PowerCraft PCMIG135/09 Rebuild

  1. Rototype New Member

    Messages:
    4
    Location:
    UK
    Hi Guys,

    I'm just in the process of a small rebuild of my PCMIG135 (mainly Euro torch connector & Dinze Earth socket) - I've given up with trying to make the standard torch work with the Euro connector (splitting the power and gas was the problem) so I bought a MB-15, and I'm at a point where I need to wire in the gas solenoid (the gas connection is 6mm push-fit PU pipe - standardised throughout so this isn't a problem).

    The solenoid valve I have is a 12V one and there's a 12V transformer/power supply system on the circuit board, but I don't know if it's got enough spare juice in it to run the valve (it takes about 6.5W or 540mA) or whether I should wire in a separate power supply for it? The transformer is a ZX7-DY2-A 12V model and the regulator is a W08, which I know can handle 2A - any of you geniuses out there know the answer?

    I've got a separate high power (20A) 12V feed in the workshop (mostly for lighting) but I'd like the MIG to be self contained so as to make it a little more portable.

    As part of the rebuild I've moved the power input to a 16A socket on the back panel and added a 16A outlet socket to daisy chain the CT-312 off it (plasma/MMA/TIG). I'd also like to build a gas mixer chest to allow differing ratios of the main gasses to be used for different metals (and between the MIG and the TIG) - this would save me a lot of space and hassle in having to have multiple gas bottles of different ratios, if I've designed it right then I can just dial in the flow rates for a particular mix and start welding (I'm planning to have a 'mixing chamber' where the gasses can merge and hopefully come out evenly). Does anyone else have any experience of this (am I wasting my time even thinking about it or is it a good idea?)

    I'll see if I can put up a couple of photos of how I'm doing soon (if anyone's interested).

    Tim
     
    slim_boy_fat likes this.
  2. mike 109444

    mike 109444 Member

    Messages:
    4,069
    uk Bristol
    Just remember manufactures will use the minimum components they can get away with so there may not be much spare capacity on the transformer + bridge rectifier ect.
    and welcome BTW :hug:
     
  3. Rototype New Member

    Messages:
    4
    Location:
    UK
    Thanks Mike, I've just got the circuit board out of the welder to have a closer look at the components etc and remembered I found a circuit diagram for it that one of the other members posted a while ago (sorry, I can't remember who, but thank you whoever it was).

    Looking at the dimensions of the transformer I can't imagine it's going to put out much more than is required for the 2 relays it has to drive so it looks like I'm onto a secondary power unit. I'm tempted now to put a DC socket on the back and run it from the workshop supply but have a 12V power supply to plug into it when I want to use it away from it's 'home' position.

    I also managed to upgrade the wiring in the workshop with a 16A socket for the welder, photo attached.
    New socket Wiring.jpg
     
  4. Rototype New Member

    Messages:
    4
    Location:
    UK
    Got it all rebuilt now. I've yet to do any welding with it (although there are a couple of jobs coming up) but all seems to be working. Much tidier now as well. Front Completed.jpg In place.jpg New Sockets.jpg Rear View.jpg Wiring Progressing.jpg With New Friend.jpg
     
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