What is stepper motor driver subdivision?
A more accurate description of the driver subdivision characteristics is the number of runs, and the number of runs that refers to the number of pulses required for each turn of the stepper motor at run time. FY86EL402A motor has 50 teeth, if the number of beats operation is set to 160, then the stepping motor rotates a circle requires a total of 50 x 160 = 8000; the corresponding step angle is 360 degrees, 8000 = 0.045 degrees. Note that if the number of hits is set to 30, the corresponding fine fraction is 7.5, not an integer.The subdivision function is generated by the phase current of the stepper motor precisely controlled by the stepper motor, independent of the motor.
In brief, a fine fraction is the true step angle of a motor when it is running. As can be seen from the table: stepper motor driver in the 10 sub state, the step angle only for "natural motor step angle '1/10, that is to say: when the driver operating in segments of the whole step state control system, each made of a pulse of stepping motor, rotate 1.8 degrees; and driver working in 10 segments when the motor rotation only 0.18 degrees, this is the basic concept of subdivision.
To understand the subdivision, we must first clarify the concept of step angle: it represents the angle of rotation of each step of the control system. The factory motor gives a step angle value, such as FY86EL402A type motor is given a value of 0.9 DEG /1.8 DEG (said half step work for 0.9 degrees, the whole step was 1.8 degrees), this step can be called the "inherent motor step angle", it is not necessarily the work of actual motor when the real step angle.
