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ALC-101 Arc Length Control

ALC-101 Arc Length Control
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- In addition to pro-viding control of the arc voltage, the ALC-101 is capable of controlling the weld sequence using five timers de- signed to start and stop associated equipment. They control the starting and stopping of the travel, the wire feed and the welding power supply. > - Electrical touch re-tract allows the starting arc gap to be set. After the knob on the control has been set to the desired position, and after the torch down switch has been pressed and held, the actuator will move the torch down until the elec- trode contacts the part to be welded. The contact is sensed by the control which then reverses the direction of actuator travel for a preset time thus setting the arc gap. ALC-101E CONTROL Arc Voltage Sensing > - The arc lengthcontrol measures arc voltage and compares the resulting signal to the value entered by the operator. To maintain the set arc length, the con- trol works with a field proven servo drive to move the torch up or down as required.Օ > The ALC-101 Arc Length Control is designed forstand-alone welding applications where, in addi- tion to control of the arc voltage, it is important to have preset, automatic control of the welding se- quence.The ALC-101 incorporates three features: The control is designed to provide automatic con- trol of the arc voltage and includes a ten-turn potentiometer and large digital display to set and indicate the arc voltage. Controls are also pro- vided to set the starting arc gap, volt sensing delay, sensitivity and stop retract distance. The sequence control includes:Travel start delay timer (0 to 10 secs.)Travel stop delay timer (0 to 10 secs.) Wire feed start delay timer (0 to 10 secs.) Wire feed stop delay timer (0 to 10 secs.) Arc stop delay timer (0 to 10 secs.)The control can be used for DC or ACwelding. When AC is being used, it is necessary to install the AC enhancement kit which provides superior performance.Interface kits are required for sequencecontrol and for use when pulsed or slope current conditions exist. Contact Jetline for details or available interface kits. > The ALC-401-60C actuator consists of a rugged servo driven motor slide. The slide is a ball screw design coupled with two hardened and ground shafts using recir- culating ball bushings. The entire mecha- nism is enclosed in a steel housing and can handle up to 40 lbs (18 kg) at the centerline of the torch. A universal torch holder is provided at the end of the slide.Alternative compact actuators are op-tionally available with either 1" (25 mm) or 4" (100 mm) stroke. > ALC-401-6 ACTUATOR

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