Preflow ON and OFF Changeover Terminals
• A preflow timer (about 0.6 sec) is built in the control circuit. The Machine
comes with the Preflow set at OFF position.
• The preflow of the shielding gas can made be either ON or OFF by
changeover terminals on Printed Circuit Board.
FTT “ON” and “OFF” Changeover terminals
• FTT circuit is provided to stop the growth of globule at the end of the wire to
enhance the arc striking while restarting the welding. The FTT circuit can be
turned ON or OFF by the changeover terminal on Printed Circuit Board.
• FTT is set at ON as standard.
• Under special welding conditions where the welding is too frequently
repeated, a spark can occur if the FTT is “ON”, due to the end of the wire
touching the base metal immediately after welding (due to extended burn
back time limit). In such case, FTT is to be set at OFF.
I. ACTION
• When crater unit / self hold function is turned on:
1. When the pre-flow is turned ON, the welding voltage and wire feed action is
delayed by about 0.6 second.
The preflow is turned OFF, while supplied from the factory.
2. The dotted line portion indicates an action when FTT is OFF.
3. About 25 seconds after releasing the torch switch, the power saving circuit is
activated to turn off the electromagnetic contactor. Energy saving circuit is
incorporated in the unit.
9
To Next Page
Loading...
