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I have an Arduino Mega clone and RAMPS 1.4 together with A4988 drivers and NEMA 17 motors which won't move. Motors can be turned easily by hand both when the RAMPS is powered and is not powered. There is ~12 V between VMOT and GND on the driver. I don't have multimeter capable of detecting pulses. I have all pins under the driver connected to enable 1/16 steps. I didn't touch the pot on driver.

What I have tried:

Can you please help me to find out what's wrong?

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  • $\begingroup$ Please note that the default pot meter position is undefined, it is not tuned or set for use, you need to adjust it. $\endgroup$
    – 0scar
    Mar 28 '20 at 12:55
  • $\begingroup$ Thanks! I have DSO138 oscilloscope on the way so I will update the question ASAP. $\endgroup$ Mar 29 '20 at 20:40

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