Stepper motor pullout torque is the highest torque a stepper motor can output at a given speed without losing steps. Manufacturers find a stepper motor’s pullout torque by accelerating the motor up to the target speed and then increasing the torque load until the motor starts missing steps or stalling. Performing this test operation over […]
Motors
FAQ: How do stepper motors handle inertia mismatch?
Inertia mismatch is the difference between the inertia of the system and inertia of the stepper motor. A large inertia mismatch is usually best avoided for machines run by stepper motors. One, the stepper motor itself has inertia it must overcome, in addition to the inertia of the system it drives. Two, friction further affects […]
FAQ: What are hybrid stepper motors?
Hybrid stepper motors combine aspects of both permanent magnet (PM) and variable reluctance (VR) stepper motors. Like PM motors, they contain a permanent magnet in the rotor teeth. Two sets of teeth called cups ring the rotor. One ring is all south poles, and the other ring is all north poles. Like VR motors, hybrid […]
FAQ: Aren’t heat and noise some common stepper motor problems?
Heat and noise both depend on the type of stepper motor, the conditions in which it operates, and what functions the motor serves in the application. Permanent-magnet stepper motors are usually most quiet, as they have a smooth rotor. Hybrid stepper motors are quiet as well. In contrast, variable-reluctance stepper motors are the noisiest type […]
FAQ: What is pole count and why does it matter?
Simply defined, a pole is a north or south magnetic field of force that is generated by a permanent magnet or current passing through a coil of wire. For stepper motors, however, this definition does not necessarily translate to a simple definition of pole count. Different manufacturers use different names to refer to their poles […]
Spectral Decomposition for fast servo control from Delta Tau
Delta Tau now offers a new control method called Spectral Decomposition to improve the productivity of systems that use fast-tool actuators. Spectral Decomposition works with a variety of fast-tool actuators—including voice-coil motors, piezo crystals, laser galvanometers and magnetostrictive transducers. These actuators have high bandwidth, but limited travel. So they are typically paired with a standard […]
New brushless DC motor and gearhead by maxon with high rpm, power and both are sterilizable
The new brushless BLDC motor EC 19 has been specially designed for high speeds and features low heat development and extremely quiet and low-vibration running. It has applications in centers for miniaturized processing, hand-held tools and medical technology. When combined with planetary gearhead GP 19 M, many possible variations are available for applications in these […]
maxon’s new high power motor can withstand high temperatures, pressures and deep depths
The new, electronically commutated EC-4pole 32 HD with planetary gearhead motor by maxon precision motors has all the features of its predecessor, the Heavy Duty Motor EC 22 HD, but with a larger and more powerful size. It is designed for extremely rough operating conditions, particularly applications in deep drilling. Deep drilling technology makes it […]
How to change a servomotor’s inertia ratio to boost efficiency
By Hurley Gill • Senior Systems and Application Engineer | Kollmorgen Servomotor-inertia ratios impact overall machine efficiency, and their use has evolved with servo-drive technology. So now, the newest digital servo-drive and feedback technologies can get higher inertia ratios while maintaining stable control to target velocities and positions. That can boost design efficiency, especially for […]
FAQ: What are piezo elements and piezo motors?
Piezo elements are ceramics that change shape when subject to electricity or (when subject to mechanical loading) output electricity. Manufacturers process and press plumbum, zirconate, titanate (PZT) powder together and fire it into a quartz. Then they integrate the ceramic with ferroelectric material to make electrodes. Finally, manufacturers apply electromagnetic fields to the piezo elements […]