Among them, the curve 3 current largest

Among them, the curve 3 current largest, highest or voltage; Curve 1 current minimum, or voltage minimum, curve and load of the point of intersection for load the maximum speed

of point.
To
rotating joints make the average current is big, as far as possible improves the driving voltage, make the small inductance large current of motor.
7, motor resonance point:
Stepping motor are fixed resonance area, two, four phase induction son type stepping motor resonance area is in commonly 180-250 between PPS (step pitch Angle 1.8 degrees) or in

400 about PPS (step pitch Angle is 0.9 degrees), motor drive the higher the voltage, the motor current, load the lighter, the motor volume is smaller, the resonance zone upward

migration, and vice versa, in order to
rotary union make the motor output electric moment, do not break step and the system noise is reduced, the general working point shall offset resonance

zone more.
8, motor and reversing control:
When the motor winding energizing sequence for AB - BC - CD - DA or () as a forward, energizing sequence for DA - CA - BC - AB or () for reversal.
Three, drive control system composition
Use, control stepping motor must by ring pulse, power amplification, etc of the control system, and the block diagram are as follows:
1, pulse signal is produced.
The pulse signal by SCM or general CPU produce, general pulse signal of the duty ratio 0.3-0.4, the motor speed, the higher the duty ratio is.
2, signal distribution
My factory production induction son type stepping motor with two, four phase motor is given priority to
fiber optic rotary joint , two phase motor work means has two phase 4 beats and two phase eight

take two kinds, specific distribution is as follows: two phase four shoot, step Angle is 1.8 degrees, Two phase eight clap for, step Angle is 0.9 degrees. Four phase motor

working way also has two kinds, four phase 4 beats for AB - BC - CD - DA - AB, step Angle is 1.8 degrees, Four phase eight clap for AB - B - BC - C - CD - D - AB, (step pitch

Angle is 0.9 degrees).