Good morning
I am trying to figure out which driver would be the appropriate motor driver for a Stepper Motor with 18cm Lead Screw: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase https://www.pololu.com/product/2689 and due to its low voltage I am inclined to adquire a DRV8834 Low-Voltage Stepper Motor Driver Carrier https://www.pololu.com/product/2133 but due to the high current rate I’m not sure if that driver would work fine or not because it might stop working due to a overcurrent. It says the driver supports only 1.5 A RMS. If that is the case, would this driver work better?
https://www.pololu.com/product/2133
I am having issues with this buy. Also with the same type of driver board I am planning on moving a Stepper Motor: Bipolar, 200 Steps/Rev, 20×30mm, 3.9V, 0.6 A/Phase and a Sanyo Pancake Stepper Motor: Bipolar, 200 Steps/Rev, 50×11mm, 4.5V, 1 A/Phase
So I would like to buy just one type so that would make things easier.
thank you so much in advance
Hello.
When using current limiting stepper motor drivers like the ones we carry, you can run a stepper motor beyond its voltage rating. The higher operating voltage allows faster stepping rates. You can see more about this in the first FAQ on each stepper motor product page. We generally recommend choosing a stepper motor driver that has a current per phase rating equal to or greater than the current per phase rating of the stepper motor.
Our AMIS-30543 Stepper Motor Driver Carrier would be a good match for the current rating of the #2689 stepper motor. However, please note that the AMIS-30543 has a more complicated interface than our other stepper motor drivers.
You could use the DRV8834 if you need the input voltage to be lower than around 9V, but if speed is a concern, you should consider the DRV8825 carrier. Please note that neither the DRV8834 or the DRV8825 can continuously supply the full current the #2689 stepper motor needs to deliver its full rated torque. Since the holding torque of a stepper motor has a roughly linear relationship to the current, if you use a DRV8834 or DRV8825 (which can only source about 1.5A per phase under normal operating conditions) to drive the #2689 stepper motor (which draws 1.7A per phase), the most torque you will be able to get is about 88% of the rated holding torque of that stepper motor.
-Derrill
