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 […]
FAQs + basics
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 […]
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 […]
What are shock and vibration absorbers? A technical summary
Motion is present in almost all industrial automation systems. Stopping or changing the direction of that motion releases kinetic energy, which can cause shock and vibration to occur. Any sudden shock in a system can cause immediate damage to the overall machine and the components it may be manufacturing or processing. And consistent vibration inputs […]
FAQ: Where do brush dc motors still make sense?
Brush dc motors are a mature technology that’s been around for more than a century. So with brushless motors and an ever-increasing array of controls for all motor types, why do engineers still use brush motors? After all, it’s common knowledge that brush motors exhibit wear at their brush-and-commutator interface. The truth is that brush […]
What are rack-and-pinion sets? Technical summary
Updated May 2016 || Options for linear motion abound, but today’s rack-and-pinion sets are precision mechanical devices that in some cases deliver performance rivaling that of electromechanical alternatives. First modernized 150 years ago to drive railway trains up steep passages, rack-and-pinion sets today are useful in everything from small consumer devices that move a few […]
What is a gearmotor? Technical summary for engineers
Updated May 2016 || By Miles Budimir • Senior Editor Gearmotors are a fairly well-established technology. And recently, there is renewed interest in gearmotors, following a trend in integrated systems in general. More specifically, rising energy costs are driving demand for improved process efficiencies. This presents an opening for gearmotors that can be used in […]
Wave spring sizing and selection
Although wave-spring applications abound, there are basic rules to define spring requirements and determine whether a design can use a stock or standard spring or needs a special wave spring. The first and most important consideration is the load the application will apply to the wave spring. Required load is defined as the amount of axial […]
Basics of conveyors: Technical summary of industrial material-handling options
Updated August 2019 || Conveyors are automated tracks that move bulk material or discrete products from one area to another. They’re the backbone of myriad material-handling applications to improve efficiency and throughput. Recent advances in materials, controls, and modular subcomponents have spurred new large conveyors for bulk material transport, miniature conveyors for discrete sorting, and […]
Couplings for PT and motion designs: Technical Summary
Updated May 2015 by Mike Santora || Couplings are devices that connect two shafts for transmission of torque from one to another, usually on rotating equipment such as motors. They should be designed to allow for some end movement. Two types are available — rigid and flexible. Flexible couplings compensate for misalignment, while rigid couplings work […]
