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9.2
Input data I/O signals from robot controller to welding
equipment
Weld ON (Cable no 8)
The signal starts the welding process, but before the welding process starts the
quick stop and stop signals are checked to ensure that they are not active.
Quick stop (Cable no 13)
The signal stops the equipment if it is active in the welding process, it carries out a
normal stop without crater filling. The function is used when a quick stop (low signal
0V) is required but it gives a normal burnback time to prevent the wire sticking in the
weld pool. The signal also blocks the start command.
Wire inching (Cable no 10)
Used when one wants to feed wire without welding voltage.
The signal starts the wire feed without the welding voltage being activated. The wire
feed unit is ramping up the wire feed speed. If the signal is active during the welding
process, the command is ignored.
If both welding and wire inching are activated at the same time the equipment will
ignore the wire inching command and start the welding process.
Gas purge (Cable no 9)
Gas flushing is used when measuring the gas flow or to flush any air or moisture
from the gas hoses before welding starts. Gas flushing is carried out without voltage
or wire feed occurring.
Welding start always activates the gas valve even if the manual gas command is
given. In the same way the gas valve for gas post flow is always closed if it is not
closed already.
Gas flushing operates parallel to the gas pre-flow and gas post-flow functions. To
control the welding gas from the robot, set the gas pre-flow to minimum and the gas
post-flow to maximum, and then control the welding gas using the gas flushing
functions.
Air purge (Cable no 12)
The signal controls the valve for air cleaning welding spatter.
Touch sense (Cable no 15)
This command is used by the robot to sense where the wire is.
When the function is active, the power source will give out current limited, idle
voltage to see if the wire is in contact with the workpiece. On contact, the output
signal "Touch sense response" is activated.
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