Motion Control

Rail Brakes

Profile Guide rail brakes from Nexen Group (Vadnais Heights, MN) are available in a range of sizes from 15 to 45, and provide engagement at 0.049 to 0.080 seconds. They provide static holding force to 2,600 N (585 lbs.), and can be combined to provide higher holding forces. The brake is suited for holding a load in position while failed reducers or motors are replaced. They also allow for the use of smaller drive systems because the brakes position and hold a load that might otherwise overpower the drive system. The brakes clamp onto the center of profile guide rails to provide positive braking and holding in all axes without touching the bearing surface of the rail. For Free Info Visit http://info.hotims.com/61058-316

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Slide System

Velmex (Bloomfield, NY) offers the Parallel-Coupled BiSlide System for long traverses and larger loads. The system features two identical BiSlide assemblies coupled with a timing belt to drive synchronous operation. It can handle loads to 600 pounds and is available in standard lengths up to 80 inches. The assembly is available in both manual and motor-driven models. The motorized models feature a double shaft motor on one slide and a heavy-duty bearing assembly on the other slide. The manually operated versions have the bearing assembly on both slides.

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Positioning Stage

LinTech (Monrovia, CA) offers the 610 series totally enclosed positioning stage in stroke lengths from 6 to 60 inches (150 to 1520 mm). The screwdriven linear positioning systems use a low-friction, preloaded, recirculating linear ball bearing system that rides on precision ground linear rail guides. The linear rails are mounted to an extruded aluminum base, which provides support over the entire travel of the table’s carriage. The load is mounted to a machined aluminum carriage, which has threaded stainless steel inserts. There are 38 different acme and ball screw options. For Free Info Visit http://info.hotims.com/61058-310

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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.

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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).

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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).

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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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