Tweco WC 1 Weld Sequence Controlle - Manual (Page 14)

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5.0 CONTROL SPECIFICATION
5.1 Enclosure Specification
The Weld Sequence Controller consists of a Main CPU P.C. board, Display/Keypad P.C. Board and
a 2-line 16-character LCD display. All external user connections are made via seven P.C. Board
mounted screw terminal blocks. The controller is designed to allow the addition of a Capstan PWM
motor drive controller, which can be used to control the Capstan Cold Wire Feed system. The PWM
module is installed in the rear of the control enclosure. There will also be provisions made to install
the necessary Power supply components inside the enclosure. This consists of a transformer, and
power supply assembly and wiring harness. This allows easy installation of the wire drive controller
option. The sheet metal enclosure is a clamshell design and conforms to a NEMA 1 rating.
5.2 Control Cables and Connectors
The enclosure has a single 15 ft rigid mounted power source control cable to interface to the
Thermal Arc power source. A rigid mounted 6 ft 115 VAC molded cable is used to provide power to
the controller. Provisions are made to allow a rigid mounted Capstan™ drive motor cable and PWM
Motor drive control Heat sink assembly to be installed. This option allows the WC 1 to program and
control a Capstan™ cold wire feed drive. A 9-pin CPC Circular connector is provided to allow
interconnection of an optional operator control pendant. A RS-232-C Female DB-9 connector is
provided to allow off-line programming of the weld schedules.
5.3 Controls and Status Indicators
The following is a summary of the front panel controls and status indicators:
•
POWER SWITCH – Illuminated rocker switch applies power to the controller.
•
PROGRAM/RUN – Key Lock switch that enables the WC 1 program mode. When the
switch is in the program position the user has full access to the controller weld schedules
and configuration parameters. When set in the run position the operator can only change
the parameters enabled within a specified high/low limit.
•
SELECT – This momentary pushbutton switch is used to select the WC 1 parameter to be
modified. Editing of the selected parameter is only allowed when the key switch is in the
program position.
•
INC /DEC – These two momentary push button are used to increase or decrease the
selected parameter. Editing of the selected parameter is only allowed when the key switch
is in the program position.
•
START LED – Indicates when the weld event is in the start sequence.
•
RAMP UP LED – Indicates when the weld event is in the Ramp Up sequence.
•
RUN LED – Indicates when the weld event is in the Run sequence.
•
TAPER LED – Indicates when the weld event is in the Taper sequence.
•
RAMP DOWN LED – Indicates when the weld event is in the Ramp down sequence.
•
END LED – Indicates when the weld event is in the End sequence.