Cloos NexT 452 AC, Operating Instructions Manual

Page: 122 / 234

122
Operation
4.1.2 Operating mode 4-cycle
Operating mode 4-cycle is provided for longer manual welds.
1st cycle --> Press and hold 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 speed
2nd cycle --> Release torch trigger
• The start program is executed with the adjusted parameters and then
switches via a programmable time function ("Upslope") to the main
program.
3rd cycle --> Press and hold torch trigger
• Change from main program to the end program via a time function
("Downslope").
4th cycle --> Release torch trigger
• Wire drive unit stops
• Weld voltage switches off after expiration of the "burnback time"
• Arc extinguishes
• Solenoid valve closes after expiration of the "gas post-flow time"
Torch
Keystroke
Welding
time
Start time:
1 sec
Gas pre-flow +
inching in Wire bu
gas post-flow
End crater filling time:
3 sec
Upslope
3 sec Downslope
2 sec
Main power
3 s 1 s
2 s 3 s