Motion Control

High-Accuracy Closed Loop Force Feedback

Benefits of serial servo digital presses for force gauge specifications. Hand-driven press assemblies, which require a specific amount of force applied for a given amount of time, present challenges when attempting to accurately measure or replicate results in production or quality control processes. In contrast, servo-driven digital presses are able to provide accurate, consistent, and repeatable results while outputting trackable data. By controlling position and current, the servo-driven digital press allows for stable, accurate, and repeatable control.

Posted in: Bio-Medical, Briefs, Briefs

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Rotary Sensing Technologies for Medical and Robotic Shaft Angle Sensing Applications

This technical brief provides an overview of existing types of rotary sensor technologies, and compares the strengths and weaknesses of each type for use as through-hole shaft angle sensing devices. Today’s sensor technologies for robotic and medical applications include many devices that have evolved from industrial applications. Because of this general migration, they are not ideally suited to the requirements in new robotic and medical products. Specifically, conventional contacting and non-contacting sensing solutions do not offer the customization, small package size(s), and environmental and durability requirements that are so necessary in these custom applications.

Posted in: Bio-Medical, Briefs, Briefs, Positioning Equipment, Robotics, Sensors

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Underwater Autonomous Vehicles Combine Robotics and Vision to Inspect Oil Pipelines

Among the various components of a submarine pipeline, the vertical section known as a riser is critical to managing the pipeline. This section connects the piping that runs along the bottom of the sea with the floating production platform.

Posted in: Features, Articles

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Motion Control and System Engineering Considerations

Motion control choices are best made in light of the whole system architecture, as the selection of system architecture will drive not only the implementation and integration stages of the project, but also manufacturing and field service, and even the ability to ship and install the final product. We will first review a quick tour of system engineering, and then go on to the motion control specifics.

Posted in: Features, Articles

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Reducing Design Time for Linear Motion Systems

Design time can be reduced while ensuring durability and high performance. Reducing design time is critical in engineering because the result is lower costs and faster time to market. Design time often includes a number of non-value-added activities such as re-design, over-design, or scope creep that can be minimized by thoroughly understanding all of the application criteria and verifying calculations and analysis via parametric testing of components, modules, and full assemblies with data acquisition equipment, and proving out projected performance results with testing.

Posted in: Features, Articles

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Wireless Foot Switch Design Considerations

Key selection factors for OEMs to consider include wireless protocol selection, battery selection, operating-voltage and space constraints, and wireless receiver location. Wireless foot switches for the control of medical devices are gaining acceptance and growing in popularity — prompting OEMs to design medical equipment for use with a wireless foot switch or to accept a wireless foot switch as a pre-sale or post-sale option.

Posted in: Bio-Medical, Briefs, Briefs

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Electronic Flow Control Valve (EFCV) with Pressure Compensation Capability

Flow control is one of the most critical functions in the hydraulic industry. Traditionally, flow control is implemented via a proportional or servo valve. When current is applied into the coil of a solenoid (proportional valve) or a torque motor (servo valve), a corresponding electromagnetic force is generated. These forces could either directly stroke the spool (single-stage configuration) or indirectly move the main stage spool via regulating the hydraulic pressures on each end of the main stage spool (multiple-stage configuration).

Posted in: Features, Articles

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