Common problems and solutions of stepper motors _ Industrial Automation

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First, how to control the direction of stepper motor.

1, can change the control system direction level signal

2, can adjust the wiring of the motor to change direction, the specific practices are as follows:
For the two-phase motor, only one phase of the motor line switch access to the drive, such as A + and a-swap.
For three-phase motor, the adjacent two-phase motor line exchange, such as: a,b,c three-phase, Exchange a,b Two-phase can be

Second, stepper motor vibration, noise is also very large, what reason.

This situation is due to the stepper motor working in the oscillating zone, the solution:
1, change the input signal frequency CP to avoid the oscillation zone.
2, the use of subdivision drive to reduce the angle of the step, smooth operation.

Third, why the stepper motor power, the motor does not run.

There are several reasons for the motor will not turn:
1, overload plugging (at this time the motor has squealing)
2. Whether the motor is in the offline state
3, the control system whether there is pulse signal to stepper motor driver, wiring is not a problem

Four, stepper motor jitter, can not run continuously, how to do.

In this case, first check the motor windings and drive connection is not wrong
Check whether the input pulse signal frequency is too high, whether the fluctuation frequency design is unreasonable.

Five, the hybrid stepper motor drive offline signal free in general under what circumstances use?

When the off-line signal free is low power, the current of the drive output to the motor is cut off and the motor rotor is in an idle state (offline state). In some automation equipment, if the drive in the case of constant electricity to direct rotation of the motor shaft (manual mode), you can set the free signal low, so that the motor off-line, manual operation or adjustment. After manual completion, the free signal is set high to continue the automatic control.

Six, how to select the Stepper motor driver power supply.

Determine the power supply voltage of the drive and then determine the operating current, and the current of the power supply is generally determined by the output phase current of the drive. If the use of linear power supply, the current generally preferable to the 1.1~1.3 times of I, if the switch power supply, the power supply current generally preferable to 1.5~2.0 times.

How to select the power supply voltage of stepper motor driver.

Stepper motor drives, are wide-pressure input, the input voltage of a large range can be selected, the power supply voltage is usually based on the motor's operating speed and response requirements to choose. If the motor operating speed higher or faster response requirements, then the voltage value is also high, but note that the power supply voltage ripple can not exceed the maximum input voltage of the drive, or may damage the drive. If the lower voltage is advantageous to the smooth operation of the stepper motor, the vibration is small.

Eight, the subdivision of the driver's fine fraction can represent precision?

Subdivision is also called micro-step, the main purpose is to weaken or eliminate the low frequency vibration of stepper motor, to improve the accuracy of motor operation is only a subdivision of the function of the technology. For example, the step angle is 1.8? Two-phase hybrid stepper motor, if the subdivision of the driver's fine fraction set to 4, then the motor's operating resolution of 0.45 per pulse, the accuracy of the motor can be reached or nearly 0.45, but also depends on the subdivision of the driver of the subdivision of current control accuracy and other factors. The precision of the subdivision drive of different manufacturers may vary greatly, and the precision of finer fractions is more difficult to control.

Nine, why the torque of stepper motor with the speed of the rise and decline? When the stepper motor rotates, the inductance of each phase winding of the motor will form a reverse electromotive force, the higher the frequency, the larger the reverse electromotive force. Under the action of the motor, the phase current decreases with the increase of frequency (or velocity), which leads to the decrease of torque.