PSN-L Email List Message

Subject: My First Lehman
From: "Gary Lindgren" gel@.................
Date: Sun, 8 Jun 2008 18:31:43 -0700


I have some pictures for the first Lehman. At this point I=92m just =
getting
familiar with it and learning how to set it up. I have 2 sets of =
crossbars,
one set is 1/8=94 SS dowel pins and the other is 1/8=94 hardened steel =
dowel
pins. So far I think I like the hardened steel better. The upper =
mounting
uses the idea from Ted, he suggested using a =BC-20 acorn nut. This =
worked
perfect, I drilled a .020=94 hole in the center to receive the .017=94 =
dia.
music wire. A nice snug fit. Then I use a =BC=94 dia. Si3N4 ball =
bearing. The
ball bearing grade is 5, so it is very smooth and very hard, much harder
than steel. So far I have been able to achieve just under 30 sec. =
resonant
period. I=92ll be using the Chapman magnet system for both the sensor =
and
damping. The Lehman is shown here
http://gelindgren.googlepages.com/lehman_6_8_08.jpg    The bearing =
detail:
http://gelindgren.googlepages.com/lehman_bearing_6_8_08.jpg  The upper
mounting: =
http://gelindgren.googlepages.com/lehman_upper_mount_6_8_08.jpg
and lower mounting:
http://gelindgren.googlepages.com/lehman_lower_mount_6_8_08.jpg =20

=20

Suggestions are welcome,

Gary

=20

=20

=20

=20

=20

Gary Lindgren

585 Lincoln Ave

Palo Alto CA 94301

=20

650-326-0655

=20

  =
www.blue-eagle-technologies.com

  cymonsplace.blogspot.com=20

=20

=20












I have some pictures for the first Lehman. At this = point I’m just getting familiar with it and learning how to set it up. I have 2 = sets of crossbars, one set is 1/8” SS dowel pins and the other is = 1/8” hardened steel dowel pins. So far I think I like the hardened steel = better. The upper mounting uses the idea from Ted, he suggested using a =BC-20 acorn = nut. This worked perfect, I drilled a .020” hole in the center to = receive the ..017” dia. music wire. A nice snug fit. Then I use a =BC” = dia. Si3N4 ball bearing. The ball bearing grade is 5, so it is very smooth and very = hard, much harder than steel. So far I have been able to achieve just under 30 = sec. resonant period. I’ll be using the Chapman magnet system = for both the sensor and damping. The Lehman is shown here http://gelin= dgren.googlepages.com/lehman_6_8_08.jpg =A0=A0=A0The bearing detail: =A0http= ://gelindgren.googlepages.com/lehman_bearing_6_8_08.jpg =A0The upper mounting: = http://gelindgren.googlepages.com/lehman_upper_mount_6_8_08.jpg =A0and lower mounting: = http://gelindgren.googlepages.com/lehman_lower_mount_6_8_08.jpg =A0

 

Suggestions are welcome,

Gary

 

 

 

 

 

Gary Lindgren

585 Lincoln Ave

Palo Alto CA 94301

 

650-326-0655<= /span>

 

www.blue-eagle-technologies.com

cymonsplace.blogspot.com 

 

 


[ Top ] [ Back ] [ Home Page ]