 0.3+ A. The stepper motor spin as expected in all the micro-settings (half, quarter, eight and sixteenth) & for full step as well. Please can someone explain to me why 0.3+ A worked and not 1.5 A?
Thank you.
Hi Ganesan,
Here is a great page I found and remembered 🙂 http://blog.inventables.com/p/stepper-motors.html It gives some details on the motors, their ratings, and driving them.
I will also warn you some of the A4988 drivers (we all buy them :0-) are not created equally. For personal projects, I tend to not use them and get other drivers but understand that they are so cheap!
Scott