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need help igbts welder

Discussion in 'Electronic Design' started by kidkv, May 30, 2006.

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  1. Do you have an AC stick welder? Like a buzzbox? Is that right?

    What kind of HF unit do you have?

    i
     
  2. XR-2206 is very easy to use and does exactly what I wanted. (variable
    frequency with SEPARATELY controlled duty cycle).

    i
     
  3. What's the welder?
    Well, all that doodads and little thingies are going to add up
    significantly, espoecially when they start blowing up and need to be
    replaced.

    I am not trying to dissuade you from your project, I am doing
    something very similar myself, just want to share my experiences.

    I do have money to blow (and try to finance my activities by reselling
    stuff on ebay rather than tap into family finances), but, making AC
    square inverter was not a very cheap project.

    i
     
  4. kidkv

    kidkv Guest

    yes i do have buzzbox 30amps to 225amps and have done welding with it
    and the HF box was made from a circuit from yahoo boards it is just
    like a tesla coil so i no that ot is safe becoz i have bulit a tesla
    coil and i have been welding with the tig torch for 1 year now the way
    i have it
    and how did you like the web site that i put up ??????? and all of it
    to build it does not cost much
     
  5. kidkv

    kidkv Guest

    yes i do have buzzbox 30amps to 225amps and have done welding with it
    and the HF box was made from a circuit from yahoo boards it is just
    like a tesla coil so i no that ot is safe becoz i have bulit a tesla
    coil and i have been welding with the tig torch for 1 year now the way
    i have it
    and how did you like the web site that i put up ??????? and all of it
    to build it does not cost much
    the welder is an ac buzzbox that now setup for dc and it cost me not a
    thing it was free
    and i also have a carbon arc thoch thats how this all started from...
    and i have a pland to build a plasma cutter 4 diodes to igbts to HF box
    to torch that is just some thing to think about
     
  6. So, how does the stuff work now? I am a little confused. Does it weld
    well? Usually, TIG welding requires higher open circuit voltages than
    seen on buzzboxes. Are your arcs good? What about your HF unit?

    I am not sure what website you are referring to, I would love to look
    at your website if you have one.

    i
     
  7. kidkv

    kidkv Guest

    yes it does weld real good for a 220volt welder... open circuit voltage
    is 90v to 120v..
    the HF unit works on dc only but it "will not work on ac" has some
    thing to do with the HF
    unit being 120Volt and the welder being 220volt.. the HF unit will
    start at 30 amps and the welder has a high side and a low side on the
    out put..
    this was the site http://www3.telus.net/public/a5a26316/TIG_Welder.html

    and i do paln on puting up a site as soon as i get it done ....
    and the caps would get hooked up to G2 and E2 on the igbts they are the
    same that you
    did your first setup with MG200Q2YS40

    the site has the circuit that iam useing.
    the datasheet for the IR2110 does not have that much to go on :-((
     
  8. kidkv

    kidkv Guest

    yes it does weld real good for a 220volt welder... open circuit voltage
    is 90v to 120v..
    the HF unit works on dc only but it "will not work on ac" has some
    thing to do with the HF
    unit being 120Volt and the welder being 220volt.. the HF unit will
    start at 30 amps and the welder has a high side and a low side on the
    out put..
    this was the site http://www3.telus.net/public/a5a26316/TIG_Welder.html

    and i do paln on puting up a site as soon as i get it done ....
    and the caps would get hooked up to G2 and E2 on the igbts they are the
    same that you
    did your first setup with MG200Q2YS40

    the site has the circuit that iam useing.
    the datasheet for the IR2110 does not have that much to go on :-((

    LOOKED on welder shorted 30v 25v open 80v but that whent up with the
    diodes on it and it is a single phase 220volt
    and the cap that i have on it are 2400uf 450volt and ther are 2 of them
    for 4800uf could not use tig with out them...
     
  9. Sounds very interesting. Would love to see your welds and setup.

    i
     
  10. kidkv

    kidkv Guest

    i will try to get a web page up as iam doing this
    so what do you think of that guys setup ????
     
  11. I am not completely sure that he has a finished working welding
    machine. I did not see any pictures of his welds. I have insufficient
    expertise to say whether it is a good or bad setup.

    Myself, I have a little bit different philosophy, due to my own much
    more limited expertise compared to him. I do not try to reinvent the
    wheels and I try not to use any dumpster components (MOTs). Hence, my
    use of off the shelf equipment like a firing board and existing
    3 phase welder, microcontroller instead of relay schematics, etc.

    I have a welder now that is working, in a limited sense, but it makes
    pretty cute stick weld beads.

    i
     
  12. kidkv

    kidkv Guest

    i have sent him emails on it and he has been nice on alot of the things
    that i have asked
    him on. and looking at the datasheets on the ic chips i can see how it
    works and i can not get the stuff to program pic chips!! I dont like
    them that much becoz programing is something that i do not
    get!!!!!!!!!!!
     
  13. Yes, definitely, he is nice and knowledgeable.

    As far as programming, I chose this device as the controller:

    http://cubloc.com/product/03_02cusb22r.php

    You can see how it looks on my control board:

    http://igor.chudov.com/projects/Welding/11-New-Rectifier/panel-0.jpg

    here's my source code (in progress):

    http://igor.chudov.com/projects/Welding/11-New-Rectifier/source.txt

    I am a computer programmer, so I write code all day long.

    The relays click at appropriate moments (based on "faking of inputs").

    i
     
  14. kidkv

    kidkv Guest

    thats nice BTW how much did it cost??? that is the big thing for me you
    would think that
    the price on the stuff would go down but not much from what i have
    seen. And i just like doing this stuff with my hands. i just cant sit
    at a computer all day i have to get up and do stuff!!!!!!!!!! i have
    been thinking about get a programer but they just cost to much.
    one thing i can do that is to fix windows xp if it gives me a problem
    by useing ms dos and i can delete files that wont let you delete them
    out :)
     
  15. IIRC, the controller cost $102.50, plus some amount for the LED
    display.
    For me, I also planned on just using a bunch of relays, time delay
    relays etc.

    Then I realized that I do not yet know the details of some welding
    processes such as MIG and plasma cutting. Plus, I realized that it
    would be nice to have some features like pulsed TIG, etc.

    With a microcontroller, making changes and implementing these features
    amounts to simple programming in BASIC. Whereas with relays, it is a
    major undertaking to make any changes.

    i
     
  16. kidkv

    kidkv Guest

    you will like this he sad that he put in time delay relays for the
    stuff to come up to temp and i do not see how that could be.. temp
    should not be problem when you see pepole use it out side???? and how
    long of a time should you wate for it to come up to temp????

    on this note i have fixed some stuff like 2 tv's 13" and a 26" the 13"
    has a bad ic chip in it
    and the 26" had a bad cap.. two motherboards that had bad caps the
    caps in the boards
    whear esey to see shit they came out with a pull. and one guy that
    builds computers sad that repalceing the would not work.
     
  17. I am sorry, I did not understand what you wrote.

    i
     
  18. kidkv

    kidkv Guest

    this is what he sad "" which simply put allows a few seconds for the
    various power
    supplies and TTL chips to normalize and become stable before the rest
    of the
    circuitry can be activated, so erronious state conditions can be
    avoided on
    the control board.""

    that should help
     
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