A machine vision system is a group of components that can acquire an image on demand, and can be configured or programmed to perform extensive analysis of that image to extract useful data about the object being inspected. The image may be full color, but most applications work well with a gray-scale image, which may be processed more quickly and usually at higher resolution with respect to cost.
Machine vision systems interface with other automation components via discrete I/O signals, Ethernet, device net, serial and other communication schemes. For certain applications, a machine vision system can control the entire inspection process as a standalone operation without external communication. However, one true value of machine vision as a quality tool is its ability to collect and archive discrete and statistical data about a process, providing the quality engineer with information that can help improve a production process.
A common misconception surrounding machine vision is that it “takes a picture” of a good part and then compares subsequent part images to that picture. While this analysis technique is one capability of some systems, most machine vision image features are extracted by recognizing and processing individual geometric objects in an image. Some of the common algorithms that may be incorporated in an application include edge extraction, contrast measurement, blob analysis and pattern matching—although modern machine vision processors offer dozens of analysis and processing tools. These tools range from simple to complex, and are usually combined to form an inspection process suitable for the target application.
It is important to have a thorough understanding of how each tool works with an image and produces data in order to select the proper set of algorithms to achieve the desired inspection results. However, there is a much more critical aspect to machine vision implementation that impacts each and every application from specification to integration
Wednesday, August 06, 2008
Large CNC machine tool building
PTG adds the recently acquired brands to the current PTG machine tool portfolio that already includes Jones and Shipman and Holroyd.
PTG said that the new business will also add valuable re-manufacture facilities and expertise to the group.
PTG Group CEO, Mark Franckel said: I am delighted that we have acquired these historic British brands and see enormous benefits in the synergy they create within the group".
* About Crawford Swift - throughout its company history Crawford Swift has been committed to developing and manufacturing large machine tools.
The company has specialist expertise in the design and manufacture of new lathes, friction stir welding machines, acrylic polishing machines and other special purpose machine tools.
In addition to developing its own models, Crawford Swift is renowned for re-engineering, remanufacturing, repairing and servicing machines with a work piece capacity of up to 250 tonnes.
A good example of which is providing a world class service re-engineering roll grinders including Churchill, Farrel and Waldrich for the steel industry.
* About Binns and Berry - Binns and Berry specialises in the design, manufacture and repair of large capacity CNC lathes for components up to 15 tonnes.
Binns and Berry has a novel modular construction technique, which includes a three-/four-guideway bed design that allows the turning of large components in a single pass.
Other specialist turning machines include the following.
* Sliding gap bed lathes.
* Offset/T bed lathes.
* Deep-hole boring machines.
* Thread whirling machines.
Standard and full turnkey systems are available.
The company also provides re-engineering, rebuild and retrofit services for medium and heavy duty turning machines.
* Jones and Shipman benefits - existing Jones and Shipman customers will also benefit from this acquisition as they will have access to the knowledge and products of Crawford Swift and Binns and Berry.
The companies operate from a 38,000ft2 engineering works facility in Elland with one of the largest slideway planing and grinding machines in Europe which can machine 14.5m x 3.3m x 2.2m in a single set-up.
The works is serviced by heavy craneage up to 50 tonnes.
The setting up of Jones and Shipman Remanufacture means that customers can benefit from Jones and Shipman quality service when looking for expert repairs and solutions for existing large machines.
A service is even provided where specialist machines can be sourced from around the world, remanufactured and installed to match the exact needs of the client.
PTG said that the new business will also add valuable re-manufacture facilities and expertise to the group.
PTG Group CEO, Mark Franckel said: I am delighted that we have acquired these historic British brands and see enormous benefits in the synergy they create within the group".
* About Crawford Swift - throughout its company history Crawford Swift has been committed to developing and manufacturing large machine tools.
The company has specialist expertise in the design and manufacture of new lathes, friction stir welding machines, acrylic polishing machines and other special purpose machine tools.
In addition to developing its own models, Crawford Swift is renowned for re-engineering, remanufacturing, repairing and servicing machines with a work piece capacity of up to 250 tonnes.
A good example of which is providing a world class service re-engineering roll grinders including Churchill, Farrel and Waldrich for the steel industry.
* About Binns and Berry - Binns and Berry specialises in the design, manufacture and repair of large capacity CNC lathes for components up to 15 tonnes.
Binns and Berry has a novel modular construction technique, which includes a three-/four-guideway bed design that allows the turning of large components in a single pass.
Other specialist turning machines include the following.
* Sliding gap bed lathes.
* Offset/T bed lathes.
* Deep-hole boring machines.
* Thread whirling machines.
Standard and full turnkey systems are available.
The company also provides re-engineering, rebuild and retrofit services for medium and heavy duty turning machines.
* Jones and Shipman benefits - existing Jones and Shipman customers will also benefit from this acquisition as they will have access to the knowledge and products of Crawford Swift and Binns and Berry.
The companies operate from a 38,000ft2 engineering works facility in Elland with one of the largest slideway planing and grinding machines in Europe which can machine 14.5m x 3.3m x 2.2m in a single set-up.
The works is serviced by heavy craneage up to 50 tonnes.
The setting up of Jones and Shipman Remanufacture means that customers can benefit from Jones and Shipman quality service when looking for expert repairs and solutions for existing large machines.
A service is even provided where specialist machines can be sourced from around the world, remanufactured and installed to match the exact needs of the client.
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