i'm using some stepper motors, 12volt power supply and the EasyDriver board assembled ( http://schmalzhaus.com/EasyDriver/
with version 4.4 of the board, everything is ok.
but (with the same arduino code, and i try out different arduino board and different motors, even different wires and breadboards) with 4.3 board..
after 30 seconds the motors begin to click and to have a not-fluid movement.
i think is due to some kind of overheating problem.
i tried this:
make the motor run for 5 seconds, use sleep pin in the easydriver board for let it cooling down for 6 seconds, run again.
in this way.. the motor is always fluid and regular.
i've also seen that if i let the motor run (clicking) for more than 1 minute it give problems to serial: if i open the serial monitor window or i try to upload some sketches on the arduino board and it give me SerialNotFound exception.
i think that schematics are right: i share the same ground on the breadboard, i use a vin power and 12 volt power supply and computer and power supply are in the same power strip.
anyway, with the latest easydriver board (the one with a plastic mini-potentiometer and not with a little iron screw for adjust the power of the motor) everything is ok.
has anyone experienced something similar?
what can it be?
what can i do?