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    Nema 17 Stepper motor for 3D Printer, 12V 0.4A, 2 phase 6 wires

    The Nema 17 stepper motor is a professional and high precision stepper motor with 1.8 deg. step angle (200 steps/revolution), 2 phase 6 wires, high holding torque.
    SKU: ATO47-0406A

    12V 0.4A, 2 phase 6 wires Nema 17 stepper motor, with 1.8 deg. step angle (200 steps/revolution), is perfect for small robotics and automation projects. Cheap price and direct sale by manufacturer.

    Basics Model ATO47-0406A
    Step Angle 1.8°
    Length 47mm
    Weight 0.35kg
    Voltage 12V
    Current 0.4A
    Resistance 30Ω
    Inductance 38mH
    Motor Leads 6
    Rotor Inertia 68g-cm2
    Maximum Static Torque 44oz-in/3.17kg-cm
    Technical parameters Step Angle Accuracy ±5% (full step, no load)
    Resistance Accuracy ±10%
    Inductance Accuracy ±20%
    Temperature Rise 80℃ Max. (rated current, 2 phase on)
    Ambient Temperature -10℃~+50℃
    Insulation Resistance 100MΩ Min. 500VDC
    Dielectric Strength 1Min. 500VAC·5mA
    Shaft Radial Play 0.06Max. 450g
    Shaft Axial Play 0.08Max. 450g

    Nema 17 dimensions wiring diagram
    Tips: Why stepper motor cannot start at higher velocity and accompanying whistler?
    The stepper motor can run normally at low velocity, and cannot start at certain higher velocity and accompanying whistler.
    There is a technical parameter for the stepper motor: no-load start frequency. That is, the stepper motor can normally start pulse frequency under no-load. If the pulse frequency is higher than the value, the motor cannot normally start, the stalling or self-locking may occur. Under the circumstance of load, the start frequency shall be lower. The pulse frequency should have acceleration so that the motor rotates at high velocity. That is, the start frequency is low and then rises to the anticipated high frequency according to the acceleration (the motor runs at from low velocity to the higher one).
    Except foregoing reasons, the reason for causing whistler may also be for big load. If the motor rotates at high velocity, the output torque of the motor will decreases. However, if the load requirement cannot be satisfied, stalling of motor will occur and whistler will be changed along with the change in frequency, to which the solution is to reduce the rotational velocity or replace for the motor with larger torque. Besides, after the motor rotates at high velocity and then stops, the transient whistler will be caused, which is resulted from chopping of phase current. It is only necessary to set the automatic semi-flow on the stepper driver board as effective.

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