correction total is 1.21 pounds
--- In email@example.com, "Matt Rock" <mattihorn@i...> wrote:
> Hi Chris,
> I see your point as having the top plate heavier.
> My plate with the cups and magnets and the pivot is about 1.21
> pounds or roughly around 550 grams.
> It already sounds quite light (to me) and I might consider
> some brass plating which I can obtain. I can get lead as well, yet
> brass would seem to be safer (healthwise)
> I can give you the dimensions of the osc table (top) to see if you
> can think of anything I should consider.
> Equilateral shape of course. 10 inches on each side. Thickness of
> Mahogany wood = 3/4
> Cups, are aluminum (pop can filled with epoxy) spaced apart 5
> to each other, of course following the Star of David patterning
> Correction on magnet diameter: 2 -3/8ths, 1/4 inch thickness
> pivot: solid aluminum disk: 2 inch diameter and 3/8ths thickness
> All this totals 1/4 pound.
> I have been considering granite for the balls and I may have found
> someone who will make them for free. Finding the slabs of granite
> would be an interesting thing to consider. What about solid
> aluminum? I have plenty of access to this material. 2.7 grams per
> cubic centimeter.
> Mahogany is 545 kg/m^3
> Aluminum is 2560 kg/m^3 about 4.69 times the mahogany.
> With this in mind, a piece of equivalent dimension aluminum will
> give me about 5.6749 lbs of weight. this might be to much or I can
> lower the plate thickness to 1/2 inch for about 3.7794834 pounds.
> just really need to know what works and I would be in needing to
> calculate it perhaps working backwards from the magnets or just
> weight factor of the plate. 21.6 grams per marble.
> Downward pressure of the current setup (mahogany) is about 183
> per marble.
> So there is can be read from plate to marble as 8:1 ratio
> Summary: about 1.21 lbs for the top plate.
> marble is 21.6 grams or 0.04752 lbs
> curvature for pop can = unknown to me at this time. I can measure
> this using the mirror curvature duages that I have where I work
> Magnet strength = unknown. seem to be Barium type magnets. I don't
> have any means for this measurement at the moment.
> Perhaps this is 'best' guess, unless of course, Chris you can tell
> me if my current plate weight is sufficient or needs increasing.
> --- In firstname.lastname@example.org, "cfelton" <cfelton@c...> wrote:
> > Hi Matt,
> > What is important is, the weight of the top plate of the
> oscillator. This weight would be enough on it's own, but then
> would be no place to tap the energy. I sounds like your magnets
> large and strong enough for the job. I think weight might be an
> issue. I have added lead to the top plate to increase weight of
> mine in the past. The top plate is the weight that is put into
> motion. It's weight will help stabilize the entire device as it
> will always try to center itself with great force. I have see
> of granite fairly cheap, and all you have to do is cut it to size
> with a saw, then attach your cups to the plate. 1/2" to 1"
> thickness would be a good range.
> > Let me know on the material and weight of the oscillator plates.
> > -Chris Felton
> > ----- Original Message -----
> > From: Matt Rock
> > To: email@example.com
> > Sent: Saturday, April 10, 2004 2:08 PM
> > Subject: [hameltech] 11112 OSC table attraction magnet strength
> > Hi:
> > and if Chris Fleton is reading, can you please respond?
> > I need to know what the desired attraction magnet strength
> should be
> > and perhaps magnet spacing as pre the osc table.
> > My current situation has two 3 inch diameter donut magnets
> > about 1/2 inch from each other. It appears they aren't doing
> > attraction. I place 3 more stronger donuts on top of the osc
> > to see if this would improve things.
> > Should I be using one bottom donut and 3 top donut magnets to
> > achieve the desired attraction? And how rigid should this
> > be? For example, when I move the table by hand, should it not
> > to rest after say a few seconds or should this be delayed?
> > is takes about 20 sceonds for each setup of magnets for the
> > table to come to idle or rest. I would start the motion by
> > the table towards me and releasing. Then time it using my stop
> > watch. The movements are fairly regular, as the osc table is
> > to find some sort of equilibrium. The vibration intensifies
> > closer it gets near the ned of the time period. The magnets
> > obviously taking over the movement. The question is, how
> > how long should this duration be?
> > Thanks, and I hope....Chris, you're still willing to share
> > insights. I could use them!
> > Thanks,
> > Matt
> > Header Codes
> > 11111: Theory, untested Hamel ideas
> > 11112: Building and balancing, progress
> > 11113: David Hamel reports
> > 11114: Non-hamel mysteries and energies
> > OT: "Off Topic"
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