The PAWS is a full function (travel, AHC, oscillation and wire) weld system for making GMAW groove welds. It is designed to be used with Bug-O tracks to weld horizontal and circumferential joints.
Weld power is provided by the Lincoln Electric PowerWave S500 or S350 and are controlled by the PAWS’s process control system.
To facilitate rapid assembly and disassembly and for ease of transport, the PAWS is made up of a number of lightweight modules:
- Universal weld carriage
- Torch height controller
- Wire feeder
Both weld and sequence parameters are set and adjusted at the operator’s pendant. The pendant is attached to the weld carriage by a cable allowing the operator to manage the system at some distance from the process, or it can be mounted directly upon the carriage. The pendant, along with the network of controller components in the PAWS’s distributed control system makes up the process control system.
The semi-automatic MIG and FCAW weld control system is modular in design to optimize weld process control while minimizing operator training. The system provides control of the weld carriage travel and all weld sequence parameters, which are easily set and adjustable from the operator’s pendant.
Weld process control is incorporated via several modules integrated into the weld system. A microprocessor, distributed I/O and master logic PCB are located within the carriage guard while the motion control system is directly integrated into the motor of each axis.
All motorized axes utilize DC high torque stepper motors with integrated motion controllers and micro-stepping drives. Due to the use of these stepper motors and precision circuit design, the PAWS process control system requires no field calibration. The motor only needs to be programmed for the appropriate axis for repair and replacement to be complete.
The travel axis incorporates a two-speed travel jog system that allows for precise torch positioning as well as rapid traverse in order to position the carriage assembly quickly and precisely during both weld and setup modes.