Tweco VA 4000 Ultra-Feed - Manual (Page 38)

ULTRAFEED VA 4000
4-10 September 18, 2012
4.14 Arc Signal Overide
Switch #5 on the motor control board configures the wire
feeder for the presence of Arc Established signals from a
power source. If the power source has either an Arc
Established (as most Thermal Arc power sources have),
or a Current Feedback signal has (as most competitive
power sources have), then this switch should be CLOSED.
If the power source does not have these ‘Arc Signals’,
then this switch should be OPEN. This switch allows the
2 Step / 4 Step 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. Making a switch adjustment: Making a switch adjustment: Making a switch adjustment: Making a switch adjustment: Making a switch adjustment:
To make an adjustment to the system DIP switches,
remove the 8 sheet metal screws from the control box
and remove the sheet metal cover and door by gently
rocking it forward to pull it free from the feeder assembly.
Locate the 870309 Motor Control Board on the opposite
side of the feeder assembly as shown in Figure 4-8 below.
The DIP switches are locate at the top of the board as
shown. Set switch # 5 according to your set up and replace
the cover.
1 2 3 4 5
Front
Switch # 5
Art # A-07381
CLOSED
OPEN
Figure 4-8: Arc Signal Overide DIP Switch Location and Settings