20kVA Column Spot Welder Pneumatic 700mm Arms

• Synchronous thyristor drive with phase-shift control for welding current adjustment.
• Built in ammeter (RMS value), 2 selectable ranges (18-56 kA).
• Storing of 99 welding programs.
• Inputs for external selection of 31 programs or 15 programs with parity control.
• Welding times adjustment in half-periods.
• Pre-weld, slope and pulse functions.
• Welding current control limits. Error condition signaling output and function to stop welder operation.
• Single and repeat operating mode. WELD/NO WELD function.
• Welding current compensation function to assist welding of oxidised sheets and rods.
• Possibility to connect two independent start of cycle device using different welding programs.
• Auto retain disabling for manually actuated welders.
• First phase shift delay adjustment. It enables the machine line current best balance.
• Cos φ adjustment, allow to optimise current adjustment linearity.
• End of cycle output for automation applications.
• Thermostatic protection input.
• Self-adjustment to the mains frequency 50/60 Hz.
• Control of solenoid valve 24 Vdc 7,2 W max with short circuit protection.
• Optional insulated RS 232 interface. Allow the connection with a printer or a personal computer for production data recording.

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