Nema 14, Easy Driver and noise

Discussion in 'The Projects Forum' started by Hiltjere, Feb 21, 2015.

  1. Hiltjere

    Thread Starter New Member

    Feb 14, 2014
    I have a almost finished 3D printer with 6 extruders that I have today been trying to get running. The problem is I cant make the E motors work properly. I am using 6 Easy Driver 4.4 to run them - each motor has its' own driver. All the motors run erratically no matter what I do to fix the issue. I have been pulling off everything else than the power source, 1 motor and 1 driver, and still the motor(s) just resonate randomly instead of working onto my test signal from Arduino Uno. When I put a cheap socket type transformer to run the parts I get what I want. The transformer I run into problems with is like this:

    I have bunch of other stuff to run with the same power supply and the problems are equal no matter what I have connected to it. Even with just the Arduino and one Easy Driver (+motor) the problems occur. When the Step and Dir pins are unconnected and the Easy Driver is on, the resonances start right when I try to connect even a short (15cm) wire into the Step pin, with nothing on the other end!

    Can all this be due to not having any ferrit chokers on the cables? Damn the weekend....
  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
    Did you tie the negative of the 12V power supply (transformer) to the ground of the arduino?