20mm Two Phase Encoder Stepper Motor With Magnetic Encoder​

Product description

1.The rotation angle of the motor is proportional to the input pulse.

2.The motor has full torque at standstill.

3.Precise positioning and repeatability of movement since good stepper motors have an accuracy of 3 – 5% of a step and this error is noncumulative from one step to the next.

4.Excellent response to starting, stopping, and reversing.

5.Very reliable since there are no contact brushes in the motor. Therefore the life of the motor is simply dependant on the life of the bearing.

6.The motor’s response to digital input pulses provides open-loop control, making the motor simpler and less costly to control.

Specifications

Mode No:PEM20H228E1KzS

Mode No:PEM20H228E2KzS

Quality control process:

• Incoming inspection: The inspection shall be conducted according to the Requirements of the Incoming Inspection Specification or the product drawing
• Monitoring and measurement of production process (self-inspection - inspection - batch production)
• Final inspection and test
• All inspectors must be trained and then put on duty
• Nonconforming products shall be executed in accordance with Nonconforming Product Control Procedures
• Raw material inspection
• Inspecting according to the standard of testing raw material or the drawing
• Monitoring and measurement in production process
• Self checking-tested by QC-Batches production
• Final checking and make experiment
• All products should be through testing by the professional equipment
• Stepping Accuracy: ± 5%
• Resistance Accuracy: ± 10%
• Inductance Accuracy: ± 20%
• Temperature Rise: 80°C Max.
• Ambient Temperature: -20°C ... +50°C
• Insulation Resistance: 100MOhm min. 500V DC
• Withstand: 500V AC, 1 Minute

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Working principle of stepper motor

To make the motor shaft turn, first one electromagnet is given power, which makes the gear’s teeth magnetically attracted to the electromagnet’s teeth. The point when the gear’s teeth are thus aligned to the first electromagnet, they are slightly offset from the next electromagnet. So when the next electromagnet is turned ON and the first is turned OFF, the gear rotates slightly to align with the next one and from there the process is repeated. Each of those slight rotations is called a step, with an integer number of steps making a full rotation. In that way, the motor can be turned by a precise. Stepper motor doesn’t rotate continuously, they rotate in steps. There are 4 coils with a 90o angle between each other fixed on the stator. The stepper motor connections are determined by the way the coils are interconnected. In a stepper motor, the coils are not connected. The motor has a 90o rotation step with the coils being energized in a cyclic order, determining the shaft rotation direction. The working of this motor is shown by operating the switch. The coils are activated in series in 1-sec intervals. The shaft rotates 90o each time the next coil is activated. Its low-speed torque will vary directly with current.

Operation of Stepper Motor:

Stepper motors operate differently from DC brush motors, which rotate when voltage is applied to their terminals. Stepper motors, on the other hand, effectively have multiple toothed electromagnets arranged around a central gear-shaped piece of iron. The electromagnets are energized by an external control circuit, for example, a microcontroller.