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  1. #16
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

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    Quote Originally Posted by jack620 View Post
    Easily done on the acetylene reg. Not so easy on your standard 1000kPa oxy reg. It's barely off the stop and the reg can sometimes pulse because it's working at the very bottom of its range.
    I have done it so many times I plain forgot to write it in the description.Sorry about that!
    Set up your acetylene gauge as described. Let the acetylene blow into the palm of your hand. Using the oxygen gauge adjust the oxygen pressure until that pressure is the same as the acetylene pressure was on your palm.
    It is pretty accurate and was taught to me by an old fella that had forgotten more about oxy-acetylene welding than I'll ever know.

    He used to weld up model sailing ships out of plate using the oxy filler wire as the rigging.The reduction in pressure of the welding flame reduced the size of the flame envelope and therefore less heat from the volume of the flame was available to distort the metal.
    With that, he was able to tack the cross steps on the rigging which was 1.6mm filler wire. Cleaned up the half sectioned model was painted with a copper paint and clear lacquered.He got between $20 and $40 dollars for something that basically started out as 1.6mm plate and wire.That was his beer money.

    Grahame

  2. #17
    Join Date
    Nov 2007
    Location
    melbourne australia
    Posts
    3,228

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    Quote Originally Posted by Grahame Collins View Post
    Let the acetylene blow into the palm of your hand. Using the oxygen gauge adjust the oxygen pressure until that pressure is the same as the acetylene pressure was on your palm.
    Thanks for the tip Grahame. I look forward to trying it. Do you need to open the oxygen and acetylene valves on the handpiece by the same amount before tweaking the oxygen reg? Otherwise I don't think you would end up with the same pressure.
    Chris

  3. #18
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

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    I had always used no more than a single turn. It is approx 5 psi but there's a pressure point you should not go below as otherwise, the odd spark goes up the nozzle tube as there is insufficient pressure to prevent it. That's when the torch backfires and makes life interesting.If the torch is starting to bang and pop, increase the regulator pressure( just a lil bit -at a time).Thinking about it,the stainless steel should not spark as much as steel tends to do.

    Grahame

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