Hi,
I was wondering if anyone could help me - are there any stepper motor drivers that feature a reduced holding current capability or option?
I don't want to turn the motor off, but it doesn't need very much current at all to stay still as there is very little torque on it. I know this technique exists, but I don't know if there are any drivers that offer it - at least I can't find it specified. I can't limit the motors current because that still needs to be high when moving.
Thanks in advance!
Reducing stepper motor holding current
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- adafruit_support_bill
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Re: Reducing stepper motor holding current
What are the electrical specs for the motor? Most motor drivers do have the capability of modulating the output current with PWM. But you need to choose a driver that is compatible with the electrical characteristics of your motor.
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Re: Reducing stepper motor holding current
This is the motor: https://www.adafruit.com/product/324
I need the holding current to be reduced to conserve battery life. There is little torque on it when its holding position.
I need the holding current to be reduced to conserve battery life. There is little torque on it when its holding position.
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: Reducing stepper motor holding current
A controller like the DRV8833 would be a reasonable match. https://www.adafruit.com/product/3297
If you drive it using PWM capable pins on your microcontroller, you can use analogWrite() to output a reduced duty cycle PWM to the windings once the motor stops:
https://www.arduino.cc/reference/en/lan ... alogwrite/
If you drive it using PWM capable pins on your microcontroller, you can use analogWrite() to output a reduced duty cycle PWM to the windings once the motor stops:
https://www.arduino.cc/reference/en/lan ... alogwrite/
Please be positive and constructive with your questions and comments.