Table Saw Nickel Test?

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  • phrog
    replied
    Wow, 35 Posts for a single nickel. Did I ever get my money's worth!
    Richard

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  • Stick
    replied
    quote:Originally posted by LCHIEN


    Uh oh, don't get me thinking too much on this.

    As such it's a qualitative test.
    Because vibration is 3-D (X, Y and Z-components)
    Z-vibration alone in excess of 1g (32 ft/sec/sec) will bounce the coin and set it flying.
    But X axis Motions (perpendicular to the face of the standing coin) exceeding in amplitude half the width of the coin will cause the coin to fall over(making the center of gravity move outside the footprint of the coin)... lessee Accel = second derivative of (.037" sin 2 x Pi x 80hz x t)...

    OK, this is even making my head hurt...
    Oh come on now, everyone knows engineers even dream in gobbledy-gook!

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  • Stick
    replied
    quote:Originally posted by LCHIEN



    Now with the BT3, I've become real bad and leave all manner of scales, digital calipers, marking devices, cutoffs, finished and upcoming workpieces, clamps, etc. on the saw table when I'm working. They just seem to stay there.
    You and me both! My outfeed table top is a full sheet of MDF, plus I have the full length wide table on it, and the whole thing is normally covered in stuff. It involves a major cleanup to actually make a cut on a large piece, but I'm sure glad the capability is there!

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  • drumpriest
    replied
    I'm not surprised that the nickel worked for you phrong. As I said, I got it to work with a dime. The hard part was getting the dime to stand up in the first place, but cycling the saw on and off (letting it come to full speed as well) didn't make it budge.

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  • Scottydont
    replied
    I thought was when you purchased a new tool that was so expensive, the wife puckered so bad you could place a nickle in the crack of her a$$ and it would stay put?

    At home wise cracks (ah-hah another funny!) like that get me kicked out into the shop. [)]

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  • Knottscott
    replied
    quote:Originally posted by BobSch

    28 post out of one nickel? Who'da thunk it.
    We all had to throw in our 2 cents... [^]

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  • LCHIEN
    replied
    quote:Originally posted by phrog

    Okay, I finally got around to trying the nickel test and my saw passed. Now, what do I do?
    Richard
    Pat yourself on the back for a fine purchase, congratulate yourself, brag to the wife, and sleep well tonight.

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  • phrog
    replied
    Okay, I finally got around to trying the nickel test and my saw passed. Now, what do I do?
    Richard

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  • BobSch
    replied
    28 post out of one nickel? Who'da thunk it.

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  • Hellrazor
    replied
    Bob, epoxy works better..


    Not that i did that or anything...

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  • BrazosJake
    replied
    LMAO @Larry,

    I dunno about you guys, but I doubt if I could stand a nickel on edge on a tool even when it's not running:-)

    After balancing that nickel on edge, scrounge up another $1.95 and head to the nearest Dunkin Donuts, where the nickel trick and $2.00 might get you a cup of coffee (of course the gas to get there may require a second mortgage on the house).

    Leave a comment:


  • BobSch
    replied
    quote:Originally posted by Dustmight
    The dime test works best with Superglue...it barely shows up either, so no one will know. [)]
    Oh, Oh. Looks like we're getting into the quarter-superglued-to-the-floor-outside-the-cafeteria time. [:0][:0]

    Leave a comment:


  • Knottscott
    replied
    quote:Originally posted by drumpriest

    ok, I just ran the nickel test, past with flying colors. So I got curious, I tried the dime test. The dime was hard to get to stand upright, and fell almost immediately when I turned on the saw.

    Then I realized why, I didn't have the guard on the blade, the wind from the blade blew it over. After I put the shark on, the bt passed the dime test.

    The dime test works best with Superglue...it barely shows up either, so no one will know. [)]

    Leave a comment:


  • jwaterdawg
    replied
    quote:Originally posted by LCHIEN

    quote:Originally posted by wassaw998

    .. I guess, a really smart person would stand a nickel on edge, and then determine how much / type of vibration actually was needed to knock it over, and then make some sort of a statement to the validity of the test to begin with...
    Uh oh, don't get me thinking too much on this.

    As such it's a qualitative test.
    Because vibration is 3-D (X, Y and Z-components)
    Z-vibration alone in excess of 1g (32 ft/sec/sec) will bounce the coin and set it flying.
    But X axis Motions (perpendicular to the face of the standing coin) exceeding in amplitude half the width of the coin will cause the coin to fall over(making the center of gravity move outside the footprint of the coin)... lessee Accel = second derivative of (.037" sin 2 x Pi x 80hz x t)...

    OK, this is even making my head hurt...
    80 hz? At first I was thinking "80 Hz?, why not 60Hz". Oh yeah, spindle RPMs are 4800 RPM = 80Hz. So, a simple quick fix to all TS's to ensure they pass the $0.05 test is to leave the saw off.[)]

    Leave a comment:


  • crokett
    replied
    Loring,

    It is making my head hurt too. I look at it in a much simpler way: Is there enough vibration there for you to notice and/or make cutting uncomfortable and/or affect the accuracy of the cuts?

    Leave a comment:

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