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Southern Spars, a New Zealand-based company specialising in the design and construction of spars and rigging for high-performance yachts, has recently become the 35,000th customer to purchase its Delcams CADCAM software.
Southern Spars has acquired Delcams PowerMILL CAM system to program robots for the finish machining of spars and other components manufactured from carbon fibre-reinforced composites.
Southern Spars built its first carbon-fibre reinforced composite spar in 1990. Since then, the company has pursued a passion for delivering cruising and racing spars, rigging and related components made from composites. Its customers include the holders of more than 25 world sailing records, and the owners of some of the largest and most expensive yachts ever built. Southern Spars operations now extend to the four corners of the world with centres in the USA, Europe, Asia and South Africa, in addition to its headquarters in Auckland, New Zealand.
The decision to invest in the Delcam software was made by Stephen Young, a design engineer at Southern Spars with responsibility for the companys CADCAM operations in New Zealand. He had read about the possibility of using robots to machine larger components and felt that this approach could replace the manual methods being used for finishing of the companys composite parts.
His initial investigation proved extremely frustrating. We approached a number of suppliers that claimed to offer systems to program robots, Mr Young remembered. However, most of the people we talked to did not actually have any real-world experience. Delcam was the only company that could show us some genuine applications with the technology.
Ease of programming was a key requirement for Southern Spars. All of the programming is carried out by the design office in New Zealand, plus it needed to be carried out offline as early as possible in the design process, explained Mr. Young. This meant that the software had to be instinctive and easy to learn. In addition, since practically every part we make has to be custom designed, the programming time had to be kept to a minimum.
Delcam say that savings from using robot machining in place of the traditional manual processes are in the range of 70 to 80%. The next stage in the development is to place the robot onto rails so that even Southern Spars biggest components, including a 78 metre mast for a super-yacht, can be machined in a maximum of two sections.
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