Ball nut preload offers several benefits to screw assemblies, but the most common reason for using a preloaded ball nut is to reduce axial play, or backlash, caused by clearance between the screw and nut raceways. Reducing this axial play does two … [Read More...]
FROM THE EDITORS
Ball nut preload: What effect does it have on bearing life?
Ball nut preload offers several benefits to screw assemblies, but the most common reason for using a preloaded ball nut is to reduce axial play, or backlash, caused by clearance between the screw and … [Read More...]
What is curvilinear motion and when is it used?
In single-axis motion systems, travel is typically either linear (in a straight line) or rotary (in a partial or complete circle). But some applications call for a system that combines straight … [Read More...]
Stepper motor performance: Is it possible to get high torque at high speeds?
The most notable stepper motor performance characteristics are precise positioning, good holding torque, and good low-speed torque characteristics. But in some cases, application parameters … [Read More...]
Actuators with extreme power density, reliability for aerospace applications
The R-Series actuators from Ultra Motion leverage years of heritage in high reliability actuator design for aerospace/spaceflight applications. Using Ultra Motion’s flight proven, patented Phase Index … [Read More...]
Motion controller basics: What are the differences between PLCs, PACs, and IPCs?
As the "brain" of a servo system, a motion controller is responsible for ensuring the motor is following the specified motion profile and correcting any errors between the commanded value (in terms of … [Read More...]
Pick-and-place applications with Festo tools — showing at Pack Expo
Festo offers software and hardware to shorten packaging-machine development time and reduce engineering overhead. These components, systems, and software tools will be on display at Pack Expo on … [Read More...]
High-resolution, high-repeatability XYR alignment stages from OES
Two new economical XYR (Theta) alignment stages from Optimal Engineering Systems, Inc. (OES) offer high precision and repeatability for industrial, medical, semiconductor, research, and laboratory … [Read More...]
Linear motion systems for packaging applications from Bishop Wisecarver
Bishop-Wisecarver offers product options that include UtiliTrak linear guides and LoPro linear actuators, to complete actuated system solutions. LoPro linear actuators excel in high speed, long … [Read More...]
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...]
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