EoW November 2007

Cutting &Welding

Unique technical specifications from GEM

Marta System is a CNC integrated resistance welding cell, manufactured by the Italian company GEM. This equipment provides unique technical specifications and, for the first time, joins together the advanced technologies of the electric drive of all the welding heads, replacing the traditional pneumatic cylinders, and medium frequency transformers. The machine frame consists of two linear axes, with a C welding gun fitted with one upper and one lower electrode. The maximum working range is 2,300 x 1,250mm – but larger working ranges are available to meet customer specifications. Both welding heads are fully CNC controlled. They can rotate at 360° around their own axis, and slide vertically. On the side of the big gun, a smaller scissor gun is fitted with three axes. Even the arms are servo-operated.

The Marta System from GEM

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The two stations turntable is of the electrical-mechanic cam type, ensuring high repeatability and reliability. The steel linear slides are of the re-circulating ball type, while the system drive is provided by high efficiency brushless motor (Siemens), coupled with gear boxes and re-circulating ballscrews. All the slides are protected by suitable dust and spray proof bellows. The machine is fitted with a constant current welding control, with storage of up to 15 different welding programs. Each program can be automatically recalled by the part-program. The programming is made by self-teaching, through an ergonomic terminal, while the cabinet, turntable, guarding, and access door with interlocked switch, are integrated in the frame, so that the machine can be easily loaded/unloaded, reducing the installation and commissioning time. The loading area is protected by a double photoelectric cell barrier. Marta System’s 9 AX gun is especially suitable for assembling of wire and steel products in 2 and 3 dimensions. GEM Srl – Italy Fax : +39 011 9241002 The CNC, with integrated PLC, is located in the cabinet.

Email : rovera@gemwelding.com Website : www.gemwelding.com

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EuroWire – November 2007