Motion Control

Z-Theta System

Catalyst Motion Group™, a Haydon Kerk Motion System integrator (Waterbury, CT), offers a Z-Theta system capability that provides a compact package to achieve a rotary axis and a linear axis in a single unit. When operated in coordinated motion, the system can effectively create a helical motion path. The Kerk brand ScrewRail® is the centerpiece of the system, with the linear and rotary power being supplied by Haydon and Pittman motor technology. Z-Theta systems are used for picker-type applications in automated kiosks, data storage libraries, and other repetitive motion tasks requiring both a linear and a rotary move. Loads of up to 100 pounds and speeds in excess of 10 inches/second are possible. For Free Info Visit http://info.hotims.com/61058-309

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Motion Controller

Soft Servo Systems (Waltham, MA) offers the WMX general motion controller that simultaneously controls up to 64 axes and 64 channels with control functions on the EtherCAT platform. It can run as an EtherCAT master on a commercially available PC with a LAN (Ethernet) port and no specialized interface board. Compatible with Windows 7, the PC-based system includes the original EtherCAT Master stack with EtherCAT functionalities including DC Sync and Hot Connect. It also includes a license of RTX, the Windows real-time extension tool. The controller allows for development of an original motion controller with a Windows Class Library that supports up to 256 threads and includes over 500 API functions, including EtherCAT network management. For Free Info Visit http://info.hotims.com/61058-307

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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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