Weld334m - User’s manual
3
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High magnetic fields, generating very close to the welding gun and the secondary
cable, represent a serious hazard to people and property (e.g.: watches, cables for
electric data transmission, magnetic devices, medical equipment and pace-makers).
•
Welding is obtained through the periodical repetition of high single-phase, short-time
and low cosphi current pulses. These conditions of use may cause disturbances to the
power lines of the production plant and may be hazardous for other types of
operating machines or machine tools.
•
Outputs of the welding control device solenoid valves are all protected by a series-
connected contact of the cycle start relay. This to prevent any faults or disturbances
of the electronic outputs from causing undesired controls. (The Start cycle function is
equipped with a time-dependant consent control at the plants and countries
demanding for it).
•
In cases where local safety regulations require or prescribe such as for machine start
– for instance: two-hand cycle start controls with check of simultaneous operation –
these devices shall have to be implemented when installing the system.
•
Outputs for the pre-stroke solenoid valves controlling the additional gun opening,
feature direct control as well as the output for the proportional solenoid valve.
•
These two outputs do not cause any movement nor do they operate the gun to close
fully.
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