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My ironing machine is doing funny things.

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  • My ironing machine is doing funny things.

    We have this ironing machine with the roller and steam. You put a towel or sheet in, step on a pedal and the roller feeds the material in and out. Presto flat material.

    The heating element started doing funny things today. It would get hot and then cool off. I took the cover off and found a component that was arcing and the heating lamp indicator flashed according to the arcing.

    Curious as to what this component does. It is hooked in a series to the heating elements. There are two of these parts. One on each end.


    Location: The Black Forest in Germany

    How to become a millionaire: Start out with 10 million and take up machining as a hobby!

  • #2
    An over temp sensor but they are supposed to fail open? And they usually don't reset themselves.
    Gene

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    • #3
      Originally posted by topct View Post
      An over temp sensor but they are supposed to fail open? And they usually don't reset themselves.
      This thing makes a real pretty green arc. I thought maybe it had a LED or something sort of like when you plug in a Ethernet cable.
      Location: The Black Forest in Germany

      How to become a millionaire: Start out with 10 million and take up machining as a hobby!

      Comment


      • #4
        I expected some comments about your wife doing funny things...

        It is either a high limit (safety) switch or it's a fixed temp control switch. Is there more to the circuit? More temp switches? Snap disc are used commonly.

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        • #5
          Most likely they are thermostats to maintain the correct temperature. They open and close at different temperatures so they don't usually "chatter", but it seems the contacts have failed and are arcing. It might be repairable, or you can get a replacement for about $5 or less. If you want it to last "forever" you can use the thermostat to drive a SSR which can handle the power to the heaters.

          Here are some that might work:
          http://www.surplussales.com/Thermal/Thermal-1.html
          http://pauleschoen.com/pix/PM08_P76_P54.png
          Paul , P S Technology, Inc. and MrTibbs
          USA Maryland 21030

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          • #6
            Originally posted by Abner View Post
            I expected some comments about your wife doing funny things...
            LOL You beat me to it!
            Max
            http://joyofprecision.com/

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            • #7
              I expected to see a machine for ironing sheep prior to shearing them.
              Location: Long Island, N.Y.

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              • #8
                It takes an iron man to do an iron sheep.
                http://pauleschoen.com/pix/PM08_P76_P54.png
                Paul , P S Technology, Inc. and MrTibbs
                USA Maryland 21030

                Comment


                • #9
                  Originally posted by Black Forest View Post
                  We have this ironing machine with the roller and steam. You put a towel or sheet in, step on a pedal and the roller feeds the material in and out. Presto flat material.
                  ......................
                  [URL]
                  They are called Mangles
                  My mom had one in 1948

                  Rich

                  Comment


                  • #10
                    Its the actual thermostat for the hairpin element, there is a buckle washer or strip in it that bends like a bimetallic strip to open above working temp and close below, theres a copper or beryllium copper contact on it, over time the surface has pitted just like points of a car, the green light is the characteristic spectra of copper, lovely colour it is too, every time the strip is operating its arcing, the unit is supposed to snap open and closed like the buckle washer in an automatic kettle, sometimes when they get old they slow down and self destruct with arcing, it sounds like it does not have many operating cycles left before either permanent open or worse welds shut, there is a fusable link in the hairpin element to prevent thermal runaway, it will fail about 20 degrees over max temp so you will have to change both if you do keep using it, just change it, the temp should be on the side, some replacements are round, also found in the back of tumble dryers, espares or someone will have them not expensive but judging by the ironers age you would be pushed to get a new element.
                    I have trained the missus to fold clothes off the line and not bother with ironing, id does work!
                    Two pet hates, ironing (ok shirts sometimes need a press) and volvo headlights being on all the time!
                    Think how many MWatts or barrels of oil have been wasted lighting up daylight and pressing clothes, i rekon the world reserves of oil would get consumed by them eventually, i remember my mum ironing with an iron on the stove, seemed to work ok, suppose folk with an aga or wood burner could do that
                    Mark

                    Comment


                    • #11
                      Originally posted by boslab View Post
                      Its the actual thermostat for the hairpin element, there is a buckle washer or strip in it that bends like a bimetallic strip to open above working temp and close below, theres a copper or beryllium copper contact on it, over time the surface has pitted just like points of a car, the green light is the characteristic spectra of copper, lovely colour it is too, every time the strip is operating its arcing, the unit is supposed to snap open and closed like the buckle washer in an automatic kettle, sometimes when they get old they slow down and self destruct with arcing, it sounds like it does not have many operating cycles left before either permanent open or worse welds shut, there is a fusable link in the hairpin element to prevent thermal runaway, it will fail about 20 degrees over max temp so you will have to change both if you do keep using it, just change it, the temp should be on the side, some replacements are round, also found in the back of tumble dryers, espares or someone will have them not expensive but judging by the ironers age you would be pushed to get a new element.
                      I have trained the missus to fold clothes off the line and not bother with ironing, id does work!
                      Two pet hates, ironing (ok shirts sometimes need a press) and volvo headlights being on all the time!
                      Think how many MWatts or barrels of oil have been wasted lighting up daylight and pressing clothes, i rekon the world reserves of oil would get consumed by them eventually, i remember my mum ironing with an iron on the stove, seemed to work ok, suppose folk with an aga or wood burner could do that
                      Mark
                      This machine is not that old and parts are available.

                      What is a hairpin element?

                      Thanks for the help.
                      Location: The Black Forest in Germany

                      How to become a millionaire: Start out with 10 million and take up machining as a hobby!

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                      • #12
                        a element rod bent into a "U" or hairpin shape.

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                        • #13
                          Examine the contacts for pitting from the arcing. Depending on how bad they are , this may or may not work.... Fllatten both contacts with a strip of 400grit (maybe 600?) held between them. Remove as little metal as possible, but they should be smooth when done.

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                          • #14
                            I ordered the replacement part today. They are quite proud of the little fella. $45!
                            Location: The Black Forest in Germany

                            How to become a millionaire: Start out with 10 million and take up machining as a hobby!

                            Comment


                            • #15
                              I think the sparks that would fly if this thread was about your wife would be more entertaining. Lol.

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