Lincoln Electric POWER WAVE 455M Manuel D'utilisation page 7

some innershield applications, reverse the output
connections at the Power Wave (electrode cable to the
negative (-) stud, and work cable to the positive (+)
stud).
When operating with electrode polarity negative the
"Electrode Sense Polarity" DIP switch must be set to the
"Negative" position on the Wire Drive Feed Head PC
Board. The default setting of the switch is positive
electrode polarity. Consult the Power Feed instruction
manual for further details.
Voltage sensing
The best arc performance occurs when the Power
Waves have accurate data about the arc conditions.
Depending upon the process, inductance within the
electrode and work lead cables can influence the voltage
apparent at the studs of the welder. Voltage sense
leads improve the accuracy of the arc conditions and
can have a dramatic effect on performance. Sense Lead
Kits (K940-10, -25 or -50) are available for this purpose.
WARNING: If the voltage sensing is enabled but the
sense leads are missing, improperly connected, or if the
electrode polarity switch is improperly configured,
extremely high welding outputs may occur.
The Electrode sense lead (67) is built into the control
cable, and is automatically enabled for all semi-
automatic processes. The Work sense lead (21)
connects to the Power Wave at the four pin connector
located underneath the output stud cover. By default the
WORK voltage is monitored at the output stud in the
Power Wave. For more information on the WORK sense
lead (21), see the following paragraph (Work Voltage
Sensing).
All constant current processes sense the voltage at the
output studs of the Power Wave by default.
Enable the voltage sense leads as follows:
Electrode
Process Voltage Sensing
67 lead *
GMAW 67 lead required
GMAW-P 67 lead required
FCAW 67 lead required
Voltage sense at
GTAW
Voltage sense at
GTAW-P
SAW 67 lead required
Voltage sense at
CAC
455M/STT only
STT 67 lead required
* The electrode voltage 67 sense lead is integral to the
control cable to the wire feeder.
Work Voltage Sensing
The standard Power Wave is shipped with the work
voltage sense lead:
• Disabled, for 455M.
•
Enabled, for 455M/STT.
For processes requiring work voltage sensing, connect
the (21) work voltage sense lead (K940) from the Power
Work Voltage
Sensing 21 lead
21 lead optional
21 lead optional
21 lead optional
Voltage sense at
studs studs
Voltage sense at
studs studs
21 lead optional
Voltage sense at
studs studs
21 lead optional
Wave work sense lead receptacle to the work piece.
Attach the sense lead to the work piece as close to the
weld as practical, but not in the return current path. If
necessary, change the work voltage sensing status in
the Power Wave as follows:
•
Turn off power to the power source at the
disconnect switch.
•
Remove the front cover from the power source.
• The control board is on the left side of the power
source. Locate the 8-position DIP switch and look
for switch 8 of the DIP switch (see picture below).
•
Using a pencil or other small object, slide the switch
right to the OFF position if the work sense lead is
NOT connected. Conversely, slide the switch to the
ON position if the work sense lead is present (see
picture below).
•
Dip-switch factory default configuration:
Sw 455M
1 Not used
2 Not used
Equipment group 1
3
selected
Equipment group 2
4
selected
5 Not used
6 Not used
Auto mapping
7
(enable=off)
Work sense lead
8
(connected=On)
•
Replace the cover and screws. The PC board will
"read" the switch at power up, and configure the
work voltage sense lead appropriately.
Electrode Voltage Sensing
Enabling or disabling electrode voltage sensing is
automatically configured through software. The 67
electrode sense lead is internal to the cable to the wire
feeder and always connected when a wire feeder is
present.
Important: The electrode polarity must be configured at
the feed head for all semi-automatic processes. Failure
to do so may result in extremely high welding outputs.
Power Wave to semi-automatic Power
Feed Wire Feeder interconnections
The Power Wave and semi-automatic Power Feed
family communicate via a 5 conductor control cable
(K1543). The control cable consists of two power leads,
one twisted pair for digital communication, and one lead
for voltage sensing. The cables are designed to be
7
455M/STT
# Not used
# Not used
Off Not used
Off Not used
# Not used
# Not used
Off Not used
Work sense lead
Off
(connected=On)
#
#
#
#
#
#
#
On