Lincoln Electric Flextec 500X CE Operator's Manual page 21

FLEXTEC ® 500X
CONTROL CAbLE AND VOLTAGE SENSING CONNEC-
TIONS
General Guidelines
Genuine Lincoln control cables should be used at all times (except
where noted otherwise). Lincoln cables are specifically designed
for the communication and power needs of the Flextec
Most are designed to be connected end-to-end for ease of
extension. Generally, it is recommended that the total length not
exceed 100 feet (30.5 m). The use of non-standard cables,
especially in lengths greater than 25 feet, can lead to commu-
nication problems (system shutdowns), poor motor acceleration
(poor arc starting), and low wire driving force (wire feeding
problems). Always use the shortest length of control cable
possible, and DO NOT coil excess cable.
Regarding cable placement, best results will be obtained when
control cables are routed separate from the weld cables. This
minimizes the possibility of interference between the high currents
flowing through the weld cables, and the low level signals in the
control cables.
Voltage Sensing Overview
The best arc performance occurs when the Flextec
accurate data about the arc conditions. Depending upon the
process, inductance within the electrode and work cables can
influence the voltage apparent at the studs of the welder, and
have a dramatic effect on performance. A remote electrode
voltage sense lead is used to improve the accuracy of the arc
voltage information supplied to the machine. The electrode sense
lead is integral to the ArcLink control cable.
General Guidelines for Voltage Sense Leads
Sense leads should be attached as close to the weld as practical,
and out of the weld current path when possible. In extremely
sensitive applications it may be necessary to route cables that
contain the sense leads away from the electrode and work
welding cables.
Voltage sense leads requirements are based on the weld process
PROCESS ELECTRODE VOLTAGE SENSING
as follows when in "ArcLink" mode position:
GMAW
FCAW
GTAW
SMAW
1. The electrode voltage sense lead (67) is automatically
enabled by the weld process, and integral to the 5-pin
ArcLink control cable.
2. Negative polarity semi-automatic process operation
requires the Meter Polarity Switch on the case front to be
set to electrode negative for proper operation.
® 500X.
® 500X has
67 LEAD
67 LEAD
VOLTAGE SENSE AT STUDS
VOLTAGE SENSE AT STUDS
Electrode Voltage Sensing
The remote ELECTRODE sense lead (67) is built into the 5-pin
ArcLink control cable (K1543-xx) and is always connected to the
wire drive feed plate when a wire feeder is present.
Negative Electrode Polarity
Negative polarity semi-automatic process operation, in the ArcLink
mode, requires the Meter Polarity Switch located on the case
front, above the output studs, to be set to electrode negative for
proper operation.
1 WORK VOLTAGE SENSING
VOLTAGE SENSE AT STUDS
VOLTAGE SENSE AT STUDS
VOLTAGE SENSE AT STUDS
VOLTAGE SENSE AT STUDS
A-12
INSTALLATION
2