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Saturday with Brad's "other" P&H

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    bkahler
    Senior Member

  • bkahler
    replied
    Check your PM.

    Leave a comment:

  • MoreheadMachine
    Junior Member

  • MoreheadMachine
    replied
    Thanks! I appreciate it!

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  • bkahler
    Senior Member

  • bkahler
    replied
    I'm pretty sure I still have a pdf file on my computer. I'll check when I get home this evening and let you know.

    Brad

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  • MoreheadMachine
    Junior Member

  • MoreheadMachine
    replied
    Might be a bit of a leap hoping to get a reply to such an old post but you wouldn't happen to have a schematic for your P&H Welder you can send to me. I have a very similar one but I am missing the schematic.

    Leave a comment:

  • Brasco
    Senior Member

  • Brasco
    replied
    The schematic makes sense the way the meters are connected. Thanks for posting the schematic.

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  • bkahler
    Senior Member

  • bkahler
    replied
    Originally posted by vicegrip View Post
    I'll get to the schematic , but it'll be a day or so , need to focus on necessities for now

    Phil
    Phil,

    No hurry

    We're heading out of town thursday morning for my wifes grandfathers 97th birthday (at that age you celebrate everyone of them ). Won't be back until thursday next week and I'm pretty sure we will have minimal or no web access during that time.

    Thanks

    Brad

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  • vicegrip
    Senior Member

  • vicegrip
    replied
    I'll get to the schematic , but it'll be a day or so , need to focus on necessities for now

    Phil

    Leave a comment:

  • bkahler
    Senior Member

  • bkahler
    replied
    Originally posted by Brasco View Post
    Vice does come up with interesting questions. Wonder if the 0-50 meter reads arc voltage only, and is put in the circuit when the welder senses current on the output.
    Thanks Broccoli1 for the spell check ! Yogi would not be happy if he found out.
    Brasco & Vicegrip,

    The DAR-300 that I have a manual for which is slightly newer than the welder that Phil has shows a 100 vdc meter on the schematic. It shows it connected from the positive side of the recitifier to the output side (negative side of rectifier) of the stabilizing reactor. It should be reading voltage anytime you're selected for DC and the welder is turned on.

    Be interesting to see the schematic for Phil's welder.

    Brad

    Leave a comment:

  • Brasco
    Senior Member

  • Brasco
    replied
    Vice does come up with interesting questions. Wonder if the 0-50 meter reads arc voltage only, and is put in the circuit when the welder senses current on the output.
    Thanks Broccoli1 for the spell check ! Yogi would not be happy if he found out.

    Leave a comment:

  • vicegrip
    Senior Member

  • vicegrip
    replied
    Originally posted by bkahler View Post
    Phil,

    Were you reading the volts while welding or when idling? When idling it should be reading 68 volts which is the open circuit volts and while welding you should read 25 volts.

    The P&H that I have reads 68 volts in DC mode when idling or open circuit. I did not read the load volts because I was welding with it outside and the welder was inside the shop.

    Interesting mystery

    Brad
    I think it's doing what it's sposed to....the meter isn't looking for 80 volts !!
    Iy was reading 38 volts ideling
    ?????????????????????????????????????????????????? ????


    vicegrip
    Senior Member
    Last edited by vicegrip; 01-23-2007, 01:37 PM.

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  • bkahler
    Senior Member

  • bkahler
    replied
    Phil,

    Were you reading the volts while welding or when idling? When idling it should be reading 68 volts which is the open circuit volts and while welding you should read 25 volts.

    The P&H that I have reads 68 volts in DC mode when idling or open circuit. I did not read the load volts because I was welding with it outside and the welder was inside the shop.

    Interesting mystery

    Brad

    Leave a comment:

  • vicegrip
    Senior Member

  • vicegrip
    replied
    Originally posted by vicegrip View Post
    P.S. the info. plate says output 28 volts ...but the volt meter says 38 volts .....????
    and I looked thru my magnifier so I read it right .....is 38 to high ??
    Originally posted by vicegrip View Post
    there was still another thing I couldn't explane ....untill today !!

    I was puzzeling over the output voltage when I suddenly reallised 28 or 38 volts ??

    I went and looked Miller 330 _ 80volts ---Linde 305 _ 78volts????
    What the .......

    could be why it sounded different too ????
    more ??s & more ??s

    Phil
    Originally posted by Brasco View Post
    If you are measuring the
    open circuit voltage then the 28-32 might be low, Have your meter checked against a
    standard or other meter. Check the voltage when welding to see how low it goes. Some meters have a hard time measuring DC voltage with a lot of AC ripple intermingled with the DC, It appears that everything is alright voltage wise since you are getting good welds. I would be surprized if such an old machine would have a circuit to reduce the Open circuit voltage like the new welders do.
    Originally posted by bkahler View Post
    Other than a volt meter that wasn't reading right I wonder what would cause the voltage to be so low? Thats strictly a DC welder so the output is coming out of the selenium rectifier. Could that be a sign of a dying rectifier

    It appears the welder has a volt meter on the front, were you using that to read the voltage from?
    I'll go look again closer but I could swear the plate said output 28 volts , I know the meter said 38??

    what's on the plate on that pretty Ebay P&H ??

    AaHhhhhhhhhh!!!! Wear Me Out !!
    vicegrip
    Senior Member
    Last edited by vicegrip; 01-23-2007, 03:32 AM.

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  • bkahler
    Senior Member

  • bkahler
    replied
    Other than a volt meter that wasn't reading right I wonder what would cause the voltage to be so low? Thats strictly a DC welder so the output is coming out of the selenium rectifier. Could that be a sign of a dying rectifier

    It appears the welder has a volt meter on the front, were you using that to read the voltage from?

    Leave a comment:

  • Broccoli1
    Senior Member

  • Broccoli1
    replied
    Brasco- it's Berra

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  • Brasco
    Senior Member

  • Brasco
    replied
    Another great post by Vice, good camera and weld work there. If you are measuring the
    open circuit voltage then the 28-32 might be low, Have your meter checked against a
    standard or other meter. Check the voltage when welding to see how low it goes. Some meters have a hard time measuring DC voltage with a lot of AC ripple intermingled with the DC, It appears that everything is alright voltage wise since you are getting good welds. I would be surprized if such an old machine would have a circuit to reduce the Open circuit voltage like the new welders do.

    Leave a comment:

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