gc9n:
Ok i manage to make it move... it was the poti from the a4988 that i turn clock wise
i then work with full step , i just ground the ms1 ms2 and ms3BUT the motor power is not what i expect. i need more torque
I guess the first question is "Is the torque as much as the motor specifications say it should be?"
If not, you are going to have to tell us what current setting you have the A4988 set at.
What happens if you change the value of the millisBetweenSteps to make the motor go more slowly?
...R