Cause of servo motor error wrong position distance

Signs of servo motor running in the wrong position:

The servo motor runs in position to control the cutter or printing mold used in cutting machines and printers, when the error is running in the wrong position, it will run out of uneven products or the wrong size set.

Servo motors mounted on some types of cnc machines such as milling, plasma, laser, when the servo fails to run at the wrong position, the machining distance will be faulty, leading to a circle, then an ellipse or a square to a triangle.

Some other complicated machines such as automatic filling, packaging and labeling lines, when the servo fails, the product will be damaged or cannot be processed.

Causes of the wrong position of the servo motor:

Servo motor has wrong position distance error due to servo driver

– There are also cases where the servo motor is faulty at the wrong distance because the error comes from the driver, including some cases as follows:

    • Because the user has not installed or incorrectly installed the parameters related to the electromagnetic gearbox, choose the pulse receiving type or connect to the wrong pulse receiving wire.
    • The auto tuning operation has not been performed to detect the motor load or the default parameter is too low, leading to incorrect running position.
    • Running in the wrong position and distance may also be because the installer has not selected the correct mode to control position, speed and torque.
    • For some servo motor applications operating in speed control mode, you need to set additional parameters related to acceleration and deceleration time.

Servo motor wrong position distance error due to mechanical

    • The first and also relatively common cause for the servo motor to run at an error of position or distance is because the mechanical system during operation is corroded by friction such as some parts of the pulley, belt, etc. sprockets, gears should lead to make the machine run not in the correct position and distance as the original. Often, machine manufacturers also calculate this compensation plan by pre-programming it in the plc or microprocessor circuit board of the machine or line.
    • Servo motors with gear reducers can also be run in the wrong position for a long time because this gearbox has been loose for a long time or damaged by the inner planet, leading to incorrect operation. There are some cases where the servo motor runs in the wrong position, the distance due to the gear reducer attached to the servo has an odd gear ratio that the user does not know.
    • In some other cases, the servo motor runs at the wrong position, the distance is also due to the fact that the pulley on the motor core is not stiff enough or the belt or chain system attached to the motor is slack, resulting in poor operation. error.

Servo motor has wrong position distance error due to servo motor

    • There are cases where the machine designer chooses the wrong type of motor with the wrong power and speed, which leads to the machine being run at the wrong position and distance, leading to incorrect operation. Therefore, when choosing a servo motor, you should pay attention to calculate the correct and sufficient capacity and speed for the system using servo motor.
    • There are also cases where the servomotor’s incorrect operation is due to internal damage to the motor including 3 parts: the internal coil, the permanent magnet core or the rotation sensor mounted on the rear of the motor. Damage to these parts will cause the engine to fail to function as originally set. However, this usually happens rarely because these damaged parts will have an error warning on the driver.

– Some other causes of servo motor running in the wrong position distance

    • The servo motor can also be run at the wrong distance because the wires to the plc, the circuit board to the driver are short, resulting in discontinuous control signals and lack of control pulses.
    • For some factories and companies that use inverters for large-capacity 3-phase motors, it can create harmonic interference on the power grid, causing the servomotor to run at the wrong position and distance. The solution is to install power filter for servo, plc and inverter.
    • There are also cases where the servo motor is running at the wrong distance, the position is because the program on the plc or the microprocessor board is not running correctly, when this is the case, it requires you to have technical expertise to be able to fix the problem.

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E1000 Series – Specializing in HVAC

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