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11th October 2019, 07:30 PM #1Most Valued Member
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- Aug 2015
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Unimig Razorweld 200 Welding 2.5mm Aluminium, Love this machine
Hey guys i chose to fab my own fuel tank no great loss if it leaks it will be a water holding tank.. however the welds are turning out really well, i bought a sheet of 2.5mm quality aluminium from Capral Aluminium and used my home made sheet metal bender, These weld pics are only some offcuts i dialed the machine in on so its only practice, Last night i watched WeldingTipsandTricks and tried to convert everything to millimeters and metric in general i came to the settings of imperial 0.098" thickness "2.5mm sheet", for every 0.001 is 1amp so technically i needed 100amps converted to 200inch per minute wire feed converted to metric is 5 meters a minute of wire feed bloody hard trying to do all the conversions... anyhow
i ended up at 5 meters per minute wire feed for 2.5mm material aluminium and than elding TipsandTricks said to start off at a low voltage and test each weld and turn it up one setting at a time, what i found was the wire was burning back so i found my own happy setting yes i have actually worked out how to use a mig welder based on weld appearing and what the wire is doing
i was up around 16volts came down to 14volts and played in between i found 10 meters a minute on the wire feed the perfect starting point, i noticed 16volts was pretty hot and it was leaving holes as i was passing kind of it was melting both sides of the material but it was leaving a elongated hole in the seam so i backed it down to 15volts the weld laid down much better and was a lower appearance but while running the bead i could see a hole in front of the molten pool so i backed it down to 14volts and it ran beautiful
running .9mm wire, 2.5mm material, 14volts, 10 meters a minute wire feed and i came out with this, i ran a continues 300mm bead without overheating or blowing any holes
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