EoW November 2007

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EuroWire – November 2007 60
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 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 CNC, with integrated PLC, is located in the cabinet.
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
Email:
Website:
The Marta System from GEM ▲