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3-11. Touch Sensor Operation
The touch sensor feature allows the robot to locate a weldment using the wire feed system and welding power source.
Voltage sense leads provide a path for touch sensor voltage when this feature is turned on at the peripheral receptacle.
Turning on touch sensor causes a dc voltage to be present on the welding wire. When welding wire touches the
weldment, the voltage sensing circuit closes, and a +24 volts dc output signal is sent to the robot control indicating
weldment detection. Touch sensor dc voltage on the welding wire will vary from 60 to 150 volts dc depending on the
welding power source. As soon as touch sensor turns on, DANGER SENSOR ON appears on the front panel display.
3-12. Touch Sensor Board PC18 Switch S1 Settings
212 321-A
1 Touch Sensor Board PC18
2 Switch S1
When S1 switch 1 is On, output is
+24 volts dc (factory default).
When S1 switch 2 is On, output is
common.
2
Top View
Front
1
Y WARNING: One of S1 switches must be ON and
the other must be OFF.