Return-Path: Received: from mtiwmhc11.worldnet.att.net ([204.127.131.115] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2624300 for flyrotary@lancaironline.net; Sat, 04 Oct 2003 19:50:23 -0400 Received: from unknown (249.birmingham-03-04rs.al.dial-access.att.net[12.86.89.249]) by mtiwmhc11.worldnet.att.net (mtiwmhc11) with SMTP id <2003100423502111100nm9dme>; Sat, 4 Oct 2003 23:50:21 +0000 Message-ID: <002701c38ace$ff5bacc0$f959560c@unknown> From: "Michael D. Callahan" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: I welded!!! Date: Sat, 4 Oct 2003 18:26:50 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0024_01C38AA5.13EF6980" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0024_01C38AA5.13EF6980 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message"When I got it home I made a steel table - no problem., but I = couldnt weld anything aluminum without melting the entire piece." John, Did you have the machine set to AC and high freq continuous? I was = having a really tough time one day until I figured out that the machine = was still on DC. It just won't work that way. Also, make sure the = tungsten isn't contaminated, and if there is black smoky looking stuff = on the weld, that's oxide. It melts at about 5K degreesF, so that will = also cause your part to melt. If you have the machine set right, and the = proper size tungsten, and enough gas (need more in drafty conditions) , = aluminum is easy to TIG. Sounds like a machine setup problem to me. = Mike C. ------=_NextPart_000_0024_01C38AA5.13EF6980 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
"When I got it home I made a steel = table - no=20 problem., but I couldnt weld anything aluminum without melting the = entire=20 piece."
 
John,
    Did you have the machine set to = AC and high=20 freq continuous? I was having a really tough time one day until I = figured out=20 that the machine was still on DC. It just won't work that way. Also, = make sure=20 the tungsten isn't contaminated, and if there is black smoky looking = stuff on=20 the weld, that's oxide. It melts at about 5K degreesF, so that will also = cause=20 your part to melt. If you have the machine set right, and the proper = size=20 tungsten, and enough gas (need more in drafty conditions) , = aluminum is=20 easy to TIG. Sounds like a machine setup problem to me.  Mike=20 C.
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