Portescap in Motion

Tips to Avoid Stepper Motor Resonance Problems

Posted by Daniel Muller   Feb 04, 2022

Tips to Avoid Stepper Motor Resonance Problems 

When an application requires a reliable, low-cost motor with simple operation, stepper motors can be hard to beat. They can be driven step by step without needing an encoder or Hall sensor for rotor position feedback. However, the same straightforward design and driving method that makes stepper motors popular can lead to resonance problems in certain conditions. 

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Topics: Stepper Motors, Encoders, Portescap, prevent resonance, synchronization, holding torque, friction, braking torque, positioning applications, resonance, avoid resonance, damping, commutation, natural frequency, avoid natural frequency, inertia, microstepping, viscous friction

Sterilizable Encoders and BLDC Motors Drive Surgical Hand Tool Advances

Posted by Andrew Sharp   Sep 28, 2021

Sterilizable Encoders and BLDC Motors Drive Surgical Hand Tool Advances


 As handheld surgical tools gain wider adoption, there’s a growing demand for smaller, lightweight devices that can offer more capability and precise motion profiles. When it comes to brushless DC motors (BLDC) commonly used in handheld surgical tools, magnetic encoders provide the high-resolution feedback that makes high-performance drive systems possible, and they offer many benefits. However, not all encoder/feedback technologies are the same.  Here are some situations that call for an encoder as part of a drive system:

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Topics: BLDC Motors, Encoders, feedback sensors, motion system, brushless DC motor, angular position control, torque control, integrated BLDC motor and encoder, surgical hand tools, magnetic encoders, motor feedback, high resolution feedback, motor position, velocity control, motor control, motion control

Encoders Provide Motor Speed and Position Control

Posted by Chris Schaefer   Aug 31, 2021

How Encoders Provide Motor Speed and Position Control 

In many mechanical systems, precise motion hinges upon effective monitoring and control of the motor. Encoders make motion control possible by sensing the motor’s speed and position and sending feedback signals to control components. Two square waves, or channels, shifted 90 electrical degrees from each other, along with an optional index pulse that occurs once per revolution, encode the angular position data. 

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Topics: Motor Application Tips, Encoders, motor performance

Why An Encoder?

Posted by Chris Schaefer   Jun 16, 2020

Encoders provide feedback for accurate control of speed and positioning. The rotor angular position is given through two square waves 90 degrees shifted and an optional index pulse occurring once a revolution. There are multiple technologies to get these results.

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Topics: Motor Application Tips, Brush DC Motors, Encoders

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