02-23-2012, 06:08 PM #1
Edge knife suspension - construction details
Hi to all.
After searching the Web for long time with no success I decided to post here.
My interest is focused on the electronics side of some tests to be carried out on a free pendulum which I need built by a machinist. I lack the tools (and the dexterity for that!).
Some refined construction would be excellent but not to the point of making this a costly attempt.
Having elected an edge knife suspension, is it anyone kind enough to give the details of shape / sizes / angles of the V groove and the knife? My pendulum is planned to be about 1 m long with a weight, all in all, between 1 and 4 Kg.
Of course a suggestion on appropriate materials for the suspension (trying to avoid spending too much $$$) would be nice as well.
I expect the test to last one year at maximum.
I would appreciate concrete data, if at all possible, supported by a simple sketch.
Gracias for the time you will spend reading this. (No pun intended)Agustín Tomás - In theory, there is no difference between theory and practice. In practice, however, there is
02-24-2012, 04:22 AM #2
Re: Edge knife suspension - construction details (By: atferrari)
This very special clock uses Tungsten carbide for the knife edge with invar for the blocks. See opposite figure 1 http://www.stevecaseydesign.com/W5%20doc.pdf
Here is a thread about knife edge suspension: http://mb.nawcc.org/showthread.php?5...0suspen%20sion
The blocks should be gimbal mounted so they can self align to the knife edge. Agate is used as the blocks on high grade clocks.
02-24-2012, 04:41 AM #3
Re: Edge knife suspension - construction details (By: tok-tokkie)Agustín Tomás - In theory, there is no difference between theory and practice. In practice, however, there is
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