hi all.....i had this 6 wire stepper motor i think the pair for the coil A (red and white red) coil B(green and white green) and the other two wire is black and white is for the common wire...my question is where should i connect the common wire..
my stepper motor has........ 2.0 curret amps....2.8 v.........1.4phase ohms should i connect the common wire to 5V supply to drive it?
That motor has low resistance windings (1.4 ohms), so you must drive it from a bipolar
chopper drive circuit, don't even think about trying to use an H-bridge or unipolar drive
circuit. 2A is a lot -- you really need a proper industrial stepper-drive controller rated for
2A, none of the small single-chip chopper drivers(*) will handle 2A without overheating.
(*) A4988, DRV8835, EasyDriver, etc etc.
The reason you need chopper drive is that the back-EMF from the motor will severely
limit the maximum step rate you can achieve when driven at 2.8V. To spin fast stepper
motors will need a supply able to overcome the large back-EMFs, yet the winding-current
must be limited to the rated value - this mandates chopper drivers that can control the
current independent of the back-EMF.