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DryLin® E7 plastic linear plain bearings versus PTFE-lined plain bearings

Linear plain bearings are becoming commonplace in today’s manufacturing industry. As technologies and material sciences have advanced, so have the capabilities of linear plain bearings, particularly those made of plastic, such as the DryLin® series of self-lubricating linear bearings from igus®. This whitepaper will compare how they outperform a competitive linear plain bearing technology, which uses a PTFE-based, bonded liner, in both wear and friction testing.

Posted in: White Papers

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Choosing the Right Potentiometer for Reliable Sensing

In today’s market, there are a variety of available types of position sensing systems. It is important to compare unique features to application needs in order to find the best fit. A potentiometer sensor is an electromechanical component that consists of a resistor where the voltage divider value can be measured at any position by means of sliding contacts between the applied voltage values. Physically, a potentiometer consists, at a minimum, of a resistance track, a collector track, and a sliding contact that can be moved along the resistance track by means of mechanics (Figure 1). The movement of the sliding contact can be rotatory (angle) or translational (path).

Posted in: Articles

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Embedded Virtualization Enables Highly Integrated “Soft Motion” Platforms on the PC

With the increased processing power that PCs have attained, a complex machine that used to require an expensive and dedicated hardware-based motion control solution can now be accomplished on a multicore PC running on a real-time operating system (RTOS).

Posted in: Application Briefs

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Sense Element Pump Ripple Fatigue

Aerospace sensor technology is plagued by the balance between sensitivity and durability. As devices become more fragile in the pursuit of achieving higher accuracy they find themselves torn apart in the process. Hydra-Electric solves this using a special sense element of stainless steel construction capable of withstanding the harshest pressure spike environments without the use of a snubber. Using finite element analysis, it was revealed that near infinite fatigue life is achieved even in high pressure applications. This demonstrates the superiority of a stainless steel flexure sense element over conventional piezoresistive silicon (PRT).

Posted in: White Papers, Data Acquisition, Sensors

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Nonlinear Model Predictive Control

This whitepaper presents an automatic workflow for implementing Model Predictive Control (MPC) controllers. The process uses MapleSim to generate a model of the system, whose dynamic equations are then extracted using Maple. Next, Maple is used to formulate the MPC problem, and generate the solver, which it automatically converts into the C code of the MPC controller. The advantage of using Maple is that the required procedures and their corresponding derivatives are computed and optimized whenever there is a change in the dynamic equations. The use of Maple saves time, removes human error, and produces highly optimized controller code.

Posted in: White Papers

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Drives

NORD Gear Corp. (Waunakee, WI) offers the SK 180E drives for applications that do not utilize the scope of functionality found in frequency inverters. The drives focus on the functionality necessary for pumps and conveyor technology. They offer a continuous range of performance and optional features for a variety of applications. The series includes three digital inputs, two digital outputs, two analog inputs, an integrated 24V power supply, input power range of 115V single phase to 480V threephase operation, 0.33 to 3.0 HP, AS interface onboard, and operating software for controlling, programming, and diagnosis. For Free Info Visit http://info.hotims.com/55594-306

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Brushless DC Motors

PITTMAN® Motors, a business unit of AMETEK Precision Motion Control (Harleysville, PA), introduced the EC042B brushless DC motor series. The high-torque-density model is designed as a general-purpose servomotor. Its NEMA 17 mounting configuration is adaptable to most metric mounting requirements. The motors are available in three motor lengths with a continuous torque range of 11 Ncm – 31 Ncm, and a peak torque range of 35 Ncm – 99 Ncm. It has a maximum speed of 9,000 rpm and can be used with DC bus voltages up to 96V. There are eight standard winding variations, with custom windings available. The motor construction features a 4-pole rotor with rare earth magnets for high torque-to-inertia ratio. The stator assembly is designed with low-loss materials for higher-speed applications. The motor shaft is supported by shielded ball bearings that are preloaded. The motors are available with optional planetary gearboxes and optical incremental encoders with line counts up to 2,048, three channels, and line driver. For Free Info Visit http://info.hotims.com/55594-305

Posted in: Products

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