Stepper motors go into linear actuators in two different ways

Stepper motors go into linear actuators in two different ways

Stepper motors that are traditional rotary motors couple to mechanical rotary-to-linear motion devices (often in the form of a threaded shaft that mates with traversing nut or carriage) to produce linear motion. In this actuator setup, the motor output shaft usually couples to the screw to turn it … and advance the nut (or carriage) and attached load. These are usually small designs that go into consumer products or small-stroke applications in industrial machines.




17HS24-2104S

Summary of linear stepper motors
Engineers most commonly use these linear actuators in larger installations; on axes that move heavier loads; and in high-end medical or material-handling applications such as pick-and-place machinery that require extremely high precision. Like rotary equivalents, linear stepper motors either use a variable reluctance (just described) or a hybrid mode of operation. A hybrid linear-stepper platen is like that of a variable-reluctance linear stepper. In contrast, the forcer has multiple permanent magnets, magnetic U-shaped cores (with coils around them) and a steel yoke.

Summary of rotary-stepper-driven axes
When engineers use rotary-stepper-driven axes instead of linear stepper motors, they face a different set of design considerations. For starters, the engineer must pick the leadscrew’s lead and pitch. Lead defines the distance a screw thread advances in one revolution. Pitch is the distance between adjacent threads. A small lead with more threads per inch outputs higher force and resolution; large leads (or fewer threads) output lower force but higher speed.

One final note on rotary-stepper-driven axes: Because these linear actuator stepper motor incorporate mechanical components, they exhibit wear and life limitations. That said, when engineers properly size for the load and create a forgiving operating environment (with low humidity, protection from harsh chemicals and dirt, and controlled temperature) rotary-stepper-driven exhibit long life—to millions of cycles.



http://www.fxstat.com/en/user/profile/zhidaowozzou4-182008/blog/34451057-Stepper-motor-for-a-mechatronic-application-is-so-important
https://bestnewkinder.blogspot.com/2020/02/what-is-pulse-needed-to-move-stepper.html