MOLD ACRYLIC PLEXI MAKE A PARABOLIC MIRROR CUT A CIRCLE SAW

Uploader: GREENPOWERSCIENCE
Video Description: http://www.greenpowerscience.com/
CUTTING A PERFECT CIRCLE ON A TABLE SAW. MAKE A PARABOLIC MIRROR COPYING A PARABOLOID. MAKE PERFECTLY BALANCED FLYWHEELS OUT OF WOOD. THIS METHOD FINDS THE PERFECT CENTER WITH NO MEASURING. THE SAFE WAY TO CUT A PERFECT CIRCLE ON A TABLE SAW.

Tags for this video: CIRCLE CRAFTS CRAFTSMAN CUTTING DIY FLYWHEEL HOBBIES ON PARABOLOID PERFECT ROUND SAW SOLAR SUN TABLE WOOD WOODWORKING
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that's insane, well ... ( 3 months ago by theycallmeken)

that's insane, well done :)

Thank you:-)!!! ( 3 months ago by GREENPOWERSCIENCE)

Thank you:-)!!!

Wow!! That is great ... ( 3 months ago by jasonguyperson)

Wow!! That is great! I was about to cut a regular mirror into tiny squares and glue them to an old satelite dish! haha fantastic!

yea that would work ( 3 months ago by mageguy3)

yea that would work

Great video. That's ... ( 3 months ago by dire67)

Great video. That's the only way to be. I have always had a problem with blind obedience to the established "facts". Good thing you didn't listen to your shop teacher. That kind of curiosity is also what it will take to exact the kind of change you and I are both looking for. Keep it up.

Fantastic video. ... ( 2 months ago by luvofcountry)

Fantastic video. Puts to shame the the technique I was experimenting with.
Bookmarked!

You can use ... ( 2 months ago by asenov83)

You can use satellite antenna, glue and aluminium foil.

Foil is okay, a ... ( 2 months ago by GREENPOWERSCIENCE)

Foil is okay, a true mirror film is a lot better. Satellite dishes work well.

Thank you:-) ( 2 months ago by GREENPOWERSCIENCE)

Thank you:-)

Me llena de alegría ... ( 2 months ago by cecilomar)

Me llena de alegría ver latinos preocupándose por el ambiente.
Mañana mismo voy a tratar de hacer el espejo, pero yo lo voy a mandar a cortar a la medida.
¡Éxito!

I want to use your ... ( 2 months ago by luvofcountry)

I want to use your principle of thermoforming the plexi mirror in conjunction with a true parabolic mold. While a dish is probably concave, I doubt it's a true parabola which would more accurately produce a focal point.
However, a natural parabola occurs in the surface of a liquid when it is spun. Deep space telescopes are now using a platters of spinning mercury as mirrors, and I wonder if the mercury can be replaced with a molding material (plaster?) that would dry into shape.

The mold could then ... ( 2 months ago by luvofcountry)

The mold could then be used to make several accurate mirrors, using your technique. While probably not of the highest optical quality for telescopes, they would be very suitable for solar energy production. When I get some extra money (LOL), I plan to build a spin-mold. Would be nice if a mold 3+ feet in diameter could be spun!

I don't think my ... ( 2 months ago by luvofcountry)

I don't think my last post got printed because I included a web link...
For those without access to table saws, McMaster-Carr (mcmaster "dot-com") has acrylic and plastic mirror disks in several thicknesses in up to 12" widths for $25.
Good luck to all.

I have the same ... ( 2 months ago by theunknownknows)

I have the same model oven. I only make chicken and meatloaf with mine, though.lol

:-) ( 2 months ago by GREENPOWERSCIENCE)

:-)

What are the ... ( 2 months ago by RetroTheory)

What are the different results you can get from a Parabolic Mirror than you can get from using a magnifying glass? Are Fresnel lenses the same as a magnifying glass in general?

They all produce ... ( 2 months ago by GREENPOWERSCIENCE)

They all produce the same results but the mirror is reflective. A Fresnel lens is basically a magnifying glass flattened. The rings are cut at different angles to redirect light to a focal point.

I'll recommend to ... ( 2 months ago by kurwinsky)

I'll recommend to use security glasses for cutting Plexiglas.

I have a home built ... ( 1 month ago by fly2000jtb)

I have a home built furnace, could the fresnel lens (38") that you have on ebay, be used to premelt aluminium cans? It did a number on a steel washer. Just tring to save money and, cut down CO2 from charcoal that heats my furnace.

Yes, the ... ( 1 month ago by GREENPOWERSCIENCE)

Yes, the temperature is enough to melt very small amounts of aluminum but not a can as it acts as a giant heat sink and is shiny. You can get 1 pound of aluminum up to 475 with the 38" spot lens. This will save you some heat. Do it in a crucible and you can get 3 pounds to 300 F or 1 pound to 700f.
Use your furnace to finish the job. Make sure it is tightly compacted or the lens will just burn the can vs heating it.

any idea on how to ... ( 1 month ago by pipersmitty87)

any idea on how to cook down a larger plexiglass mirror on a larger parabolic circle? like 36"

sound like george ... ( 1 month ago by w33dbluntz)

sound like george walsh amw

Can I suggest a ... ( 1 week ago by dustychode)

Can I suggest a much safer and faster way to cut through plexi and most sheet plastic. Just reverse a regular carbide blade. running the blade installed backward will prevent chiping and almost eleminate kick back.

where did you get ... ( 17 hours ago by treborly)

where did you get the plexi glass mirror?
you should try vacuum forming it. looked like it came out pretty good just with gravity though .
I had this idea a few months ago, i wanted to make a telescope with the mirror. Problem is the mirror is on the back side of the plexi glass, right?

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