Service FAQ

Common problems and solutions of stepper motor

时间:2010-03-13 13:22

一、How to control the direction of stepper motor?

  1、The direction level signal of the control system can be changed.

  2、You can adjust the wiring of the motor to change the direction, as follows:

  For two-phase machines, only one phase of the motor line is switched to the drive, such as A+ and A- switches.

  For three-phase motors, the adjacent two phase motor lines are exchanged, such as: A, B, C, three-phase, switching A, B two phases can be.

二、Stepper motor vibration, noise is also very large, what is the reason?

  This happens because the stepper motor works in the oscillating zone and solves the problem:

  1、Change the input signal frequency CP to avoid the oscillation zone.

  2、The use of subdivision drives, so that step angle reduction, smooth running.

三、Why stepping motor after power on, the motor does not run?

  For several reasons, the motor will not turn:

  1、Overload blocking turn (at this time the motor whistle)

  2、Whether the motor is offline

  3、Does the control system have a pulse signal to the stepper motor driver and is there a problem with the wiring?

四、Stepper motor jitter can’t continue running, how to do?

  In this case, first of all, check the motor winding and drive connection is not connected

  Check the frequency of the input pulse signal is too high, whether the lifting frequency design is unreasonable.

五、What is the offline signal FREE for a hybrid stepper motor driver, in what circumstances?

  When the offline signal FREE is low, the current output to the motor is cut off, and the motor rotor is in free state (offline). In some automated devices, if the drive is powered up, ask for it

  Direct rotation of the motor shaft (manual), you can set the FREE signal low, so that the motor offline, manual operation or regulation. Once the manual is completed, the FREE signal is raised to continue automatic control

六、How to choose stepper motor driver power supply?

  Determine the power supply voltage of the drive and then determine the operating current; the power supply current is generally determined based on the output current I of the drive. If linear power is used, Supply current generally recommended I 1.1 ~ 1.3 times; if the use of switching power supply, power supply current is generally available Take I 1.5 to 2 times.

七、How to select the stepping motor driver voltage?

  Our stepper motor drivers are wide pressure input, input voltage range can be chosen; power supply voltage is usually based on motor speed and response requirements to choose. If the motor works at a higher speed or requires faster response, then the voltage is also high, but note that the ripple of the supply voltage can’t exceed the maximum input voltage of the drive, otherwise it may damage the drive. If the lower voltage is selected, it is beneficial to the smooth running of the stepping motor, and the vibration is small.

八、Does the subdivision of a subdivision drive represent accuracy?

  Also called the subdivision step, the main purpose is to reduce or eliminate the low-frequency vibration of the stepper motor to improve the accuracy of the motor running just a functional subdivision. For example, a two-phase hybrid step angle of 1.8 Eve joy stepper motor subdivision driver, if the fine fraction set for 4, so the motor running at a resolution of 0.45 Eve joy each pulse, the precision of motor can achieve or close to 0.45 Eve joy also depends on the driver, the subdivision precision of current control and other factors. The accuracy of subdivision drivers of different manufacturers may vary greatly; the larger the fraction is, the more difficult it is to control the accuracy.

九、Why does the torque of stepping motor decrease with the increase of speed?

  When the stepper motor turns, the inductance of each phase winding of the motor will form a reverse electromotive force; the higher the frequency, the greater the reverse electromotive force. Under its action, the phase current decreases with the increase of frequency (or speed), which leads to the decrease of torque.