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Фрагмент инструкции
The polarity (+ or -) determines which direction the current is flowing. DC Reverse Polarity - occurs when the electrode holder is connected to the positive pole of the welding machine. Reverse Polarity directs more heat into melting the electrode rather than the work piece. It is used on thinner material. DC Straight Polarity - occurs when the electrode holder is connected to the negative pole of the welding machine. With straight polarity more heat is directed to the work piece for better penetration on thicker material. Electrode - a coated metal wire having approximately the same composition as the material being welded. Fillet Weld - approximately a triangle in cross-section, joining two surfaces at right angles to each other in a lap, T or corner joint. Flux - a coating, when heated, that produces a shielding gas around the welding area. This gas protects the parent and filler metals from impurities in the air. Flux Cored Arc Welding (FCAW) - also called Gasless, is a welding process used with a wire-feed welding machine. The weld wire is tubular with flux material contained inside for shielding. Gas Metal Arc Welding (GMAW) - also called MIG, is a welding process used with a wire feed welding machine. The wire is solid and an inert gas is used for shielding. Gas Tungsten Arc Welding (GTAW) also called TIG, is a welding process used with welding equipment with a high frequency generator. The arc is created between a non-consumable tungsten electrode and the work piece. Filler metal may or may not be used. Lap Joint - a joint between two overlapping members in parallel planes. Open Circuit Voltage (OCV) - the voltage between the electrode and the work clamp of the welding machine when no current is flowing (not welding). The OCV determines how quickly the arc is struck. Overlap - occurs when the amperage is set too low. In this instance, the molten metal falls from the electrode without actually fusing into the base metal. Porosity - gas pockets, or cavities, formed during weld solidification. They weaken the weld. Penetration - the depth into the work piece that has been heat effected by the arc during the welding process. A good weld achieves 100% penetration meaning that the entire thickness of the work piece has been heated and resolidified. The heat effected area should be easily seen on the opposite side of the weld. Shielded Metal Arc Welding (SMAW) -also called Stick, is a welding process that uses a consumable electrode to support the arc. Shielding is achieved by the melting of the flux coating on the electrode. Slag - a layer of flux soot that protects the weld from oxides and other contaminants while the weld is solidifying (cooling). Slag should be removed after weld has cooled. Spatter - metal particles thrown from the weld which cool and harden on the work surface. Spatter can be minimized by using a spatter resistant spray on the work piece before welding. Tack Weld - weld made to hold parts in proper alignment until final welds are made. Travel Angle - the angle of the electrode in the line of welding. It varies from 5. to 45. depending on welding conditions. T Joint - made by placing the edge of one piece of metal on the surface of the other piece at approximately a 90. angle. Undercut - a condition that results when welding amperage is too high. The excessive amperage leaves a groove in the base metal along both sides of the bead which reduces the strength of the weld. Weld Pool or Puddle - a volume of molten metal in a weld prior to its solidification as weld metal. Weld Bead - a narrow layer or layers of metal deposited on the base metal as the electrode melts. Weld bead width is typically twice the diameter of the electrode. Work Angle - the angle of the electrode from horizontal, measured at right angles to the line of welding. 8 Models WF1800, WF1900 and WF2000 Heat too high Wire speed too slow Heat too low Travel speed too low Travel speed too fastNormal heat, wire speed, travel speed Base metal Figure 17 - Weld Appearance Wire speed too fast S3 OFF L2L1 GUN S2 ~ WIRE SPEED CONTROL BOARD1234 +- DRIVE DECK M ++ -- -+ ~ GREENWHITEBLACK S1 T1 MAX MIN GROUND S3 NC OPENS @ 120°C Y TO TORCHTO WORK CLAMP Figure 18 - Wiring Schematic (WF1800) Y S4 NC OPENS @ 127.C ON/OFF S1 GROUND MIN MAX T1S2 BLACKWHITEGREEN~ + - S4 -+ M DRIVE DECK -+ 4 3 2 1 ~ S3 GUN 1 2 4 5 6 L2 L1 TO WORK CLAMP TO TORCH WIRE SPEED Figure 19 - Wiring Schematic (WF2000) CONTROL BOARD 9 Operating Instructions and Parts Manual For Information About This Product Call 1-800-746-5641 Troubleshooting Chart - Welder Symptom Possible Cause(s) Corrective Action No output 1. Duty cycle exceeded 2. Poor work clamp connection 3. Defective ON/OFF switch 4. Blown breaker or fuse 1. Allow welder to cool until ON/OFF Switch lamp goes out 2. Be sure all connections are secure, and attaching surface is clean 3. Replace switch 4. Reduce circuit load, reset breaker or replace fuse Wire tangles at drive ro...
Эта инструкция также подходит к моделям:Сварочные аппараты - WIRE FEED WF1900 (1.5 mb)
Сварочные аппараты - WIRE FEED WF1800 (1.5 mb)