Servo Motor Versus Stepper Motor

Stepper motor versus servo motor is a question that has been asked by many people with projects where they could incorporate either motor. There are many benefits that the servo system has over the stepper system. Servo motors and servo amplifiers are designed to maximize efficiency between the motor and amplifier. This is done by commanding current only when the motor has to provide torque for the system. This is different than some stepper motors where they are commanding current continuously. This leads to poor efficiency as the usable energy that is commanded to the motor when it is not moving is dissipated into heat. Also, steppers have very poor torque characteristics at higher speeds.

When a stepper system utilizes microstepping up to 25,000 micro steps per revolution, it is important to note that since the stepper motor is open loop, it does not usually achieve the desired location, espe- cially under load. Particularly poor positional accuracy will result when using microstepping, which is primarily utilized for smoothness of motion, not accuracy.

The servo motor has an encoder which keeps track of the movement of the shaft. The encoder is con- nected to an amplifier where the encoder information is used to determine degrees of rotation of the motor shaft. This number is then compared with the number that it was commanded to move. The dif- ference then becomes an error signal to a high gain, high bandwidth digital servo loop within the servo amplifier. The error is always nulled to zero in steady state conditions. For this reason, you see the digital step servo never loses steps or position as a step motor can if it is inadvertently stalled and misses a step, thus losing position and requiring a re-homing cycle. A typical encoder is around 2500 lines of resolution. This allows for very precise movement. The number of lines on the encoder can be increased for better accuracy.

The typical stepper motor has a step size of 1.8 degrees. This is equivalent to having a 50 line en- coder which is a very low resolution encoder. Encoders range from 1000 to 5000 lines per revolution. As an example, a 1000 line encoder would have 20 times better resolution than a 1.8 degree stepper.

1000 line encoder = 4000 counts/revolution

1.8° = 200 counts/revolution

The typical stepper servo system will have added efficiency as well as performing the job in a smooth quiet manner. The stepper servo system is a upgrade for the customer who is serious about having their system move in the most precise manner possible. If the precision needs to be greater it is possi- ble to install a higher line encoder. Glentek typically installs 2500 line encoders on their Nema 23 size servo motors. A 2500 line encoder allows you to command a step of 1/10000th of a revolution. This provide excellent smoothness and accuracy and is very helpful for milling as well as precise move- ments.

Glentek Inc. 208 Standard Street, El Segundo, California 90245, U.S.A. (310) 322-3026

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SMC Networks Amplifier manual Servo Motor Versus Stepper Motor
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Amplifier specifications

SMC Networks Amplifier is a versatile device designed to enhance and extend wireless network coverage in both home and office environments. With the increasing reliance on Wi-Fi for accessing the internet, having a robust amplifier can significantly improve the quality and reach of your network signal. The SMC Networks Amplifier stands out for its user-friendly design, performance features, and advanced technologies.

One of the standout features of the SMC Networks Amplifier is its dual-band functionality. It operates on both 2.4GHz and 5GHz frequencies, providing users with the flexibility to choose the best frequency for their needs. The 2.4GHz band offers wider coverage and is ideal for basic tasks such as web browsing and email, while the 5GHz band provides faster speeds and is perfect for bandwidth-intensive activities like gaming and streaming.

The amplifier's smart signal indicator helps users find the optimal placement for their devices, ensuring that the amplifier can effectively boost the signal from the router. This feature eliminates the guesswork often associated with setting up network extenders, allowing for a seamless installation process.

In terms of technology, the SMC Networks Amplifier employs advanced MIMO (Multiple Input Multiple Output) technology. MIMO allows the device to send and receive multiple signals simultaneously, increasing throughput and improving the overall performance of the network. This is particularly beneficial in environments with many connected devices, where traditional amplifiers may struggle to maintain a stable connection.

Security is another priority for the SMC Networks Amplifier. It supports various encryption standards such as WPA2, ensuring that your network remains secure from unauthorized access. Additionally, the amplifier is compatible with a wide array of devices, from smartphones and tablets to smart home devices, making it an excellent addition to any modern network setup.

Another notable characteristic of the SMC Networks Amplifier is its sleek, compact design. It blends seamlessly with home or office decor and does not require extensive setup. The intuitive interface allows easy configuration, even for those with limited technical knowledge.

Overall, the SMC Networks Amplifier is an excellent choice for users looking to boost their wireless coverage. With its dual-band capability, advanced MIMO technology, robust security features, and easy installation process, it provides a comprehensive solution for enhancing Wi-Fi connectivity. Whether you are a casual user or a heavy internet user, the SMC Networks Amplifier is designed to meet your networking needs effectively.
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