« first day (1 day earlier)      last day (18 days later) » 

tlfong01
tlfong01
9:02 AM
I am going to resume testing. I have wired up athe motor and found its resistances very low, only 3R, meaning 12V power would take 4A, and if accidentally disconnect when power on, might create huge back EMF and fry my A4966. So I would first test the meter to make sure, then A4966.
Your motor's resistance might be too high and take small current, so motor cannot move smoothly. Please confirm your motor resistance and perhaps also check current at 6V or 12V. Also if your logic power is stepped down from motor power, then when motor coils switching on and off, might induced back EMF flying back the A4988 and cause trouble. I might be over worrying. though.
 

« first day (1 day earlier)      last day (18 days later) »