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Thread: Duty Cycle

  1. #1
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    Default Duty Cycle

    I get the general idea about duty cycle, my machine is rated at 150A 40%,
    roughly 75A 80% etc.......

    I was explaning this to someone and they asked a good question, "how do you know when you are at the max of the duty cycle? Does it shut off?"

    I operate at less than 50A 95% of the time, I have only caused the fan to come on once.

    What do you do? Rely on luck or trust your internal clock?????? Or will the machine keep you from destroying it?????
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  2. #2
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    Default

    If you hit the limit due to overheating, the machine has it's own
    thermal protector, and it will trip out automatically.

    It's like using the house smoke alarm for a cooking timer-
    but the machine will protect itself from burning up if you're
    using it too hot & heavy.

    .
    "Gone are the days of wooden ships, and Iron men.
    I doubt we'll see either of their likes again".

    Circa 1920.
    Author:
    Unknown US Coast Guard unit Commander.

  3. #3
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    Default

    As blackbird said the machine will shut down when it too hot but thats usually late. You have the same machine I have and I just try to keep tabs on how long I weld in one shot. Now one neat thing is the fan on demand feature it is telling you when the machine is being worked. The fan on my machine has yet to come on once. Yes I have yet to push it hard. But soon.
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  4. #4
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    Default

    Not all machines have an auto off feature.....the ones that do are protecting them selves not letting you know you need to buy a new machine....like the thunderbolts they don't have one.....your sync does so no worries....run it as hard as you like...if it shuts off then let it cool off,turn it down or don't run it for that long of a time again at that amp......hitting the thermal protection 5 times a day for a month probably isn't good for it, but that would be letting you know you need a larger machine
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  5. #5
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    Default

    On my syncrowave 180, I will run the machine until the fan goes on. If I just need to do one quick thing, or don't want to stop what I'm doing I keep going. But then I'll stop and wait for the fan to turn off. I've had it reset maybe 3 times.

    On my Maxstar it's a little more iffy. Since I'm welding 130A on 110 it heats up pretty fast. When the fan comes on I know it's close to popping the breaker on the powerstrip. In bright sunlight the thing overheats faster.
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  6. #6
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    Default

    Quote Originally Posted by Winger Ed. View Post
    It's like using the house smoke alarm for a cooking timer- .
    Thanks, Ed. The coffee cleaned of the monitor screen nicely! After all these years, I should know not to drink anything and read posts at the same time....

    I don't worry about duty cycle, as I don't do anything that will either require or allow me to run a bead for 6 or 8 minutes! That's a lot of arc-on time for a MIG. I always need to either reposition myself or the parts at intervals much less than the duty-cycle periods.

    Stick welding is the same - you need to stop every time you burn up a rod. Those pauses add to your duty cycle.

    Hank
    ...from the Gadget Garage
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  7. #7
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    Default

    Quote Originally Posted by hankj View Post
    I don't worry about duty cycle, as I don't do anything that will either require or allow me to run a bead for 6 or 8 minutes! That's a lot of arc-on time for a MIG. I always need to either reposition myself or the parts at intervals much less than the duty-cycle periods.
    Running a bead that long will cause much more warpage than multiple shorter beads anyway.
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  8. #8
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    Default

    It doesn't take that long for my Dynasty's fan to come on. Usually I'll finish my weld for another minute or 2, then wait for the fan to go off. Like WingerEd said, thermal protection will protect your welder, but like the manula says, it'll hurt the machine in the long run if if does that a lot.
    I'm not late...
    I'm just on Hawaiian Time

  9. #9
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    Default

    Is Manula a Hawaiian God?
    Last edited by monte55; 03-31-2008 at 08:37 AM.
    Nick
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  10. #10
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    Default

    lol !!!!!!!!!!!!!!! sorry!!!!!! MANUAL
    I'm not late...
    I'm just on Hawaiian Time

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