Stepper motor stepper motor drives are used to drive for normal operation of the stepping motor, stepping motor drive is often used in the numerical control machine tools, computer embroidery machine, glue machine, automatic feeding system and other equipment. Because widely used industrial dosage is very large, nature is the probability of failure is high. Here is to analyze, stepper drives the common failure analysis and solution: 1, the stepping motor has been in a state of freedom, that MF signal is normal, appear this kind of circumstance of the solution, we will go to adjust MF signal circuit. Step 2, step motor appear lost phenomenon, this time of the first to see if shielded wire loose, is there any ground, view the subdivision is correctly set, if the current small might also increase the current at this time, to solve the problem. 3, alarm indicator, in this case, you need to check the voltage, and check the power supply. Another possibility is the stepper motor drive damaged, need to change the new stepper motor drives. 4, motor rotation direction errors, appear this kind of circumstance, the line is likely to be wrong. If line ruled out the wrong problem, that is the motor line open circuit, or is the signal may be interfered with, need to eliminate the interference problem. 5, the power light not bright light can be normal on TM or has been bright, this time may be a signal circuit without good reason, or drive selection is not correct. 6, blocking a stepping motor, which is what problem, motor torque force is too small, need to choose a big torque motor. If ruled out the problem, is to accelerate the time too short, you just need to increase the speed of time; If the voltage is too low is the current need to raised a little, to improve the current and voltage, in a proper range. 7, stepper motor shaft torque is not enough, but this may be the current small motor too much lead to damage of stepping motor, it needs the large current. 8, OC lamp can be bright, this is to protect the step motor drive itself, because maybe your current is too large, need to look at the line where there is a problem, the power can not be too low, needs to be electrified. 9, step motor vibration is what reason, may be caused by low voltage signal, need to use electrical shock point to stagger the vibration frequency and then to easy to exchange the same phase. 10, stepper motor drives the power light is not on, it could power failure, this time we need to check the power supply circuit of the power supply is there a line break.