HOW TO CHECK Stepper NEMA 17 - DRIVER A4988 ARE WORKING/NOT BURNED

Hi I have been working with both the Stepper NEMA 17 - DRIVER A4988 to move some gears and stuff, first everything work perfectly just by connecting everything with my Arduino UNO as I power both my Arduino and my Stepper with two 9V batteries, lately my project stopped working and I'm trying to figure out was wrong so...

I want to know how to check if either my driver or my stepper are burned as I never regulated the driver to the right amperage, but it still worked for like two weeks.

Please help, my project must be completed tomorrow!

You can easily check the windings in the motor by measuring the resistance with your multimeter.

The most effective way to test the driver is to try a known good driver.

The drivers have a lot of in-built protection - especially for overloads. The one thing that is almost guaranteed to break a driver is disconnecting (even briefly) a wire between the driver and the motor while the driver is powered.

...R

For example I connect a LED a pair of wires of the stepper, and i turned the stepper shaft the LED turns on (with both of pairs), does that means the stepper works?

For the driver I regulary connect and disconnect the power from it with the arduino still on, as I plug the battery driver with my fingers or tape (noob here, i know), but the wires between driver and motor are soldered, as all the other connections in the driver. So I have turn on and off the driver multiple times with the arduino still on, and the other way around (don't know the correct way to turn it on and off)

NEMA 17 tells us nothing useful, just the size of the motor mounting plate. Post a link to the motor or its data sheet.

You MUST set the current appropriately on the motor driver. Pololu explains how.

You should power up or down all connected electronics at the same time.

Data Sheet of my STepper Motor

As I already got new drivers, i really just want to know if my stepper drivers stills works, any way to quickly check if it's not broken??

Connect the driver to an appropriate motor and a suitable power supply, adjust the current limit properly (to 1.0 A or less) and test operation with a known working program.

The motor you have will work with the A4988 driver, as long as the current limit is set to 1 A or less.

as I power both my Arduino and my Stepper with two 9V batteries,

As a kid growing up in the 50's it was kind of fun to test the 9V battery used in the new portable electronics with

my tongue to test it.

as I power both my Arduino and my Stepper with two 9V batteries,

OOPS, I didn't notice that. No wonder nothing works.

And, horror of all imaginable horrors, the project is due tomorrow!

colmo007:
For example I connect a LED a pair of wires of the stepper, and i turned the stepper shaft the LED turns on (with both of pairs), does that means the stepper works?

That does not sound like what I suggested.

For the driver I regulary connect and disconnect the power from it with the arduino still on, as I plug the battery driver with my fingers or tape (noob here, i know), but the wires between driver and motor are soldered, as all the other connections in the driver. So I have turn on and off the driver multiple times with the arduino still on, and the other way around (don't know the correct way to turn it on and off)

It is the wires between the motor and the driver that matter - and from what you say they have good connections.

...R

Small 9V batteries cannot deliver enough current for a stepper motor - get a suitable supply that can
provide enough current.

colmo007:
As I already got new drivers, i really just want to know if my stepper drivers stills works, any way to quickly check if it's not broken??

Yes there is. If you have a spare stepper motor of the same kind, and if you drive it with your existing driver .... and if it works, then you can assume that your original motor might have a problem.

Alternatively, have new drivers and a spare stepper (of the same kind)...... and if the new driver works with the new stepper, and if you then put in your old motor ----- you will then find out if it still works properly.

I agree that the steppers should be powered by something substantial. Two 9V batteries is not recommended.

nema 17 stepper motor
a4988 driver
12V,1.5A adaptor

I use this components but no works. someone did please contact to me by mail also

e-mail: mfatihkoc1995@gmail.com

mfatihkoc:
I use this components but no works. someone did please contact to me by mail also

I am certainly not going to email you and I doubt if anyone else will either.

You should NOT post your email in a public Forum where it can he harvested by scammers. I suggest you edit your Post and remove your email address.

As you have not posted your program or your wiring diagram or details of your stepper motor power supply I have no idea why it won't work.

...R
Stepper Motor Basics
Simple Stepper Code