Electric actuators double the eject speed of pneumatic actuators

SMAC Moving Coil Actuators reached a cycle rate of 2400 ppm (40 Hz) with their new LCB model electric actuator, meeting the target set by several leading packaging OEM’s. The fastest pneumatic actuators generally reach a peak speed of 1200 ppm. By doubling the speed of pneumatic actuators, SMAC can greatly improve the efficiency of […]

When are worm gears self-locking, and where is this useful?

Worm gears are often used for their ability to provide large speed reduction and high torque multiplication. But their self-locking properties can also be beneficial in many applications.  In a worm gear assembly, the worm is typically the driving component. Self-locking means that the gear cannot drive the worm. In other words, back driving is […]

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, […]

Helical gears: What are they and where are they used?

Helical gears and spur gears are two of the most common gear types and can be used in many of the same applications. Spur gears are simple and inexpensive to manufacture, but helical gears offer some important advantages over spur gears. The teeth of a helical gear are set at an angle (relative to axis […]

Microstepping basics

Microstepping is a method of controlling stepper motors, typically used to achieve higher resolution or smoother motion at low speeds. Stepper motors move in discreet steps, or fractions of a revolution. For example, a stepper motor with a 1.8 degree step angle will make 200 steps for every full revolution of the motor (360 ÷ […]

What are the drawbacks to using a planetary gearbox?

A planetary gearbox offers high torque transmission with good stiffness and low noise, in a more compact footprint than other gearbox types. The planetary gearbox design is fairly simple, consisting of a central sun gear, an outer ring (also referred to as an internal gear, because its tooth face inward), planetary gears, and a carrier. […]

How to improve ball screw rigidity

Ball screw rigidity depends not only on the screw shaft and ball nut, but also on the thrust bearings and on the ball nut and bearing housings. Where: Rtot = Rigidity of the screw system (N/μm) RS = Rigidity of the screw shaft (N/μm) RN = Rigidity of the ball nut (N/μm) RB =  Rigidity of the […]

Guide Master from Samick Precision Industry: The masterpiece of precision guides

Guide Master was developed to meet market demands for precision applications such as semiconductor, LCD, LED, and secondary battery production processes. The masterpiece of precision guides Features of Guide Master linear guide include: Higher load capacity: With 8 rows of needle bearings in its octagonal design, Guide Master has more points of contact between post and […]

Spur gears: What are they and where are they used?

Spur gears are a type of cylindrical gear, with shafts that are parallel and coplanar, and teeth that are straight and oriented parallel to the shafts. They’re arguably the simplest and most common type of gear – easy to manufacture and suitable for a wide range of applications. The teeth of a spur gear have […]

Common applications for air bearings

Air bearings offer numerous advantages over mechanical bearings such as profiled linear guides and crossed roller slides. But they are still considered by many designers and engineers to be a high-cost solution, primarily for niche applications that require extreme precision. However, their benefits include more than just high precision, and cost is being driven down […]

Hybrid linear stepper motors: Operation and applications

Like servo motors, stepper motors are available in both rotary and linear designs. When an application requires force (rather than torque) output and can operate in open loop control, a linear stepper motor is often the preferred solution. Although linear stepper motors are available in both variable reluctance and hybrid designs, the more common version is […]

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 […]

Why is resonant frequency important in piezo applications?

Resonance occurs when the resonant frequency (also referred to as the natural frequency) of an object or system is equal or very close to the frequency at which it is being excited. This causes the object or system to vibrate strongly and can result in unexpected – and sometimes catastrophic – behavior.  When one oscillating object or system (a […]