Tweco VA 4000 Ultra-Feed - Manual (Page 36)

ULTRAFEED VA 4000
4-8 September 18, 2012
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4.09 System DIP Switches
The 870309 Motor Control Board contains a 5 position
DIP switch that allows the user to (1) optimize the runin
wire feed characteristics for optimal starting, and (2)
override the Arc Established signal so that the 4 Step
Operation can be used on power sources that do not have
an Arc Established signal or current feedback.
RUN-IN SPEED RUN-IN SPEED RUN-IN SPEED RUN-IN SPEED RUN-IN SPEED ADJUSTMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT:::::
Art # A-07507
The run-in speed adjustment controls the speed the wire
approaches the work at. These switches select a
percentage of the set speed. The selectable percentages
are 25%, 50%, 75% (default), and 100%. For example,
if you have 400 IPM set speed, and have 50% selected
here, then the speed of the wire will be 200 IPM until an
arc gets established. Once an arc is established, the speed
ramps to the set speed at the rate set with Ramp Rate as
described in the next paragraph.
RAMP RA RAMP RA RAMP RA RAMP RA RAMP RATE TE TE TE TE ADJUSTMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT ADJUSTMENT:::::
S
Art # A-07508
The ramp rate adjustment sets how fast the wire feeder
accelerates the wire. This setting is the amount of time it
takes to go from 0 to 875 inches per minute. The times
are .1, .2 (default), .3, or .4 seconds. This setting works
together with the runin speed adjustment to tune the wire
starting characteristic with the power source being used
to offer optimal starting.
PROCEDURE PROCEDURE PROCEDURE PROCEDURE PROCEDURE
WARNING
ELECTRIC SHOCK CAN KILL. Remove input
power from the wire feeder before making an
adjustment to the system DIP switches.
Turn the power source and wire feeder power switches
OFF. Remove the eight (8) screws holding the sheet metal
cover and carefully remove it from the unit. The 870309
Motor Control Board will contain a 5 position DIP switch
labelled S1 (Refer to Figure 4-7 below).
To open any of the DIP switches, push the switch toward
the word OPEN, which is labelled on the switch. To close
any of the DIP switches, push the switch away from the
word OPEN.
After the settings have been made, reattach the sheet
metal cover and reapply power to the power source and
wire feeder.
S1
ARC
SIGNAL
SIGNAL
D'ARC
X = CLOSED O = OPEN
S
1 2
100%
75%
50%
25%
0 0
0 X
X 0
X X
3 4 5
0.4 S
0.3 S
0.2 S
0.1 S 0 0
0 X
X 0
X X
ON/Marche
OFF/Coupe
0
X
Art: A-07506
Figure 4-7: System DIP Switch