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Danielle Collins

What are double- and triple-stack hybrid stepper motors ?

April 13, 2021 By Danielle Collins Leave a Comment

Of the three primary stepper motor designs — permanent magnet, variable reluctance, and hybrid — hybrid stepper motors are arguably the most popular in industrial applications, combining the best performance characteristics of permanent magnet and variable reluctance types. Hybrid stepper motors are constructed with a rotor made of two sections, or cups, with a permanent […]

Filed Under: FAQs + basics, Featured, Industry News, Stepper Motors

What are different ways to express a gear ratio?

April 9, 2021 By Danielle Collins Leave a Comment

gear ratio

In motion control systems, gears are used to change the torque and speed delivered by a motor to a driven component. Depending on how the gears are arranged, they can either increase the delivered torque and decrease the output speed (the most common arrangement in motion control applications) or decrease the delivered torque and increase […]

Filed Under: FAQs + basics, Featured, Gears + Gearing

Absolute encoder interfaces: Differences between SSI, BiSS, Hiperface, and EnDat

April 2, 2021 By Danielle Collins Leave a Comment

absolute encoder interfaces

Absolute encoders can communicate with controllers through parallel or serial wiring, over a fieldbus, or via an Ethernet-based protocol such as EtherCAT. Of these options, serial communication is a simpler solution than parallel wiring (which requires a twisted pair of wires for each bit of output) and is well-suited for applications that aren’t complex enough […]

Filed Under: Absolute Encoders, Encoders, FAQs + basics, Featured

What are multi-stage gearboxes and when are they used?

March 29, 2021 By Danielle Collins Leave a Comment

multi-stage gearboxes

Gearboxes are commonly used in motion control applications to change the output speed and torque from a motor to a driven component. By using a smaller gear with fewer teeth (commonly referred to as a pinion) to drive a larger gear with a higher number of teeth, the torque delivered to the load is increased while […]

Filed Under: FAQs + basics, Featured, Gears + Gearing

What is a tachogenerator and when is it used?

March 15, 2021 By Danielle Collins Leave a Comment

DC tachogenerator

There are several ways to measure the position of a rotary axis, and some position measuring devices, such as incremental and absolute encoders, can also derive the speed of the axis by evaluating a combination of distance, time, and pulses. But for applications that require only speed measurement — without position information — a tachogenerator may […]

Filed Under: Encoders, FAQs + basics, Featured

What are radial and axial runout and how do they affect rotary tables and stages?

March 8, 2021 By Danielle Collins Leave a Comment

rotary actuator sizing

Runout is a dimensional specification that defines error in the motion of a surface as it moves relative to a datum. The official geometric dimensioning and tolerancing (GD&T) definition of runout applies to the variation of a circular feature — such as a shaft or spindle — as it rotates over 360 degrees, although the term […]

Filed Under: FAQs + basics, Featured, Rotary Tables

How to calculate required input power for a gearmotor

February 26, 2021 By Danielle Collins Leave a Comment

gearmotor input power

The first place to start when sizing a gearmotor is to determine the required output torque and speed. But once torque and speed are defined, you’ll also want to know the required input power for the motor — particularly if the gearmotor uses an AC induction motor, where the power rating (typically given in horsepower) […]

Filed Under: FAQs + basics, Featured, Gearmotors

What is AS-I Safety and what are its benefits for motion systems?

February 19, 2021 By Danielle Collins Leave a Comment

When sensors, actuators, and other lower-level components are used in a functional safety capacity, AS-Interface Safety at Work offers a simple, efficient, bus network for monitoring these safety devices — alongside standard, non-safety devices — on the AS-Interface cable. Recall that actuator-sensor interface (AS-Interface, or simply AS-I) is a master-slave bus that operates at the […]

Filed Under: FAQs + basics, Featured, Fieldbuses, Networking + IoT

Swiss precision motors handle valuable Mars soil samples

February 18, 2021 By Danielle Collins Leave a Comment

maxon precision motors

Was there once life on Mars? This is the question that one of the most complex robotic systems ever built by humankind has set out to answer. Several of maxon’s electric drives are used for handling the soil samples — and to control the first Mars helicopter. The rover named Perseverance entered the atmosphere of […]

Filed Under: DC Motors, Drives + Supplies, Industry News

How to calculate crossed roller bearing life (with various load types)

February 11, 2021 By Danielle Collins Leave a Comment

crossed roller bearing

A crossed roller bearing is a type of rotary bearing that uses cylindrical rollers arranged in a crisscross pattern, with each roller oriented at a 90 degree angle relative to the one adjacent to it. This arrangement allows crossed roller bearings to withstand radial, axial, and moment loads, so they can often replace dual-bearing arrangements, for […]

Filed Under: Bearings, FAQs + basics, Featured, Rotary Tables

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