Additional current stepper motor stepper motor itself is an approximation, and the output of the drive current pulse current, with a group of factory stepper motor drives allow current value have positive and negative error, owe good drive output current quality of plus or minus error by more than 20%, and the resistance of error of plus or minus of stepping motor is less than 15%, so the user does not have to deliberately to accounting stepper motor current value and the consistency of the drive current value. Stepper motor driver drive current setting requirements refer to the stepper motor extra current, under the condition of satisfaction of speed and torque, lower current slightly, can prolong the use life of drive and motor, in order to reach high performance and large torque output effect, demand in the current set larger demand together with the quality of the stepper motor and driver. For example, a company drive power choose 10 a power module, and set the current drive to reach 8 a, 8 in this case if setting the output current, a moment on electric power, plugging in a twinkling in the back emf will surpass 10. A, it is easy to burn drives. Within the scope of the drive safe use, also look at the connection way of stepping motor, such as extra 3 a 8 line motor, and connected in series connection method needs additional current setting is different, the drive of output current and peak current of uniform current is different. According to the connection way to set the current general current shall be set up in the range of 1. Within four times. Specific to the motor running for 1 hour in the future, step motor surface temperature for refer to important basis, the surface temperature from 70 degrees within safety, especially in winter, the motor surface temperature beyond 80 degrees, is about to alert. Theory shangbu motor magnets generally use 130 degrees, promised to the motor surface temperature reached 100 degrees, practice surface temperature reached 90 degrees motor output torque for thermal demagnetization attenuation, using life is also greatly reduced.
