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Crossbows - Everything about Building, Modding, and Using your Crossbow Gear

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2 posters

    Lets build a centrifuge! - Broken arm casting adventures.

    Ivo
    Ivo
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    Lets build a centrifuge! - Broken arm casting adventures. Empty Lets build a centrifuge! - Broken arm casting adventures.

    Post by Ivo Mon Feb 07, 2011 10:08 pm

    Good Day to you All,

    I think it's right about time I started filling the forums people rarely use. Twisted Evil

    Recently
    my lab decided it was too much of a hassle to get their castings done
    at a separate facility and being a nice guy that I am, I will be
    building a broken arm casting centrifuge station for them.

    Yeh...one of these suckers VVV
    Lets build a centrifuge! - Broken arm casting adventures. IMG_0150

    Those
    of you who remember my "horsebow thumb ring" cast-along from long ago
    on Bowyer's Den will surely recognize my rusty casting unit that I will
    be cleaning and bringing back into service...starting with building a new base to replace that nasty 50gal drum.

    So far these are the
    materials for the base, with the base partially assembled. It's all just
    duct work riveted together and bolted to a plywood disk to keep the
    shape for when I will be filling the base with cement.

    Lets build a centrifuge! - Broken arm casting adventures. Photo310
    Lets build a centrifuge! - Broken arm casting adventures. Photo210
    Lets build a centrifuge! - Broken arm casting adventures. Photo10

    Hopefully my "wing-it" engineering method doesn't fail me. king

    Ivo

    PS: That riveting gun thing is sick!!!



    Any one think of using it for crossbow building?
    Ivo
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    Post by Ivo Sat Feb 19, 2011 6:02 pm

    Lets build a centrifuge! - Broken arm casting adventures. 669485

    Poured the concrete a few days back.

    Lets build a centrifuge! - Broken arm casting adventures. DSC01208

    Everything is level and center Smile

    Lets build a centrifuge! - Broken arm casting adventures. Th_DSC01211Lets build a centrifuge! - Broken arm casting adventures. Th_DSC01209

    And there it is ready for anchor bolts (or what ever they are called)

    Lets build a centrifuge! - Broken arm casting adventures. DSC01215
    Lets build a centrifuge! - Broken arm casting adventures. DSC01216
    Basilisk120
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    Post by Basilisk120 Mon Feb 21, 2011 4:32 pm

    Hey thanks for the tutorial Ivo. I really am looking forward to more of this.
    Ivo
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    Post by Ivo Mon Feb 21, 2011 11:53 pm

    Yeh...I'm kinda living at work, so that's pretty much all I can post right now. Laughing

    I kinda rushed with cementing the anchor bolts forgetting all about the diameter of the centrifuge housing. Will measure it tonight and see.Lets build a centrifuge! - Broken arm casting adventures. 589208

    If wrong, I'll have to get medieval on it's ass with hammer and stone chisel...considering it's fiberglass reinforced concrete...I might be in for a treat. Razz

    Ivo
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    Post by Ivo Mon Jan 02, 2012 12:48 am

    Looking over the forum, I see so many great builds going on.....where am I? Damn it - stuck at work, that's where. Mad Razz

    I haven't smelled the sweet dusty workshop of mine in a long time, and with the holidays that just passed even forgot I had a home for a while...Ok, done complaining. Laughing

    Sitting at work does have some privileges - The casting machine is done...sort of. tongue

    I can cast with it, but there are issues that I'm still working out.


    • One problem is the Plywood base I used. When I poured the concrete, I didn't realize that it would expand so much that the plywood would bulge out to such extent that it would literally make the casting machine rock like one of those rocking dolls.
      Had to tap in some plastic shims (used in leveling door frames) to get everything balanced.
    • Second problem - The protective hood I bought for the centrifuge (despite the guy telling me that it fits my model) doesn't provide enough clearance for the unit.
    Lets build a centrifuge! - Broken arm casting adventures. Th_photo1-2Lets build a centrifuge! - Broken arm casting adventures. Th_photo2-2Lets build a centrifuge! - Broken arm casting adventures. Th_photo41-1Lets build a centrifuge! - Broken arm casting adventures. Th_photo31-1
    ...so the lid is going to be left off for now till I figure out a solid way to raise it at least an inch.


    • Third problem - the stand is too light/has too small of a footprint to be absolutely stable. This one happened mainly because I chickened out in making it too heavy...after all I'm on the second floor and don't want to be making any elevator shafts.
    Luckily my contractor friend stopped by and laughed at me a little - convinced me somewhat that the way it's standing (in the corner, between the bearing walls) I can make another one and put it on top of the one I built if I care.

    *buck-buck* Razz ...think I'll just weld up a box frame around it and throw a few sand bags in there, lol. Smile (reason for a metal frame - it's got to be all non flammable or fire dep. inspector will rip me a new one)

    Anyway,

    This is basically where I'm at right now...it works well, just a bit wobbly is all - shaking enough to make the tongs fall off the corner, but "functional" in every other way. Enjoy the flick. Smile



    Ivo

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