Tweco 400 MSTP Arcmaster - Manual (Page 43)

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welding. As with conventional MIG welding, the power source must be adjusted to correspond with
the correct heat input for a given wire feed speed setting.
8. For REMOTE control make sure the REMOTE light on by pressing the REMOTE button if necessary.
Now the arc voltage can be controlled at the wire feeder (if the feeder is equipped with a voltage
control). See Step 6 for an explanation of how to set the output of the power source. If the wire feeder
is equipped with a digital meter, it will also display the preset “reference number”; however it will
show a decimal point. For example, if the wire feeder displays 23.5 the power source will display 235.
9. The power source is now ready to weld. To initiate the weld, activate the torch switch on the MIG
torch.
10. To end the weld, release the torch switch. As with conventional MIG welding, a wire conditioning
sequence will leave the wire with a very small ball on the end, thus making the next arc strike easier.
Optional Programming Pendant
AN optional programming pendant allows any or all eight of the factory pulse schedules to be overridden.
To use the pendant, turn the power source OFF, and plug the pendant into the pendant plug on the rear of
the power source. Then turn the power source back ON. To work properly, the pendant must only be
plugged into the power source with the power source turned off.
1. Select the PULSED MIG mode on the front panel.
2. Keeps pushing the LOAD buttons and then use the Control knob to select one of the eight schedules.
The schedule number will appear on the pendant.
3. Select the parameter to be adjusted on the pendant. The parameters are Ist, Ipk, Tpk and Vbak.
4. Use the increase and decrease buttons (or the control knob of the pendant) to adjust the value.
NOTE: It is not the intent of this manual to try to describe how to arrive at the correct values for a
“good” schedule. This manual just provides the procedure.
5. Select the next parameter to be changed.
6. After all parameter have been changed, press the SAVE button on the pendant. This will
“permanently” save the new date into the memory on the power source. The new date can still be
over-ridden with the programming pendant.
7. To restore the factory setting for the selected schedule, press the RESET button on the pendant.