Engineers building linear motion systems can use ground-up DIY approaches or purchase complete turnkey solutions. Here we explain where each tactic is most profitable. By John Brokaw and Kent Martins | Valin Corp. How should designers pick between building linear-motion designs in-house or purchasing pre-engineered assemblies? What is there to consider when determining the best […]
New linear motor designs improve speed and positioning
Linear motors enable maximum precision and dynamic performance in various motion control tasks. These include not only rapid traverse, but slow, constant speed traverse of machine heads, spindle slides, tool management systems, part handling devices and more. There are considerable cost savings to be realized when various mechanical components are replaced by simple and efficient […]
What is cogging in linear motors?
Linear motors are generally classified by the construction of the motor’s primary part: ironless or iron core. In an ironless linear motor, the windings of the primary are embedded in an epoxy resin, whereas the windings of an iron core linear motor are mounted in an iron lamination stack. The lamination contains teeth, or protrusions, […]
High speed linear actuators: What qualifies them as high speed?
Like many terms used in the linear motion industry – “heavy duty,” “miniature,” and “corrosion-resistant,” to name a few – there is no industry standard that specifies what constitutes a “high speed” linear actuator. Nevertheless, there are some general guidelines that manufacturers follow when classifying and marketing their actuators as high speed. These guidelines are […]
What are can stack linear actuators?
Can stack linear actuators are based on can stack stepper motors, which are a form of permanent magnet steppers that consist of two stators (and therefore two coils) stacked on top of each other. The poles of each stator are “claw tooth” design and are offset from each other by one-half of the pole pitch. […]
MKS offers Newport high-performance Delay (linear-motor-driven) line stages
MKS Instruments now sells Newport DLS Series high-performance linear actuators called Delay Line Stages. The DLS series features affordable high performance linear-motor-driven stages with integrated motion controllers. Optimized for retroreflectors, repeatable femtosecond positioning and exceptionally fast traverse speeds, the compact stages are a perfect fit for spectroscopy applications that require single or multiple delay lines. With travel […]
Podcast: Scott of Nippon on iron core, U-channel, and tubular linear motors
In a recent Technology Tuesdays podcast, Brian Scott, application engineer at Nippon Pulse America, talked to me a little bit about linear motors including iron core, U-channel, and tubular linear motors … and the benefits and drawbacks of each. He also shed some light on the major design objectives OEMs cite when migrating axes to linear motors. Click here […]
What are linear stepper motors?
Like most linear motors, a linear stepper motor is essentially a variation of the rotary design, cut radially and laid out flat. Similar to their rotary counterparts in operation and performance, a linear stepper motor is typically run as open-loop systems and are capable of providing high resolution at high speeds and accelerations. The linear stepper motor almost […]
Nippon Pulse small-forcer linear servo motor for high-density applications
Nippon Pulse America Inc. now sells one of the smallest available linear motors for high-density applications — the L250SSS Linear Shaft Motor. It is a 25-mm-diameter linear servo motor with a single winding and our smallest available forcer – only 30mm in length, and with higher force than competing off-the-shelf motors. Its maximum usable stroke reaches to […]
Why use linear-induction motors — and could they drive Hyperloops one day?
Contributed FAQ courtesy H2W Technologies || Linear-induction motors work in applications that require rapid movement of large payloads. Linear-induction motors can output speeds to 1,800 in. per second (45 m/sec) or more … … and accelerations from 3 to 4 g. Standard LIMs can produce forces in the range of 720 lb (3,200 N) at a 3% duty cycle. […]
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