Lincoln Electric CWT ATC-3, Operator'S Manual

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1.0 OVERVIEW
The Lincoln Electric Company Automatic Torch Control (ATC-3) is a compact, lightweight, welding
torch manipulation control system; comprised of the Automatic Torch Control (ATC-3), an Operator
Control Pendant and a stepper motor driven Linear Slide Assembly (LSA). This system provides
independent control of torch movements in the vertical plane.
The ATC-3 provides Torch Height Tracking control using Lincoln Electric Company's patented Thru-
Arc  sensing technology. The Thru-Arc Tracking System provides two modes of Torch Height
Tracking Control, Arc Voltage Control (AVC) or Arc Current Control (ACC) utilizing feedback
information from the welding arc voltage and welding current measured with an external voltage/current
sensor assembly provided with the system.
The Linear Slide Assembly (LSA) provides 7” of vertical motion and has a weight capacity of 25 lbs @
3” from the face of the carriage. The Torch Slide Assembly module is installed using the provided
mounting bracket. The mounting bracket is designed to fit any of the bracket mount locations on the
back of the slide.
ATC-3™ ENCLOSURE GENERAL SPECIFICATIONS
Dimensions 4.75"h x 2.0"w x 11.0"l (120.6mm x 50.8mm x 279.4mm)
Mounting Dimension 1.25" wide x 10.25" long, four 0.25” diameter hole
Weight 4 lbs (1.18 kgms)
Power Input 120 or 240 ± 10% vac 50 / 60 hz @ 5.0 amps
Operating Temperature -10°F (-23°C) to +140°F (+60°c)
ATC-3™ ENCLOSURE CONTROL SPECIFICATIONS
Motor Output Current 1.0 - 6.5 amps peak each phase
Motor Output Voltage 1.5 - 18.0 volts peak each phase
Current Profile Sine / Cosine
Limit with Inputs CW and CCW 5.0 vdc active low Inputs with internal 4.7K ohm pull
up resistor
Step Resolutions 10 micro steps / step
Velocity 10 - 8000 steps / sec
Acceleration 10 - 1000 steps / sec 2
Index step count 1 - 65535 steps
Index Scale Factor 1-255 steps / step scale factor
Communications Isolated RS485 19,200 Baud Modbus RTU port
LSA-3007 SLIDE SPECIFICATIONS
Dimensions 15.86”H x 3.98”W x 2.59”D (403mm X 100mm x 66mm)
Mounting Dimensions 2.125“ H X 1.625” W (53.98mm X 41.28mm)
Weight 7 lbs (3.18kg)
Weight Capacity 25 lbs (11.34 kg) at 3” (76.2mm) from slide face
Max Travel Distance 6.5” (165.1mm)
Travel Velocity 0.2“ – 1.5” (5.08mm - 38.1mm) per second
Operating Temperature 0° to 150° F (0° to 65° C)