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Application Title: Steel Framing Stud Welder

Industry: Steel

Components Used: :
(1) 6K4; 4-axis motion controller
(1) EVM32-BASE; expansion I/O module with digital input & digital output SIM
(1) MotionPanel; HMI for Compumotor 6K
(3) GV-L3E; 3 Amp continuous Gemini digital servo drive
(3) SM233AE-NGSN; size 23 servo motor
(1) ERB50-BLTRA20-FSR4275-A; 14 foot rodless actuator
(1) ER50-IDLER-4275; 14 foot idler unit
(2) ETB50-B05PA20-FSAF1000-AXX; 1000mm Electro-Thrust cylinder with linear guide module

misc. ParFrame

Other Key Components:
(2) Banner PicoDot ruggedized convergent mode laser sensor

Competition:
The competition was an integrator combining products from various manufacturers.

Other Details:
The program was written using the “Wizard” functionality in Motion Planner.

Application Description:

The machine consists of two MIG welding guns mounted to ETB50 Electro-Thrust cylinders (Z & Z’ axes) on either side of a conveyor.  An ERB50 rodless actuator and ER50 idler unit (X axis) positions the assembly along the conveyor.  The operator loads an unknown number of steel framing studs on the conveyor and clamps them with a button on the MotionPanel.  The Z axis then scans the studs with a laser sensor to determine the number of studs and the location of the joints through position capture inputs on the 6K.  The Z’ axis scans the opposite side in the same manner.  This scanning action is necessary because of inconsistencies in the studs.  The X, Z, and Z’ axes position themselves for the start of the first weld.  The Z and Z’ axes become slaves to the X axis master and perform a weaving motion through a compiled following profile.  Therefore, the speed of the weld can be altered without affecting the profile.  Once all of the welds in a column are completed, the Z and Z’ axes retract and the X’ axis moves to the next weld position to repeat the process.

The galvanized steel caused the laser sensor to detect multiple edges on the surface and radius of a stud.  The flexibility of the 6K programming language made it possible to filter the inputs and accurately determine the position of the joints.
Why was the Parker Solution Chosen?

The customer chose a Parker solution because of the complete system modularity and all the components came from a single source.

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