Certified Robotic Arc Welding (CRAW) case studies
AWS CRAW · Put your knowledge to work in context.
The Certified Robotic Arc Welding (CRAW) credential from the American Welding Society (AWS) verifies that a professional can set up, operate, program, and support robotic arc welding systems to industry standards. It is intended for people working in automated welding production environments. The AWS CRAW case studies are 5 cases and about 3,351 words.
1Intermittent Arc Stubbing and Restart Porosity on a 1.2 mm GMAW Cell
A six-axis robot welds 6 mm mild-steel fillets with 1.2 mm ER70S-6 wire and a 90Ar/10CO2 shield. Parameters are 260 A, 28 V, 6.4 mm/s travel, 15 mm stickout and a 10 degree push angle.
699 words, about 3 min2Touch-Sensing Offset Bias After a Fixture Change
A robotic cell welds a 300 mm fillet on a fabricated bracket at 22 mm/s. Touch sensing uses three search points per seam, a 25 mm/s search speed and a 60% torque limit.
665 words, about 3 min3Clearing a Bird's Nest on Second Shift
During second shift an operator finds a bird's nest at the torch of a robotic GMAW cell running 350 A at 28 V. To clear it, he turns the mode selector to maintenance, which mutes the 2 m light curtain and caps robot speed at 250 mm/s, then walks into the cell while the robot is still in automatic.
672 words, about 3 min4Root-Bend Failures on a 12 mm CJP Groove
A 12 mm A36 plate is joined with a single-V groove and FCAW-G using 1.2 mm E71T-1 wire. The procedure calls for a 2 mm root gap, ceramic backing tape and three passes.
661 words, about 3 min5TCP Drift After a Torch Collision
After a minor collision at the torch, a 6-axis robot with a 280 mm torch length produces welds that are 1.8 mm out of position along the seam normal. The maintenance team re-mastered axis 6 using the fixture marks, replaced the torch mount and re-ran the production program without touching the tool frame.
654 words, about 3 min