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Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit - v2.
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit - v2.

by BoredDuck on Fri Feb 15, 2019 5:47 pm

I just purchased this shield and soldered the appropriate pins to the card so it'll attach to the Arduino Uno. I attached the shield to the Uno and when I connect power in any matter through the USB or AC to DC plug on the Uno the LED on the shield starts blinking. I have nothing else connected to the card, no motors or servos. Does this mean the shield is bad? Any suggestions?

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by adafruit_support_bill on Fri Feb 15, 2019 5:49 pm

Please post some clear photos of the front and back of your shield.

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by BoredDuck on Fri Feb 15, 2019 6:02 pm

Here are the front and back pictures as requested
Attachments
Shield Front.jpg
Shield Front.jpg (122.54 KiB) Viewed 177 times
Shield Back.jpg
Shield Back.jpg (77.36 KiB) Viewed 177 times

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by adafruit_support_bill on Sat Feb 16, 2019 7:51 am

So when you power the Arduino & shield, the green power LED blinks on and off?
Is the Arduino still functional at that point? Are you able to upload code to it?

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by BoredDuck on Sat Feb 16, 2019 9:37 pm

Okay so a weird thing happened today when I plugged the board up to test is the Arduino would accept an upload. The power LED on the shield lite up and stated solid this time. So I went ahead and tried to upload the Example/Adafruit Motor Shield V2 Library/Stepper Test. The Arduino accepted the code but the stepper motor I had attached did nothing. I swear I did nothing different so I don't know why the LED is steady on and not blinking anymore.

I now have a new issue with the motor not responding at all now. I connect the wires to Motor #2 (black & green wires to the M3 and the red & blue to M4 as instructed in the StepperTest example. The motor I am using is a STEPPERONLINE Short Body Nema 17 Bipolar Step Motor 3.5V 1A 18.4oz.in/13Ncm DIY CNC.
Attachments
shield wires.jpg
shield wires.jpg (51.96 KiB) Viewed 157 times
shield top.jpg
shield top.jpg (55.79 KiB) Viewed 157 times
Last edited by BoredDuck on Sat Feb 16, 2019 10:42 pm, edited 1 time in total.

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by franklin97355 on Sat Feb 16, 2019 10:05 pm

That stepper is not right for the shield. For that motor, you should use a current limiting device like the DRV8833

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by BoredDuck on Sat Feb 16, 2019 10:13 pm

Oh thank you. Since I'm completely new at this can you try to explain why it's not compatible with the shield and how you know the DRV8833 is? So I can try to prevent this error from happening again.

If you don't mind me asking can you tell me what is the strongest stepper motor that can work with the Adafruit Stepper Shileld v2?

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by franklin97355 on Sat Feb 16, 2019 11:37 pm

The resistance per phase is too low for the shield and would pull too much current. Take a look at this article.

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by adafruit_support_bill on Sun Feb 17, 2019 7:50 am

If you don't mind me asking can you tell me what is the strongest stepper motor that can work with the Adafruit Stepper Shileld v2?

Motor torque is roughly proportional to the electrical power it consumes. Power (watts) is calculated as volts time amps.

The shield has a maximum supply voltage of just over 12v. And it has a maximum continuous current rating of 1.2A per phase. Since a typical stepper can have up to 2 phases energized at a time, the maximum power output for the shield is 12v * 1.2A * 2 phases or 28.8 watts.

In order to achieve that, you need to have a motor that will pull 1.2A per phase at 12v. Ohm's Law states that current = volts / resistance. Put another way, that is resistance = volts/current. Solving that with the shield limits we get: 12v / 1.2A = 10 ohms.

To get maximum power from the shield, look for a motor with a phase resistance of 10 ohms and power it with a 12v power supply.

Avoid motors with less than 10 ohms phase resistance. You will need to lower the supply voltage to safely use these motors.

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by BoredDuck on Sun Feb 17, 2019 10:19 am

Thank you for the break down and to know what to look for. If I have a correct understanding now I believe this Stepper Motor should work with the shield.

* Phase Resistance: 30ohms
* Voltage: 12 volts
* Rated Current/phase: 0.4A
* Holding Torque: 26Ncm(36.8oz.in)
* Wattage: 4.8 watts

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by adafruit_support_bill on Sun Feb 17, 2019 1:14 pm

Yes. That should be compatible with the shield.

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by BoredDuck on Wed Feb 20, 2019 8:52 am

The new stepper motor we delivered last night. I hooked everything up and NOTHING. The motor didn't move at all. I verified that the Stepper Test did get uploaded to the Arduino and the LED on the shield was steady and bright. I also supplied a separate 12VDC for the motor shield. I don't have the parts with me right now but I did remember while driving to work that I forget to remove the jumper on the shield. With the jumper in would that stop the 12VDC power supply from powering up the motor?

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by adafruit_support_bill on Wed Feb 20, 2019 9:21 am

The jumper should not prevent the motor from running.

What is displayed on the Serial Monitor when you run the stepper test?

If you post a photo showing your motor wiring we can check for problems there.

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by BoredDuck on Wed Feb 20, 2019 11:15 am

I'm sorry but I don't know what you mean by "Serial Monitor". If your talking about the sketch when I upload it to the Arduino it says it complied and uploaded just fine. Since I don't have the parts on hand I can't take a picture but I do know the wires for the motor. Black & Green for coil 1 and I hooked up to M3. Red & Blue for coil 2 which I hooked up to M4.

Update
I just researched what a Serial Monitor is and I will open up that window up on the software tonight while I am attempting to run the motor. I will post my result when done.

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Re: Adafruit Motor/Stepper/Servo Shield for Arduino v2 Kit -

by BoredDuck on Wed Feb 20, 2019 6:56 pm

Okay I was able to open up the Serial Monitor and it would cycle through the following steps:

Single coil steps
Double coil steps
Interleave coil steps
Microstep steps

The motor still showed no movement.

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Please be positive and constructive with your questions and comments.