Arduino Forum

Topics => Robotics => Topic started by: altronic on Dec 06, 2017, 07:16 am

Title: Nema does not work correctly.
Post by: altronic on Dec 06, 2017, 07:16 am
My power source is a 16v 2.5 A, set up with a variable voyage regulator. And an Arduino Uno and a motor shield with 3 shift registers (74HC595N).
Using 12v on the Nema 17 I get very sporadic results in rotation of the motor. The sketches are from the Arduino ide library. Any help would be appreciated, Thank you.
Title: Re: Nema does not work correctly.
Post by: altronic on Dec 06, 2017, 07:51 am
I read the data sheet for ic, and it looks like they are rated for 3v to 6v. But I have a 5v stepper motor and get the same results, sporadic rotations if any at all.
Title: Re: Nema does not work correctly.
Post by: Southpark on Dec 06, 2017, 10:10 am
But I have a 5v stepper motor and get the same results, sporadic rotations if any at all.
Check how much current your 12 volt regulator is able to deliver ...eg. maximum current from the manufacturer specs.

Try using a stepper driver like DRV8825.
Title: Re: Nema does not work correctly.
Post by: altronic on Dec 08, 2017, 02:28 am
South Park I think you are right about trying DRV8825. But wouldn't have though my 12v regulator would decrease the amps. I'll call it a wall wart rated at 16v/2.5 A and I run the through the 12v regulator, I guess the amps would be reduced, but by a very little amount. But I'll have to check out the data sheet for the regulator. Thanks for your answer. I'm sure you are right.