Miller Electric Welder Touch Sensor Operation, Touch Sensor Board PC18 Switch S1 Settings, Front

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

Y WARNING: One of S1 switches must be ON and the other must be OFF.

Top View

1

1Touch Sensor Board PC18

2Switch S1

When S1 switch 1 is On, output is +24 volts dc (factory default).

When S1 switch 2 is On, output is common.

2

Front 212 321-A

OM-196 188 Page 18