OUR FIRST TRY WELDING ALUMINUM WAS SOMEWHAT UNSUCCESSFUL. WE CLEANED TWO 8" SQUARE PIECES OF 1/8" DIAMOND PLATE SCRAP. WE DON'T KNOW WHAT VARIETY OF MATERIAL IT WAS. AS SPECIFIED IN THE MILLER MANUAL WE SET THE FOLLOWING PARAMETERS - 140 AMPS 3/32 RED TIPPED CORRECTLY SHARPENED TUNGSTEN, 30 CFM STRAIGHT ARGON, AC ELECTRODE NEGATIVE. WE SET THE 'DEP' KNOB TO DEEPER PENETRATION. WE USED SOME PRE & POSTFLOW FOR GOOD MEASURE AND USED NO FILLER THE FIRST TIME. BASICALLY WHAT WE HAVE TO REPORT IS THAT ALONG THE 3" LINE OF FUSED WELD WE APPARENTLY DEVELOPED A CRACK. ANY IDEAS? WE DIDN'T HAVE ANYFILLER SO WE SHEARED A SLIVER OF THE PLATE AND TRIED TO FILL A CRATER AND ALL WE DID WAS CREATE A BIGGER BLEMISH. NOW WHAT ANY COMMENTS ARE APPRECIATED
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20 years ago