As others have stated before, the Thermal Arc 185 TSW has to have a torch switch hooked up to use the sequencing features.
from the manual which is available for download at:
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Socket Pin Function1 Earth (Ground)
2 Torch Switch Input (24V) to energize weld current. (connect pins 2 & 3 to turn on welding current)
3 Torch Switch Input (0V) to energize weld current (connect pins 2 & 3 to turn on welding current)
4 Connect pin 4 to pin 8 to instruct machine that a remote current control device is connected (12V DC supply)
5 5k ohm (maximum) connection to 5k ohm remote control potentiometer
6 Zero ohm (minimum) connection to 5k ohm remote control potentiometer
7 Wiper arm connection to 5k ohm remote control potentiometer
8 Connect pin 4 to pin 8 to instruct machine that a remote current control device is connected (0V)
I would guess that the torch switch hooks up to pins 2 and 3, the same as the switch in the foot pedal, but without the pin 4 to 8 jumper which instructs the machine that a remote current control is connected. If this is true, you could also use the switch in the foot pedal to initiate sequencing if you disconnected the pin 4 to 8 junper.
Can anyone confirm or deny this?
Harold