Motion Control

Block Spindle

Suhner Industrial Products Corp. Automation Division (Rome, GA) introduced the BEX8 high-speed machining block spindle capable of maintaining rigidity and precision at operations up to 25,000 rpm. The spindle weighs 33 lbs. and can be mounted directly onto robotic arms for fully automated machining operations in automotive, appliance, off-highway, and other industries. The standard motor supplied is either 0.37kW or 0.75kW, and the standard toolholder supplied is ER20.

Posted in: Products, Manufacturing & Prototyping, Motion Control
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Rotary Tables

Koma Precision (East Windsor, CT) offers Tsudakoma RDS Series direct drive rotary tables that use a proprietary direct drive motor system that enables the tables to achieve high speed and acceleration with no backlash. The compact, single-axis, 150-rpm tables feature indexing accuracy of ±10 arc seconds and a pneumatic braking system. Various options such as rotary joints, chucks, tailstocks, support spindles, and faceplates are available. The tables can be integrated with machine tools that have Fanuc or Mitsubishi controls. The tables also feature a low-profile build for mass production and high-speed indexing operations in the automotive, medical, and computer/electronic manufacturing industries.

Posted in: Products, Manufacturing & Prototyping, Motion Control
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Undermount Slide

Accuride (Santa Fe Springs, CA) announced the 3135EC Eclipse Undermount Easy- Close slide. The slide offers improved full extension movement with a 100-pound load rating and 4.8 pounds of pull force. The Easy-Close action brings drawers to a smooth close while reducing the total envelope of the product. Fluid dampeners resist slam without adding bounce-back. The slide can be configured with multiple drawer-front adjustment features, enabling horizontal, vertical, and front-to-back adjustment. A lower spacer clip with plastic ball bearings provides additional lateral support, reducing drawer sagging and side-to-side movement.

Posted in: Products, Manufacturing & Prototyping, Motion Control
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Pneumatic Gripper

Fabco-Air (Gainesville, FL) announced the FKHS Series 3 Jaw parallel motion pneumatic gripper for handling small parts in tight spaces. They are available in bore sizes of 25, 32, 40, 50, 63, and 80 mm. A magnetic piston is standard on all grippers. Mounting is via direct body (top and bottom) mounting holes.

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Positioning System

Piezoconcept (Lyon, France) offers the Hybrid System, an integrated positioning system for use with any standard inverted optical microscope. It combines a manual micrometer-driven, two-axis, linear motion stage with high-resolution, ultra-low-profile nanopositioners providing up to 300 μm in every direction. A stable blocking force into each axis of the coarse positioning stage provides a secure base for nanopositioning. The system provides sub-nanometer resolution under closed loop control. Typical applications include high-resolution microscopy, particle tracking, and confocal microscopy. Upon request, an additional breadboard can be provided.

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A Method for Accurate Load/Position Control of Rigidly Coupled Electromechanical Actuators

NASA has developed a technique designed to prevent cross-coupling in systems where two or more linear electro-mechanical actuators (EMA) are rigidly connected and are in danger of becoming cross-coupled. In such systems where the linked EMAs are commanded to achieve two distinct goals, such as position and load control, control problems often arise — especially at higher load and linear velocity levels. Both position and load control become inaccurate and in certain situations, stability of the overall system may be compromised. The NASA-developed approach mitigates the problem and achieves both accurate position following and desired load levels between the two (or more) actuators.

Posted in: Briefs, Mechanical Components, Mechanics, Positioning Equipment, Electronic control systems, Electronic equipment, Sensors and actuators, Electronic control systems, Electronic equipment, Sensors and actuators
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How to Prevent Step Losses with Stepper Motors

While stepper motors are an excellent solution for many applications, a key concern is step losses. However, in most instances step losses can be prevented or corrected. It is important to remember that a stepper motor does not operate like a DC motor. This white paper from MICROMO engineers provides guidance to determine step losses or non-operation across a variety of applications.

Posted in: White Papers, White Papers, Mechanical Components, Mechanics, Medical, Motion Control, Motors & Drives
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Simplified Machine Design Approach for Optimal Servomotor Control

An often asked question from industrial machine builders or integrators is how they can effectively design or implement the conversion of a machine with servo technology to meet performance expectations. This is a specialized task filled with layers of complexity that can prove difficult to execute, even when the scope of work is fully understood.

Posted in: Articles, Motion Control, Design processes, Sensors and actuators, Sensors and actuators, Industrial vehicles and equipment
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Anti-Creep Mechanism Enables Ultra-Precise Motor Table Positioning

Motion control is essential for the digitization and automation of high-tech equipment, but bearings remain basic to frictionless movement. Bearing Engineers, a bearing distributor, recently changed its name to Motion Solutions (Aliso Viejo, CA) to better reflect their evolution into a custom designer of motion solutions for high-tech electromechanical systems. Developing custom solutions has lead to developing lines of proprietary products that the company manufactures in-house.

Posted in: Application Briefs, Motion Control, Microelectricmechanical device, Microelectromechanical devices, Microelectricmechanical device, Microelectromechanical devices, Suppliers, Bearings
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Motor Drive

The RoadRunner SoftStep R213S microstepping motor drive from Testra Corp. (Tempe, AZ) features an onboard processor that treats the input steps as small vector moves, and chains them together with 250 or 256 microsteps per regular motor step with controlled accelerations. Dual chopper stabilized current comparators and auto-calibration eliminate communication discontinuities and maintain sine wave drive, reducing motor noise. The drives are equipped with jumpers installed with a divisor setting of 10 to make them Geckodrive compatible; jumpers can be reconfigured by the user. The drive microsteps in either 250 or 256 increments per step for DS (double-step) settings, 1 (full-step), 2 (half-step), 4, 8, 16, 32, 64, 128, and 256. The drive measures 2.5 × 2.5 × 0.825", input power is 20VDC – 80VDC, and current drive is 1 to 7 amps. Other features include resistor programmable current, opto-isolated inputs, and step frequency to 5 Mhz. Available options include custom waveforms to match individual motor characteristics, and user-programmable waveform.

For Free Info Visit http://info.hotims.com/61062-301

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