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Thread: The OT thread V1

  1. #2841
    yeah extrusion probably the best. if it was steel gun drilling. aluminum extrusions should hit that tolerance ok.
    social conservatism: the mortal fear that someone, somewhere, might be having fun.

  2. #2842
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    Quote Originally Posted by Nobody View Post
    Good, in that its closer. Good in that Hell's Survivors is a nice fiekd (the last time i was there, 14 years ago). Good that the field was set up big games like this from past experiences (Tippmann Challenge for one).

    Bad, in that i have no clue as to how they can fit all the venders on the field. Bad in that its decentralized for flights and people flying in, bad in that the field has less field props/structures compared to CPX (again, since i was there last). Bad in the fact that even moving the game because of factors unrelated to the field and beyond the organizers control, that it will mean people will not show up because it is not CPX.

    Hard to say at this point. Least they are trying to get ahead of this before the spring (or even officially winter for that matter). But as soon as venders pull out or not even show, that will be the determining factor to how good or bad the game will be.
    It looks like there won't be a tournament at the event so maybe there won't be as many vendors, or vendors bringing smaller booth setups? On that note though, I wonder how will they handle parking?

    It doesn't look too inspiring that they have huge clearings taking up the roughly central third of the park.

    Quote Originally Posted by cockerpunk View Post
    LL outgrew CPX after about 6.
    QFT

  3. #2843
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    Quote Originally Posted by ironyusa View Post
    Extrusion finished with broaching?
    Yeah, we only need 1.5 meters (x10?) and I was trying to avoid the 750 lbs minimum order buuuuut...

    Looks like we're gonna have a lot of scrap
    "Neutrality helps the oppressor, never the victim. Silence encourages the tormentor, never the tormented. Sometimes we must interfere. When human lives are endangered, when human dignity is in jeopardy, national borders and sensitivities become irrelevant." -Elie Wiesel
    I work for the company building the Paragon...once we figure out a name

  4. #2844
    http://www.pbnation.com/showthread.php?t=5819161

    You lurker guys heads up someone is a nutcase. Wow some customers

  5. #2845
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    Got it taken care of, thanks guys.
    "So you've done this before?"
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  6. #2846
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    Quote Originally Posted by PBSteve View Post
    Problem at work:

    I need a 1.5 meter long tube in 6063-T5, with a 6mm ID, and very tight tolerances on that ID (using the OD as a datum, the ID can't get out of round by +/- 0.002" over the length). Any suggestions for how to cut it? Seems like an ideal candidate for gun drilling.
    Missed this before but we did some acoustically precise pieces a little shorter than that using EDM (and I suspect precision @ depth is a big limitation for wire EDM). However, that was in 2 pieces and it was really freaking expensive. No contacts for gun drilling.
    "So you've done this before?"
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  7. #2847
    Wow, wire EDM'ing anything close to 1.5 m sounds freaking expensive.

    Is it possible to pull (opposed to the conventional "pushing") a reamer or hone through a tube? I'd imagine it'd be self-centering so you should be able to hit your tolerance relatively easily, but idk if that'll require expensive specialized tooling.

  8. #2848
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    I recall it coming to about $35k all told.

    The result was functionally equivalent from SLA hardware and a python waveform analysis/transfer function script i wrote myself to a $100k build using a bruel & kjaer DAQ system and EDM'd brass hardware.
    "So you've done this before?"
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  9. #2849
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    In my research I did find that pull boring with a gun drill is a thing. I think the trick for us will be the surface finish, 200nm Rs requirement is brutal. We're going to try and flow polish it but apparently the length is going to mean custom equipment.

    Expensive.
    "Neutrality helps the oppressor, never the victim. Silence encourages the tormentor, never the tormented. Sometimes we must interfere. When human lives are endangered, when human dignity is in jeopardy, national borders and sensitivities become irrelevant." -Elie Wiesel
    I work for the company building the Paragon...once we figure out a name

  10. #2850
    Quote Originally Posted by PBSteve View Post
    In my research I did find that pull boring with a gun drill is a thing. I think the trick for us will be the surface finish, 200nm Rs requirement is brutal. We're going to try and flow polish it but apparently the length is going to mean custom equipment.

    Expensive.
    im pretty familiar with R terms, but Rs is not one of them. you mean Rrms or Rsk??
    Last edited by cockerpunk; 12-22-2017 at 12:25 AM.
    social conservatism: the mortal fear that someone, somewhere, might be having fun.

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