Optical UHV encoder

IMTS 2012: Resolute UHV from Renishaw are ultra-high vacuums that offer true-absolute position feedback and sub-micron accuracy for semiconductor and scientific applications that require vacuum compatibility.

07/11/2012


Resolute UHV from Renishaw are ultra-high vacuums that offer true-absolute position feedback and sub-micron accuracy for semiconductor and scientific applications that require vacuum compatibility. Courtesy: RenishawResolute UHV is an ultra-high vacuum compatible readhead from Renishaw, offering true-absolute position feedback, sub-micron accuracy and resolutions to 1 nm for both linear and rotary applications. Renishaw said this is the world's first true-absolute optical UHV encoder. The new range of Resolute UHV encoders are constructed from clean vacuum-compatible materials and adhesives to give low outgassing rates and proven clean residual gas analysis (RGA), making them suitable for high performance, semiconductor and scientific applications requiring vacuum compatibility to 10-10 Torr.

The ultra-high vacuum variant determines position immediately upon switch-on, without the need for any movement or battery backup. Instant commutation means axes are immediately under control after power loss. This eliminates risks of unchecked movements or collisions, an advantage that is essential in applications such as wafer handling, where safe extraction of high-value wafers is critical.

Safety is assured via a built-in, independent position-checking algorithm that actively checks every reading, ensuring any potential problem is flagged before it reaches the controller. Resolute UHV uses pure serial communications with CRC (cyclic redundancy check), which eliminates the need for auxiliary 1 Vpp signals, offers higher noise immunity and detects data corruption. Resolute UHV is compatible with industry standard controllers.

All UHV encoders are supplied with an RFI-screened, UHV compatible cable. They are manufactured in clean conditions and shipped in specially designed packages to avoid contamination.

Resolute UHV systems are available for linear and rotary position feedback, and because the Resolute system uses a single-track scale code, each installation is compact with wide set-up tolerances for quick, easy fitment and long-term operation. All scale formats are coating-free and can be subjected to specialist cleaning and degreasing, if required.

Designers can choose from a variety of linear scales in either stainless steel or ZeroMet low thermal expansion alloy, with accuracy to better than ±1 µm on lengths up to 1.13 m. Mounting can be either self-adhesive, mechanical or track-mounted. The self-adhesive scales also have proven clean RGA spectra. Stainless steel rotary rings feature large through-holes and patented taper mounting for quick, easy and precise adjustment of eccentricity, while minimizing shaft preparation costs.

Renishaw Inc.

www.renishaw.com 

Renishaw will exhibit at IMTS 2012 in E-5530 and N-650. www.imts.org 

- Edited by Chris Vavra, Control Engineering, www.controleng.com 



No comments
The Top Plant program honors outstanding manufacturing facilities in North America. View the 2015 Top Plant.
The Product of the Year program recognizes products newly released in the manufacturing industries.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
2017 Lubrication Guide; Software tools; Microgrids and energy strategies; Use robots effectively
Prescriptive maintenance; Hannover Messe 2017 recap; Reduce welding errors
Safety standards and electrical test instruments; Product of the Year winners; Easy and safe electrical design
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
Diagnostic functions for system safety; Specifying industrial enclosures; Effective decision support for a crisis
Transformers; Electrical system design; Selecting and sizing transformers; Grounded and ungrounded system design, Paralleling generator systems
Natural gas for tomorrow's fleets; Colleges and universities moving to CHP; Power and steam and frozen foods

Annual Salary Survey

Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.

There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.

But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.

Read more: 2015 Salary Survey

Maintenance and reliability tips and best practices from the maintenance and reliability coaches at Allied Reliability Group.
The One Voice for Manufacturing blog reports on federal public policy issues impacting the manufacturing sector. One Voice is a joint effort by the National Tooling and Machining...
The Society for Maintenance and Reliability Professionals an organization devoted...
Join this ongoing discussion of machine guarding topics, including solutions assessments, regulatory compliance, gap analysis...
IMS Research, recently acquired by IHS Inc., is a leading independent supplier of market research and consultancy to the global electronics industry.
Maintenance is not optional in manufacturing. It’s a profit center, driving productivity and uptime while reducing overall repair costs.
The Lachance on CMMS blog is about current maintenance topics. Blogger Paul Lachance is president and chief technology officer for Smartware Group.
The maintenance journey has been a long, slow trek for most manufacturers and has gone from preventive maintenance to predictive maintenance.
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.
Maintenance Manager; California Oils Corp.
Associate, Electrical Engineering; Wood Harbinger
Control Systems Engineer; Robert Bosch Corp.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
click me