Hi all..
Im using six wire unipolar stepper motor(7.5degrees).
im able to rotate in half step mode..
Now i want to rotate in small angles(7.5).
I hav no idea..Plc anyone can guide me..
step is the angle that the stepper motor rotates for each clock cycle.. so to achieve that small angle you are talking about i think you have to gate just one pulse of the clock to the stepper motor....
if you have a 6 wire motor, it could be either a 3phase 2 wires per phase or a 5 phase 1 wire per phase + common, If it is a 5 phase then you can get a stepping resolution of around 125,000 positions per revolution.
This is archived because all multi phase "brushless" motors have "magnetic gearing" see https://www.infolytica.com/en/coolstuff/ex0106/Magnetic Gear B Field.avi
Each revolution requires the inner core to go though a large number of rotations before the outer core rotates once, and if each magnet is turned on one by one then you can see the tiny amount of outer movment even in a 3 phase motor.