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  1. #1

    Default I'm having a problem with my Syncrowave 180, anybody ever seen this?

    I've been the proud owner of my Syncrowave 180 for 4 or 5 years now and I ran into trouble with it. I was welding some 1/4" steel @ about 120 amps, nothing too demanding. I welded off and on for about 10 minutes and then walked away from it for a while. I came back to it and that's when the trouble started.

    When I hit the foot pedal I get absolutely nothing. No arc, no gas. When I switch the machine from TIG to Stick (but with the TIG torch still hooked up), I get gas flow while I'm switching it, and when it is switched I can scratch an arc with the tungsten.

    I checked all the cable connections, everything is good. I powered down the welder and unplugged it for a minute or so, plugged it back in and that didn't help.

    I thought it might be the foot pedal. I tore it apart, it is a 5 wire pedal and there are two components in it. A limit switch and a 1K Ohm potentiometer. I checked the limit switch for continuity, it is good. I checked the resistance on the pot, it changes smoothly from 0-1K ohms across wires 1 and 2, and it changes smoothly from 1K-0 ohms across wires 2 and 3. It seems like this is right.

    Anybody ever have a similar problem or have any other ideas? My next step is to investigate inside of the welder but I don't really know what to look for.

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,678

    Default

    That "Limit switch" is the relay that turns the machines contactor and gas solinoid on and off. It may need to be adjusted if your not hereing the Click when you press the pedal.

  3. #3

    Default

    Quote Originally Posted by cruizer View Post
    That "Limit switch" is the relay that turns the machines contactor and gas solinoid on and off. It may need to be adjusted if your not hereing the Click when you press the pedal.


    My pedal could be different, it is not a relay in the pedal. It is a limit switch.
    It looks similar to this one: http://www.alibaba.com/sellinglead-g...showimage.html

    It has two wires going to it and they are in the NC position.

    I can hear it clicking when the pedal is assembled, so it is switching. That does help that I now know that it controls the contactor and gas solenoid, that's a good place to start when I tear into it.
    Last edited by cyclepartsmaniac; 06-02-2009 at 06:02 AM.

  4. #4
    Join Date
    Dec 2008
    Posts
    152

    Default

    We call them "micro switch" over here.

    Never heard of them as being a relay.
    But I guess components are referred to by different names depending on which country you are in.

    It may be clicking but is it actually working? as in triggering
    Have you metered the cable back to the machine?
    Checked plug front and back

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,678

    Default

    The name "Micro Switch" is actually a company owned by Honeywell. There are various manufacturers of these small "mechanical relays".

    We all say micro switch, as they were the first to introduce them.

  6. #6

    Default

    I have checked the switch in the pedal and it works as it should. Once again, it is not a relay. A relay is an electrical switch that is controlled by an additional circuit. Relays allow you to switch a high current circuit with a low current circuit. They require at least 4 wires. This switch has two wires, one input and one output. My guess is that there is a relay in the welder that this switch controls. Anybody else have any info on this? I'm really only looking for someone to point me in the right direction, or maybe give me a few possible scenarios of what I might find when I get inside the welder.

  7. #7
    Join Date
    May 2009
    Location
    Gulfport, Florida
    Posts
    440

    Unhappy Even welders have a thorn in the flesh

    Quote Originally Posted by cyclepartsmaniac View Post
    I have checked the switch in the pedal and it works as it should. Once again, it is not a relay. A relay is an electrical switch that is controlled by an additional circuit. Relays allow you to switch a high current circuit with a low current circuit. They require at least 4 wires. This switch has two wires, one input and one output. My guess is that there is a relay in the welder that this switch controls. Anybody else have any info on this? I'm really only looking for someone to point me in the right direction, or maybe give me a few possible scenarios of what I might find when I get inside the welder.
    Hey there cycle.. You said you checked the switches in the foot pedal and you found 5 wires. you checked 1 & 2 and you checked 2&3 did you ever unplug the pedal and check all the wires from plug to pedal for continuity.? plus check the male and female pins in the plug/socket.. It's probably some thing real simple and it was over looked. You will fine the cause take your time.... Bob

  8. #8
    Join Date
    Dec 2008
    Posts
    152

    Default

    As a matter of interest would you class a voltage switch as a mechanical relay?

  9. #9
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,678

    Default

    Releco relays and others have a test button that manually closes 2 poles in the relay. Is this a switch?

  10. #10

    Default

    If possible find a good working torch , plug it in to your 180, if it works than you know what to do. dont tear it into machine if you dont have to. I'm sorry if somebody already mentioned that.

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