Tweco VAF4HD Transmig - Manual (Page 56)

TRANSMIG VAF4HD
INSTALLATION, OPERATION AND SETUP 3-38 Manual 0-5269
3.23 Prewelding Procedure
Follow all installation instructions for the wire feeder, the welding power source, and the welding gun before at-
tempting to operate the Transmig VAF4HD.
1. Make sure all necessary connections have been made (Refer to Subsection 3.01 of this manual).
2. Turn ON the power source and the wire feeder.
3. All the displays and discrete LED's start self-examination and all the lights on the panel are on for 1 sec-
ond. Left display shows firmware information of display PCB "DF X.X" and right display shows hardware
information of display PCB "DH X.X". 1.5 seconds later left display shows firmware information of motor
control PCB "PF X.X" and hardware information of motor control PCB "PH X.X".
4. Push the PURGE switch of the feeder and adjust the flow of shield gas.
5. Push the INCH switch of the feeder and adjust the WFS to the desired value by means of WFS control.
!
WARNING
If the gun switch is depressed, the electrode (welding wire) is electrically “hot”. Do not permit it to
touch any metal or a welding arc may be established which may be injurious to someone’s eyes (flash)
or skin (burn).
6. Adjust the voltage of the power source to the desired value. The gun switch must be triggered to close
power source contactor.
WARNING
In wire welding, the welding wire, wire reel (if used), input guide, feed rolls, output guide, feedhead,
and welding gun metal parts are all ELECTRICALLY “HOT”.
3.24 Arc Signal Override (SIL_1 #2)
WARNING
There are dangerous voltage and power levels inside this product. Turn OFF wirefeeder and disconnect
from the power source before removing cover from wirefeeder.
This switch on the motor control PCB configures the wire feeder for the presence of Arc Established signals from a
power source. If the power source has an Arc Established, then this switch should be OFF. If the power source does
not have these ‘Arc Signals’, then this switch should be ON. This switch allows the 2T / 4T and timer features to
work, although they will not be timed from the true start of the arc, but instead from when the gun trigger is pulled.
TRANSMIG 350i, 450i, 500i and 550i have the arc established signal and current feedback signal and SIL_1#2
should be set to OFF. Note that the DIP switch SIL1-#2 is factory default set to OFF.
TRANSMIG 400i, MPM20/500, MPM12/400, MPM8/270 and MPM8/255 do not have these signals, and SIL-1 #2
will need to be set to ON.
SIL_1 Switch
Art # A-11268_AB
Motor Control PCB
Figure 3-35 SIL_1 Switch on Motor Control PCB