60 Chapter 3 Welder Operation Description
Ehave Series Full Digital IGBT CO
2
/MAG/MMA Multifunctional Inverter Welder User Manual
Equivalent circuit
within the welder
I/O signal
for the robot
Figure 3-43 Equivalent circuit for I/O signal transmission from the welder to the robot
Note 4: The relationship between the welding current signal value Vcurr provided by the welder to the robot and the
welder's actual welding current value Ireal is Vcurr = Ireal/75. See Figure 3-44. That is, when the actual current is
300 A, the welding current signal value is 4 V.
Figure 3-44 Relationship between Vcurr and Ireal
Note 5: The relationship between the preset voltage signal value Vav provided by the robot to the welder and the
welder's actual preset voltage value Vref is Vav = 0.303 Vref - 3.636. See Figure 3-45. That is, when the actual
preset voltage is 30 V, the preset voltage signal value is 5.455 V.
Figure 3-45 Relationship between Vav and Vref
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