Linear encoders used in automatic saw application

Newall Measurement Systems is supplying its SHG-TT incremental linear encoders to Stimir for use on the company's innovative automatic stub saw and MIG welding systems for aluminium smelters

Stimir, an Icelandic supplier of plant and machinery to the primary aluminium industry, is using SHG-TT incremental linear encoders from Newall Measurement Systems in groundbreaking automatic stub saw and MIG welding systems for leading aluminium smelters. The machines, four of which have been installed and commissioned, require precise positioning capabilities from its encoders, TTL output and high levels of contamination protection.

Used in anode rodding plants, Stimir's innovative automated stub saw machines use bandsaw technology, resulting in energy conservation, noise reduction, cleaner cut surfaces and easy and inexpensive blade replacement. The saw cuts stubs horizontally while the rod remains hanging in the overhead conveyor.

The latest installation at Balco in India is the first stub repair installation in the new pre-bake smelter and is energy-efficient and quiet. The smooth and precise cut surfaces generated by the Stimir saw enable much improved control of welding, producing mechanically stronger joints with significantly lower electrical resistance. The system control specified by Balco enables the selection of any of three cut lengths on any combination of the four stubs on each anode rod. After cutting, the rod moves on the overhead conveyor to an automatic MIG welding station where the correct length of new stub is fitted and welded in place. This is the fourth recent shipment for Stimir's automatic stub saw and follows orders from Alcan Iceland, Alcan Steg of Switzerland and Soeral in Norway.

High-quality, reliable components

Stimir's technical director Ingi Rutsson says: "Less-than-perfect fabrication and assembly can render even the best design useless. At Stimir we put extra effort into the mechanical and electrical assembly of our products, using experienced staff and high-quality, reliable components. The selection of the right linear encoder was crucial in the development of these machines. Positioning of the saw to reflect correct removal of the damaged stub is essential, as is welding head positioning. Furthermore, the operating environment for these machines is far from clean, so protection from the ingress of contamination is a significant factor."

Newall's SHG-TT incremental encoder is capable of achieving high accuracy and provides a differential quadrature output at RS422 TTL levels. Importantly it is sealed to IP67 and is resistant to severe shock, vibration and RFI, making it well suited to Stimir's requirement. The SHG can deliver real-time feedback at traverse speeds of up to 20m/s. A comprehensive measuring length range is offered giving travels ranging from 0.50-11m for a single scale, with modular versions available in excess of 30m.

Mr Rutsson comments: "We considered a number of encoders but it was clear Newall's SHG-TT most closely matched our needs. It is rugged in construction, easy to mount and available on short delivery."

This was Newall's first OEM account in Iceland and continues the trend of global penetration into new markets worldwide with its range of linear encoders and digital readout systems.

About Stimir

Stimir was established in 1995 by former employees of the Icelandic Aluminium Company (ISAL), now a part of the Alcan group. Stimir's founders originate from a number of departments at ISAL and have brought to Stimir a valuable insight and understanding of the needs and demands of its customers in the aluminium industry. Located at Hafnarfjördur, south of the capital Reykjavik, the company is taking advantage of the country's growing aluminium sector. As part of a $50million-turnover, 280-employee group, the company still obtains 70 per cent of its revenue from the Icelandic market.

Newall Measurement Systems Ltd

Cornwall Road
South Wigston
LE18 4XH

+44 (0)116 264 2730

More applications
1 day ago
NSK bearings reduce concrete floor manufacturing machine failures to zero
Regular bearing failures in a concrete floor manufacturing machine were leading to extensive downtime, costly lost production, and high maintenance costs. To rectify the problem, the customer turned to the expertise of NSK for a redesigned wheel hub and stub axle assembly.
4 days ago
Servodrives help protect chair castors and cut packaging costs
Drives and motors specialist Yaskawa has played a key role in the development of an automated system specifically designed to fit protective plastic caps onto chair castors, using its Sigma-7 series servo-drives and a SLIO-series controller.
6 days ago
SKF streamlines bearing analysis for Ansys users
With the new SKF Bearing App for Ansys Mechanical, design engineers have instant access to accurate stiffness data on more than 10,000 bearing designations. The app is available in the Ansys Store free of charge.
6 days ago
Omron awarded platinum rating from EcoVadis for sustainability
Omron has been awarded the Platinum rating following a sustainability assessment by EcoVadis. A score earning a Platinum rating, which is the highest distinction, puts the company within the top 1% of all the businesses assessed for sustainability performance.
1 week ago
ABB Value Provider wins order for rolling mill DC drive solution
DC drive specialist Iconsys is set to deliver a bespoke drive upgrade solution comprising two 12-pulse drive suites from ABB for a UK steel mill’s payoff and tension reels, used to feed and recoil steel strip through a production line.
1 week ago
What are the design considerations when specifying lead screws?
The first in the new ‘Design • Engineer • Build’ series of video podcasts focuses on lead screws – components that are at the heart of countless engineering systems. We talk to Phil Jones at Abssac about the enduring popularity of these essential design products, and the design considerations in their specification.
1 week ago
Harting honoured with the ‘Best of Industry Award’
The industry media of the Vogel Communications Group presented their ‘Best of Industry Awards’ shortly before the turn of the year. The Harting Technology Group emerged as the winner in the ‘Electrical Equipment’ category with its Han-Modular Domino modules.
1 week ago
Quick ROI and 60% decrease in maintenance travel with remote access
Brazilian surface treatment systems manufacturer Erzinger was keen to limit service trips as much as possible to serve customers faster. By implementing IXON Cloud, it can now support its customers remotely, and work in an intuitive and secure way. It can even set up multiple simultaneous connections to work together on the same project. The result is cost reduction, quick ROI and happier customers.
2 weeks ago
Nord high up in the sustainability ranking
Nord Drivesystems was assessed by the rating agency EcoVadis and awarded the silver sustainability certificate in 2022. In the overall ranking, the North German company is in the top six percent of manufacturers in the industry assessed by EcoVadis.
2 weeks ago
Mitsubishi Electric helps door manufacturer triple its throughput
Renowned door manufacturer Profile Developments has seen a threefold increase in its productivity, thanks to its latest collaboration with Mitsubishi Electric, with a solution based on multiple FR-E series inverter or variable speed drives (VSDs) and other system-matched components, such as a GOT 2000 series HMI and MELSEC iQ-R PLC.

Login / Sign up