Lincoln Electric 12246, Руководство оператора, Страница: 24 / 68

B-7
INSTALLATION FLEXTEC™ 500 P
CONTROL CABLE AND VOLTAGE SENSING
CONNECTIONS
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™ 500 P. 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 communication 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™ 500 P has
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 as
follows when in “ArcLink” mode position:
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.
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.
PROCESS ELECTRODE VOLTAGE SENSING 1 WORK VOLTAGE SENSING 2
GMAW 67 LEAD VOLTAGE SENSE AT STUDS
GMAW-P 67 LEAD VOLTAGE SENSE AT STUDS
FCAW 67 LEAD VOLTAGE SENSE AT STUDS
GTAW VOLTAGE SENSE AT STUDS VOLTAGE SENSE AT STUDS
SMAW VOLTAGE SENSE AT STUDS VOLTAGE SENSE AT STUDS