Copyright Goodheart-Willcox Co., Inc. Chapter 7 Gas Metal Arc Welding Procedures and Techniques 75 The fi rst step is to select an initial setting from fi the appropriate chart in the Reference Section for the type and thickness of material involved. Select voltage and wire feed speed based on the electrode wire size. Record the machine settings and techniques that will be used as a starting point for the weld test on the weld schedule. The next step is to clean the material and make test welds. During the test weld period, listen to the JM Welding LLC Production Welding Schedule Process _______________________ Job # ____________________ WPS _______________________ PQR ____________________ Weld Type _______________________ Position ____________________ Base Metal _______________________ Thickness ____________________ Electrode _______________________ Diameter ____________________ Wire Speed ___________________ IPM Amperage Range ____________________ Electrode Stickout _______________________ Voltage Range ____________________ Inductance _______________________ Nozzle Diameter ____________________ Shielding Gas _______________________ Flow Rate ________________ CFH Travel Direction Forehand (Push) _______________________ Backhand (Pull) ____________________ Uphill _______________________ Downhill ____________________ Preweld Cleaning _______________________ Postweld Cleaning ____________________ Preheat Temp. _____________ Interpass Temp. _____________ Postheat Temp. _____________ Welder # _______________________ Quality Control # ____________________ Quantity _______________________ Quantity Checked ____________________ Date _______________________ Date ____________________ _________________________________________________________________________________ Notes Special Instructions Part Sketch sound of the arc as you are welding. When welding is performed in the short circuiting transfer mode, the molten wire should leave the end of the wire evenly without excessive noise and popping as it contacts the weld pool. A buzzing sound indicates the arc voltage and wire feed are properly set. When welding is performed in the spray transfer mode, there should be a continuous hissing sound without popping and interruption. During the test, make adjustments as needed. If the test produces an acceptable weld, revise the weld schedule to refl the adjusted values. flect Goodheart-Willcox Publisher Figure 7-15. Weld schedules are used by industry to record data for ready reference for each welding job.