Stepper motor when the stepper motor drive power at a certain phase, in the next electric phase is different, if and when the stepper motor can appear & other; Shake & throughout; Power, in order to eliminate the phenomenon of the jitter must be the phase of memory. Stepper motor run sequence for eight, assuming that stop in step 4 and power cuts, after power on again, if at the beginning of the 4th position directly driven step 1 will appear a leapfrog. If the system is still on the step 4, still can remember then will be able to correct orders go step 5 or step 3. At the moment there is a power most of the stepper motor driver haven't phase memory function, especially the common use special IC stepper drive, dedicated IC reset foot after power up reset signal motor phase will be reset to the initial value, the jitter of electricity should is inevitable. Even with it also have to determine the absolute value of servo motor and correction, can also be seen as jitter. Or strictly speaking, there is no electricity no shaking of the motor. The key is how much the jitter effect on your application. It is best to coordinate the absolute stop, electricity system reset after check the origin, then run to the front of the power of the absolute coordinates.
