Leave it on or switch it off?

  1. badabec Member

    Messages:
    24
    Location:
    Essex UK
    Hello, my current project involves 30 seconds of welding then 10 minutes of faffing about, repeated over a couple of hours.
    Is it best to switch the welder off for the 10 minutes, then back on to weld then off again and so on or just leave the welder switched on?
    Or does it make no difference at all?
    It is a Sealey Super MIG 170
    Thanks
    Peter
     
  2. Rig Pig

    Rig Pig Member

    Messages:
    3,563
    Location:
    Narrwich! U.K.
    I leave mine on, it lets the cooling fan do it's stuff!
     
  3. Shedendman

    Shedendman Member

    Messages:
    3,819
    east sussex
    If at home and not used for 15-20 mins switch off,if its someones elses leccy piff:whistle:
     
    stuvy and badabec like this.
  4. badabec Member

    Messages:
    24
    Location:
    Essex UK
    Hello, thanks for the advice.
    Peter
     
  5. F.J.

    F.J. Member

    Messages:
    1,830
    Location:
    Manchester
    My Kemppi Minarc’s fan runs for around 5-10 mins after I have been welding. It’s like a reminder for me when it cuts off I knows the welders cooled down and I either know where I’m up to with the job to think if it’s worth switching off or not
     
    zx9 and eLuSiVeMiTe like this.
  6. chris y Member

    Messages:
    241
    Durham England
    Its using barely any electricity when turned on but not welding, so if its not convenient dont worry about it, but yes, always let it cool particularly if you have done some heavy work or welded for a long time.
     
  7. Morrisman

    Morrisman Forum Supporter

    One thing that’s irritating me slightly, why is the on/off switch on the back of Rtech mig welders?

    All the welding controls are on the front, but.....
     
    zx9, bletchmonster and Chillitt like this.
  8. WorkshopChris

    WorkshopChris Forum Supporter

    Messages:
    4,649
    Location:
    South East Essex
    Because it's of a generic Chinese welder design where several pence of cable is saved by not having to run the cable to the front then back to the transformer.:scared:
     
    Morrisman likes this.
  9. eLuSiVeMiTe

    eLuSiVeMiTe Forum Supporter

    Messages:
    10,016
    Location:
    Bedfordshire England
    Is the switch not part of the transformer like on a PC?
     
  10. johnser

    johnser Member

    Messages:
    1,839
    Location:
    North Cornwall
    Unless it's a fancy welder, it'll just be running the fan. You can check the idle wattage with a plug in meter if you're curious. I did mine yesterday coincidentally. 80w at idle.

    That's a pretty old welder though, more modern ones should be better.

    Convenience, cost, knowing it's properly cooled all play a part in decision!
     
  11. WorkshopChris

    WorkshopChris Forum Supporter

    Messages:
    4,649
    Location:
    South East Essex
    There are normally 2 ways its done, one cable comes in goes straight to an isolator then on to the contactor. Often a standard din rail mount main isolator as found in a domestic consumer unit. This is how the older Rtec tigs are i don't know about the newer machines.
    Another way used by some manufacturers main cable comes in straight to the main contactor, then a smaller cable is tapped off and goes to a small switch on the front panel that feeds the auxiliary transformer and powers the main PCB.
     
    eLuSiVeMiTe likes this.
  12. hotponyshoes Member

    Messages:
    1,711
    Location:
    Somerset. Uk
    A couple of my welders have a stand-by function.
    They have fan-on-demand anyway but after a while (adjustable) they go into standby and just show dashes on the displays.
    I dont know what else actually shuts off, I keep meaning to clamp it out at some stage and see if it saves any power or not!
     
  13. Ed. Member

    My welder is a huge 3 phase inverter MIG and when it's on but I am not actually welding with it, I think it uses about 40W of power, so at the present electricity charge it works out about AU$0.30 for 24 hours of being left on, so not even worth considering the cost of running it, switching it on and off probably uses way more electricity and most likely would have more potential to cause failure in the long run, so I just switch it on and leave it running till the job is done.

    Having said that I am not sure what the power drain is in the transformer type of MIG's when not actually welding, but I would still think that switching them on and off constantly might cause some issues down the road. Mine is also silent (fan on demand) so no noise to annoy me when working unlike my inverter TIG which has a constant loud fan and combined with the fan and pump in the water cooler, so I don't like leaving that one switched on if I can help it.
     
  14. dannyp Member

    leave them on here
     
    zx9 likes this.
Advertisements