Kato SD70ACe frame

RBrodzinsky Jun 8, 2016

  1. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    Does anyone have a spare SD70ACe frame / mechanism they would want to part with? I was milling one for a sound decoder install, and had an OOPS moment (ok, the language was a lot more colorful than that).
     
  2. ns737

    ns737 TrainBoard Supporter

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    HI is the frame just broken or is it destroyed ? can you take a pic. of it. I mite be able to fix it for you.
     
  3. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    Here is what I did. Not sure there is any way to fix. The right frame half shows the marking of what I was attempting to mill out.

    20160609_120152.jpg

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    How it would go back together

    20160609_120235.jpg
     
  4. DCESharkman

    DCESharkman TrainBoard Member

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    Looks like the vibration from the cutting fatigued the metal. Not sure it would not happen again.
     
  5. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    Yeah, if / when I try this again, I would clamp differently. Put more support on the area being cut away, and less rigidity on the rest of the frame to try to eliminate the stress. Or, maybe just hand file, and not use Dremel.

    Also interesting to note that the right side of the frame actually has an extra support strut, exactly where the left frame snapped.

    At least, I got this loco in a "lot" purchase, of which the other items I was much more interested in (and at a very good deal). So, I am not totally broken up over this happenstance.
     
  6. ns737

    ns737 TrainBoard Supporter

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    that is repairable
     
  7. Ryan Wilkerson

    Ryan Wilkerson TrainBoard Member

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    What's the method of repair for something like this?
     
  8. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    If repairable, cool. I can finish milling out the area on the broken piece, and then go about repairing. As Ryan asks, what is the method?
     
  9. nightmare0331

    nightmare0331 TrainBoard Member

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    that's some nasty toolmark chatter. You're either not clamped well enough or are hogging too much material at once or both.

    I may have a left SD70ACe frame half sitting around...I'll take a look.

    Enjoy!

    Kelley.
    www.dufordmodelworks.com
     
  10. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    Yep - I lost the clamping; not really sure how. It may have been with a taking too much metal at once. This was my first true milling attempt, versus brute force Dremel filing, so learning (still with a Dremel)
     
  11. nightmare0331

    nightmare0331 TrainBoard Member

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    Double/triple check your setup, including making sure that the machine's gibs are adjusted and snugged down properly.

    Slow is smooth, smooth is fast... :)

    Enjoy!

    Kelley.
    www.dufordmodelworks.com
     

    Attached Files:

  12. ns737

    ns737 TrainBoard Supporter

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    wire and a special solder. I have repaired 10 frames. but right now I'am layed up. I just had hand surgery. so I'am out for 3 mt
     
  13. nscaler711

    nscaler711 TrainBoard Member

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    firstly only place I heard that was in the military, and they are absolutely right, slow is smooth, smooth is fast.
    basically means take time into what you are doing, that way you wont waste any time redoing it.

    secondly... That's a SDP40F frame... I know cause I'm one of those nut jobs that likes to tear down new locos...
    (can I send you my frame to mill? ;) )
     

    Attached Files:

  14. RBrodzinsky

    RBrodzinsky Staff Member TrainBoard Supporter

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    Hmm, if it is being reused in the SDP40F, there is a chance they may come back into stock at Kato USA.

    @nightmare0331 - Kelly, if you do have a frame half, please let me know.
     
  15. nscaler711

    nscaler711 TrainBoard Member

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    oh no the SDP40F is a new mechanism, I was just commenting on his photo!!
     
  16. nightmare0331

    nightmare0331 TrainBoard Member

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    You would be correct on both counts. That's where I picked that quote up.

    As a side note, here's that same frame (which is a SDP40F) with a Loksound Micro and sugar cube speaker installed.

    Enjoy!

    Kelley.
    www.dufordmodelworks.com
     

    Attached Files:

    nscaler711 likes this.

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