The FOOT PEDAL is able to control the welding current in all the machine functions
(TIG DC, TIG AC and MMA) except when the PULSE function is activated.
2T / 4T SWITCHING
In older designs of welding machine the 2T /4T switching functioned in the following
way:
2T OPERATION
With 2T operation the torch switch is PRESSED to start the welding and continued to
be HELD DOWN for the required duration of the welding process. When the switch is
released the arc current stops flowing and POST GAS starts.
4T OPERATION (OLD MACHINES)
In 4T operation the switch is PRESSED then RELEASED to START the arc current
the PRESSED and RELEASED again to STOP the arc current.
In the WSME 200 the action of the 2T switching is the same as the older machines
but 4T is quite different.
