Hello!
I am trying to control stepper motors for a 3d printer with a RAMPS 1.4 board connected to an Arduino Mega 2560. I have uploaded Marlin firmware to the board and am currently using Pronterface to test the board's components. At first, the stepper motors would not move at all when commanded. They would just slightly twitch and them hum, but not rotate. Then, I checked the wiring connections and ensured they were correct, but the problem persisted. Then, I measured the voltage supplied by the stepper drivers, which was 0.79 Volts. Based on my stepper motors, Nema 17, the maximum voltage I calculated was 1.36 Volts. After adjusting the potentiometer screw the maximum amount, the voltage supplied is 1.19 Volts. Now, the motors WILL rotate when given the 0.1 and 1 command in Pronterface, but return to the twitch and whine behavior when given the 10 or 100 command. Is my Marlin configuration the cause of this behavior?
