Linear Motion Tips » linear stages

Linear Positioning Stages Feature Moving Magnet Voice Coil Technology

admin — Fri, 22 Oct 2010 19:12:59 +0000

Linear Positioning Stages featuring moving magnet voice coil technology from H2W Technologies offer high resolution (from 50 nanometers), zero cogging, high speed, high acceleration (to 5 g’s), high repeatability, and long life. The compact linear positioning stages can be mounted horizontally or vertically and are suitable for short stroke positioning applications requiring high acceleration, high accuracy, repeatability, and high reliability.

This compact (4.0 in. L x 3.5 in. W x 3.52 in. H), light weight anodized aluminum, moving magnet voice coil linear positioning stage features a stroke length of +/- 0.11 in. from the center of travel home position, and has a payload to 2 lbs. For greater reliability there are no moving cables or wires as the coil assembly and linear encoder head are stationary.

These moving magnet voice coil linear positioning stages can be supplied with a variety of amplifiers and controllers to provide plug-and-play solutions for easy integration into new and existing applications. Other options include: Optical or magnetic linear encoder; ball bearing, cross roller, or air bearing slide; different stroke lengths; higher payloads. Custom designs can be quickly supplied.

H2W Technologies
www.h2wtech.com

Linear Motion Tips

Integrated 3-Axis Micro-manipulator from Steinmeyer

Miles Budimir — Thu, 13 Aug 2009 14:18:22 +0000

Burlington, MA – Steinmeyer, Inc. introduces the MP63 3-axis micro-manipulator module. The MP63 is a fully enclosed 3-axis positioner with 25mm stroke in each direction. Included inside the compact precision assembly are DC gearmotors, rotary encoders, lead screws, and non-contact limit switches.

Accuracy in each direction is 5 microns with ± 1 micron repeatability and standard straightness and flatness is ± 3 microns with 1 micron available as an option. The entire assembly weighs only about 2kg. Cable connectors are located on one end for convenience and simplicity and as an option, the assembly can also be made clean room compatible.

For more information on the MP63 or other products, contact Steinmeyer at 1-781-273-6220 or visit the Steinmeyer group web site at www.steinmeyer.com.

Linear Motion Tips

MMG Mini-Mag Precision Linear Motor Stages

admin — Tue, 28 Jul 2009 17:18:48 +0000

SALEM, NH – Dover introduces the MMG Mini-Mag line of precision linear motor stages. Mini-Mag Stages deliver nearly twice the accuracy at virtually the same cost as competitive standard-grade options. Lead times of two weeks or less facilitate reduced-time-to-market with a higher performing machine for OEMs, or provide greater machine uptime for end users in production environments. The ability to deliver MMG prototypes rapidly speeds the proof-of-concept phase of an instrument under development.

Four models are available that deliver 25mm, 50mm 100mm and 150mm travel, respectively. They provide uncompensated accuracy ranging from 2um to 8um and resolution ranging from 1.0um to 5nm. Each model delivers repeatability to ±0.4um and is rated for 8kg load capacity.

One of the most significant features is an Integral anti-creep linear guideway, which can increase uptime by as much as 15% in high duty cycle applications by eliminating the need for homing moves typically required to reset standard crossed roller bearing retainer cages. These stages also feature adjustable limits to reduce the time needed to make adjustments to stage travel, thus reducing prototype development time and system startup costs by up to 10%.

An integrated advanced feedback mechanism enables exceptional uncompensated accuracy. This encoder eliminates the need for compensation tables or slope correction factors, thus lowering software and integration complexity and implementation time. A standard “Z” axis counterbalance kit eliminates the typical engineering required to integrate a “Z” option, thus reducing the implementation time of a “Z” axis stage.

MMG stages leverage a standard 3-phase brushless motor to enable control with various OTS drives and controllers, and deliver up to 20% greater throughout compared with piezo-driven actuators. No specialized piezo or proprietary motor/drive technology is necessary.

The MMG stage can be used in constant velocity (CV) or high throughput point-to-point applications, allowing common units to be used. For OEMs, this lowers Bill-of-Material (BOM) costs while reducing and simplifying their unique parts count. Their precise performance, short lead times and lower cost of ownership make them ideally suited for use in life science and clinical diagnostic instruments. They are also well suited for use in OEM Metrology applications and photonics/laser machining applications.

Dover
www.dovermotion.com

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