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Over the many years, there have been many technical papers and articles about which motor is the best. The short and sweet answer is - let's talk about the application. More
recently a number of papers and articles have appeared that compared each motor's advantages and disadvantages in generic or specific terms. Many times, the methods used to drive and control these motors are not completely described due to the many control schemes available for use. A few articles focus on just the open loop step motor and the closed loop servo motor advantages and disadvantages in a laundry list format. This article is attempting to "drill down" into the reasons why and to describe how it is done.
KEB America announces the release of the new STEEL IT epoxy coating for servomotors. When motors are used in applications that are exposed to moisture and chemicals - such as food and beverage processing - they require special design considerations to ensure they will withstand the environment. The new STEEL IT epoxy coating option from KEB America provides a washdown servomotor with many of the benefits of a stainless-steel motor, but at a fraction of the cost.
Couplings. There certainly is no shortage of couplings - or things to couple them with. There also seems to be no lack of applications for them. You say you need to reduce the transmission of shock loads from one shaft to another? That's a classic application for shaft couplings; but really, couplings are application-intensive. They're everywhere.
It is hard these days to find any device that is not IoT-compatible or WiFi-connected. I recently had a new well pump installed that requires an iPhone for setup, which makes it hard for me to check or change the setup since I do not own an iPhone. In Olden Times, you had potentiometers or RS-232 connections - and that was fine.