Smooth Continuous Motion w/ Stepper Motor Shield v2
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Please be positive and constructive with your questions and comments.
- fablabep
- Posts: 2
- Joined: Fri Dec 06, 2013 12:46 am
Smooth Continuous Motion w/ Stepper Motor Shield v2
I'm unable to get continuous motion using the Stepper Motor Shield. No matter what speed I run the motor at it is start/stop movement. How can I get smooth continuous movement? Same stepper running on either the grblShield or the EiBoard works fine and turns continuously.
- adafruit_support_bill
- Posts: 88088
- Joined: Sat Feb 07, 2009 10:11 am
Re: Smooth Continuous Motion w/ Stepper Motor Shield v2
What motor and power supply are you using?
- fablabep
- Posts: 2
- Joined: Fri Dec 06, 2013 12:46 am
Re: Smooth Continuous Motion w/ Stepper Motor Shield v2
Using this stepper from Evil Mad Scientist (http://shop.evilmadscientist.com/produc ... 87-stepper) and a 12V regulated switching power supply for the shield. Arduino is powered via USB.
- adafruit_support_bill
- Posts: 88088
- Joined: Sat Feb 07, 2009 10:11 am
Re: Smooth Continuous Motion w/ Stepper Motor Shield v2
The electrical specifications for this motor are:
From the specs of the motor, it appears best suited to a current limiting driver like the grblShield.
https://learn.adafruit.com/all-about-st ... he-stepper
If you are powering it at 12v, it will be trying to pull 4A per phase. This is 4 times the rating of the motor and more than 3 times the rating of the shield. You did not specify the current capacity of your power supply, but the jerky motion is likely due to an overload condition in either the shield or the power supply. You are lucky that nothing went up in smoke.Coil voltage 3.1 V
Current 1 A per phase
Winding resistance 3.1 ohms per phase
From the specs of the motor, it appears best suited to a current limiting driver like the grblShield.
https://learn.adafruit.com/all-about-st ... he-stepper
Please be positive and constructive with your questions and comments.