Cloos NexT 452 AC, Operating Instructions Manual

Page: 39 / 234

39
3. MAIN - Operating modes
The welding power source provides the following operating modes:
• 2-cycle
• 4-cycle
• Super-4-cycle
• Spot welding/Interval
• External
3.1 2-cycle
Operating mode 2-cycle is provided for short manual welds.
1st cycle --> Press torch trigger
• Solenoid valve for shielding gas opens
• Welding voltage is applied on wire electrode
• Wire drive unit starts with reduced speed (inching-in)
• Arc ignites, welding current flows
• Wire drive unit switches to the preset wire speed
2nd cycle --> Release torch trigger
• Wire drive unit stops
• Welding voltage is switched off after expiration of the "burnback time"
• Arc extinguishes
• Solenoid valve closes after expiration of the "gas post-flow time"
3.2 4-cycle
Operating mode 4-cycle is provided for longer manual welds.
1st cycle --> Press torch trigger
• Solenoid valve for shielding gas opens
• Welding voltage is applied on wire electrode
• Wire drive unit starts with reduced speed (inching-in)
• Arc ignites, welding current flows
• Wire drive unit switches to the preset wire speed
2nd cycle --> Release torch trigger
• Execution of start program and upslope, if required
• Welding process continues with the adjusted main parameters
3rd cycle --> Press torch trigger again
• Downslope and end crater program, if required
4th cycle --> Release torch trigger again
• Wire drive unit stops
• Welding voltage is switched off after expiration of the "burnback time"
• Arc extinguishes
• Solenoid valve closes after expiration of the "gas post-flow time"