Miller Electric

Welding Discussion Forums

Home » Resources » Communities » Welding Discussion Forums
 
Miller Welding Discussion Forums - Powered by vBulletin

Results 1 to 10 of 10
  1. #1
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default Syncrowave 250- no spark at points

    Serial number- KG234930

    Can't get high freq spark- CR5 will not engage when remote is triggered.
    I have 2 remotes- both work with 2 identical Syncrowave 250's.

    Machine stick welds fine.

    2 Miller techs gave me my checklist methods-

    • Backfeed 115 volts (wall circuit) to low side of hi freq transformer.
    Worked! Beautiful blue sparks (clean, shiny- gapped.008)

    • switched PC1 board from identical, working machine- next serial number : )
    Working board didn't help CR5- suspect board controls donor machine.

    • switched CR5 from same machine-
    No joy- CR5 doesn't function in remote.

    • switched S3 switch-
    Same thing- nothing, nada- no hi freq sparks.

    What am I missing?

    Thanks, in advance.

    Mike
    Last edited by mjak; 07-17-2013 at 02:16 PM. Reason: Because I'm a dumb ass

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,419

    Default

    And the serial# is, umteen different diagrams.....

  3. #3
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default Kg234930

    Serial number added. My apologies- I know better.

    -------------
    Checked 14 pin receptacle- A to E,D,C,B. .2 volts ; (

    Gas valve cycles when control is switched from on to remote.

    Mike

  4. #4
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,419

    Default

    Thats a toughy, perhaps the on/off/ continuous switch is jammed. does the gas turn off post flow? Do you have the preflow option? Do you have both the output and heat controller switches in remote?

  5. #5
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,419

    Default

    Quote Originally Posted by mjak View Post
    Serial number added. My apologies- I know better.

    -------------
    Checked 14 pin receptacle- A to E,D,C,B. .2 volts ; (

    Gas valve cycles when control is switched from on to remote.

    Mike

    Don't bother checking for voltages, there isn't any, other than the 10 VDC for output control.

  6. #6
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default

    Does not have preflow or spot time.

    Both remote switches are on.

    Gas flow does turn off, depending on timer setting.

    -------------

    Do CR1 and CR2 affect hi freq?
    I could swap from working machines.

    How does hi freq receptacle/board function without power?

  7. #7
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,419

    Default

    0-10 volts DC on C,E,D for control A&B are contactor circuit and thats it.

    CR1 is only for dc tig so hf start only

    CR2 runs the gas solinoied


    So if CR5 is indeed working, switches are in remote, and your curcuit breaker is pushed in, you will have 115Vac to run your hf circuit.

    Its likely though that CR5 is not working because you have a damaged switch

  8. #8
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default

    I have changed hi freq 'on/off/continuous' And remote/amperage switches.
    As mentioned, also remote/output- all from a working machine.

    CR5 cycles when remote output is on/panel.

    CR2 never cycles- post flow works when remote output is on, then swiched to remote.

    CR1 cycles when remote output is on and pedal is held or pushed after CR5 kicks. Hi freq is set to 'start'/dc tig or continuous.
    CR1 does not release until output is switched to remote.

    I could try switches from another machine but ???

    -------------
    I have ordered new main switches. This one is not "mushy" but has a touchy spot that likes to be nudged.

    ------------

    Tech guide/ trouble shooting-

    ?Fuse F1 in rectifier SR2 circuit

    ?Check resistance and connections of High Frequency Intensity control R13; R13 is 1.5 ohms 10%.Replace R1 if necessary.

    Thank you for your patience : )

  9. #9
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default

    I realize the tech guide fuse referred to a later machine.

    Don't understand what R1 is re High intensity rheostat.
    -----

    Is there a way to jumper the contactor (S3 ?) switch so that bad switch can be proven?

  10. #10
    Join Date
    May 2013
    Location
    SW Missouri
    Posts
    13

    Default Update !

    The angels dance at the points : )
    Beautiful, solid, strong.

    Problem was in the remote circuit-
    Swapped working CR2, didn't help.

    Traced from CR2 back to PC2-
    Easy to see burned ribbon RC2-6/RC1-A.

    Swapped working PC2 assembly- voila !

    Many thanks to Cruizer for all the guidance.

    Mike

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Non-static method PhpQuickProfiler::getMicroTime() should not be called statically in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/pqp/classes/Console.php on line 77

Warning: Function split() is deprecated in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/footer.inc.php on line 62

Welding Projects

Special Offers: See the latest Miller deals and promotions.

Warning: Function split() is deprecated in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/footer.inc.php on line 137