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adatesman
Mar 1, 2009, 1:55 AM
Views: 57699
Registered: Jul 13, 2005
Posts: 3479
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Rschap writes:
In reply to: Would you believe I did all of this with a hand saw and a file? No really....   This has been fun and I look forward to next years competition; I've already come up with some ideas and will be more original next time. "The Webcam" Cam lobes: 1/4" black anodized 6061 aluminumShaft: 5/16" diameter 4130 chromoly round barEyes: 1/8" SS cable eyesCable: 1/8" diameter galvanized cable outside, 0.040" SS welding rod spun together insideBolts: 10-24 SS machine screwsTrigger: 6061 aluminumSprings: 0.032" diameter music wire The double cable system is to spread the load on the shaft. The camming angle o the lobes is 14 degrees. I've also made a flat surface on the tips of the lobe to avoid tipouts from overcamming, not really a problem when they're this size but on smaller cams I think it will pay off.
If you've been wondering what it is about the photos that doesn't seem quite right (no shadows, very subtle reflection under the cams), this pic gives away the secret. If you put something on a glass or lexan plate you can do away with most of the issues with shadows where you don't want them and have a lot more flexibility in positioning the piece. Unfortunately my plate was far from big enough for this cam....
EDIT- Sorry, got the names confused and had this posted as Cosmicharlie's instead of Rschap's. Fixed now. Also it seems my edit to the letter hid the joking about making it by hand... he cut the lobes on a waterjet machine, as discussed in the competition thread. Added a smiley to the text to help make it more obvious. Also can't seem to spell today... Oy.
(This post was edited by adatesman on Mar 4, 2009, 3:16 AM)
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Post edited by adatesman
() on Mar 2, 2009, 9:16 PM
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Post edited by adatesman
() on Mar 2, 2009, 10:52 PM
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Post edited by adatesman
() on Mar 3, 2009, 4:02 PM
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Post edited by adatesman
() on Mar 3, 2009, 4:05 PM
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Post edited by adatesman
() on Mar 3, 2009, 4:10 PM
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Post edited by adatesman
() on Mar 3, 2009, 5:07 PM
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Post edited by adatesman
() on Mar 4, 2009, 2:30 AM
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Post edited by adatesman
() on Mar 4, 2009, 2:33 AM
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Post edited by adatesman
() on Mar 4, 2009, 2:51 AM
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Post edited by adatesman
() on Mar 4, 2009, 3:16 AM
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