As electric rod-style actuators overtake fluid power in a variety of high-force applications, it is important to understand how different screw technologies compare in the search for optimum performance and low life-cycle cost. By Daniel Schmit • … [Read More...]
FROM THE EDITORS
How to calculate maximum encoder speed for linear and rotary designs
When choosing an encoder for motion applications, a few specifications immediately come to mind. What sensing technology should you use? What accuracy and resolution do you need? Does the application … [Read More...]
What are Hertz contact stresses and how do they affect linear bearings?
Linear bearings that use balls or rollers to carry a load are subjected to Hertz contact stresses — a type of material stress that plays a significant role in determining the bearing's load capacity … [Read More...]
How roller-screw and ball-screw actuators compare in high-force applications
As electric rod-style actuators overtake fluid power in a variety of high-force applications, it is important to understand how different screw technologies compare in the search for optimum … [Read More...]
High-precision vertical elevator stages from OES
Two new high-precision Z-Axis Elevator Stages from Optimal Engineering Systems, Inc. (OES), The AZV9010 and the AZV9020, are Motorized Z-Axis Linear Positioning Stages featuring vertical travels of 10 … [Read More...]
Bearing damage: What’s the difference between brinelling, spalling, and fretting?
Bearing damage, and ultimately, failure, can be caused by a variety of conditions, including improper mounting, poor lubrication, and overloading, to name a few. The mode of damage — what actually … [Read More...]
Low-power voice-coil actuator for cryogenic environments
H2W Technologies’ new high-force, non-commutated dc linear actuator, otherwise known as a direct-drive voice-coil actuator, is designed specifically for use in cryogenic environments. Material choice … [Read More...]
Full extension telescoping rails feature smooth sliding
LM76 has added a new series of 100% extension rails to their extensive product line of linear motion components and complete linear motion systems. The exclusive distributor of SAIBO Linear Motion … [Read More...]
Transport and positioning perfected: Flexible Transport System FTS from Rexroth
With its linear motor-driven transfer system, Bosch Rexroth serves a wide variety of work specifications. For the highly dynamic transport and exact positioning of materials and workpieces, … [Read More...]
Which type of linear actuator is best for thrust forces?
When an application requires pure thrust forces, the best type of linear actuator is often a rod-style actuator. Also referred to as "thrust actuators" and (when a motor is integrated) "electric … [Read More...]
What’s the difference between a servo drive and a motion controller?
Servo systems are made up of four key parts: a motor, a feedback device, a servo drive, and a motion controller. The servo drive and motion controller work together (supported by information from the … [Read More...]
Exlar GTX now with Hiperface DSL Stegmann absolute encoders
Curtiss-Wright Corporation’s Industrial Division announced that its Exlar facility, located in Chanhassen, MN, has added Hiperface DSL Stegmann absolute encoders as a part of their available Rockwell … [Read More...]
When to consider Kevlar reinforced belts for linear motion applications
Both types of belts commonly used in linear positioning applications — V-belts and synchronous designs — have internal tensile cords that serve as the primary load-carrying component. Or, as one … [Read More...]
New voice coil stages feature 1-micron positioning resolution
The compact open aperture HCDS-051-032-013-01-B1-30 and the HCDS-051-032-013-01-B1-01 Voice Coil Stages from Moticont have a footprint of just 2.000 in. (50.8 mm) wide by 5.000 in. (127.0 mm) long and … [Read More...]
PHD Inc. offers linear slides that are IP54 and even IP67 rated (for washdown)
PHD Inc. offers electric Series ESU linear slides that are IP54 rated with magnetic band sealing for rugged protection. These are electric-motor and belt-driven linear actuators with a robust enclosed … [Read More...]
igus linear guides help drones repel pests
One Spanish OEM has developed a drone for pest control; the design features low-weight carbon linear guides and a micro energy chain and pillow block bearings manufactured by igus. The FitoStinger … [Read More...]
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