PSN-L Email List Message

Subject: Re: Magnets
From: "Kay Wyatt" kwyatt@.............
Date: Sat, 27 Nov 2010 10:49:48 -0800


Chris (and Ed),

It is so wonderful to have you back online!!!!!

I think that you use those magnets for your damping assembly.  Didn't Ed =
want info on your sensor assembly?  If so, Ed might look at the =
following website on your design at=20

http://www.jclahr.com/science/psn/chapman/lehman/index.html

This webpage talks about your magnetic damping design, but it also has =
the design for your sensor.  For the sensor, you use four 1"x1"x1/8" =
NdFeB magnets.  I bought mine at K&J Magnetics at:
http://www.kjmagnetics.com/proddetail.asp?prod=3DBX0X02


If Ed wants to also use your magnetic damping design, I found your =
1"x1/2"x1/4" magnets at
http://www.kjmagnetics.com/proddetail.asp?prod=3DBX084

For the steel plates, I used www.SmallParts.com.  They cut the plates to =
the exact size I wanted.  It cost a bit more, but it was sure nice not =
to have to cut it myself.

Chris ... I'm so happy to have you back!

Kay Wyatt



  ----- Original Message -----=20
  From: Christopher Chapman=20
  To: edwianni1@........... ; psnlist@.................
  Sent: Saturday, November 27, 2010 6:59 AM
  Subject: Re: Magnets


  Subject: Magnets

  Chris, in a recent email to the PSN list you mentioned that you were =
using four NdFeB magnets in your "pickup" setup. Can you tell me the =
number/size of these magnets and are they in any special configuration? =
Thanks, Ed.

  Hi Ed,

      Check out www.jclahr.com/science/psn/chapman for drawings of my =
designs. I use 1" x 1/2" x 1/8" NdFeB bar magnets, magnetised through =
the large faces. Two 1/4" thick mild steel backing plates are provided =
with the magnets mounted in N/S pairs with the 1/2" ends adjoining. The =
2" long N/S pair on one plate is opposed by a 2" S/N pair on the =
opposing plate. The plates are mounted on 1/4" OD zinc plated mild steel =
bolts. This is very effective.

      Regards,

      Chris Chapman









Chris (and Ed),
 
It is so wonderful to have you back=20 online!!!!!
 
I think that you use those magnets for your = damping=20 assembly.  Didn't Ed want info on your sensor assembly?  If = so, Ed=20 might look at the following website on your design at
 
http= ://www.jclahr.com/science/psn/chapman/lehman/index.html
 
This webpage talks about your magnetic damping = design, but=20 it also has the design for your sensor.  For the sensor, you = use four=20 1"x1"x1/8" NdFeB magnets.  I bought mine at K&J Magnetics=20 at:
http://w= ww.kjmagnetics.com/proddetail.asp?prod=3DBX0X02
 
 
If Ed wants to also use your magnetic damping = design, I=20 found your 1"x1/2"x1/4" magnets at
http://ww= w.kjmagnetics.com/proddetail.asp?prod=3DBX084
 
For the steel plates, I used www.SmallParts.com.  They = cut the=20 plates to the exact size I wanted.  It cost a bit more, but it was = sure=20 nice not to have to cut it myself.
 
Chris ... I'm so happy to have you = back!
 
Kay Wyatt
 
 
 
----- Original Message -----
From:=20 Christopher=20 Chapman
To: edwianni1@........... ; psnlist@.............. =
Sent: Saturday, November 27, = 2010 6:59=20 AM
Subject: Re: Magnets

Subject: Magnets
Chris,=20 in a recent email to the PSN list you mentioned that you were using = four NdFeB=20 magnets in your "pickup" setup. Can you tell me the number/size of = these=20 magnets and are they in any special configuration? Thanks, Ed.   Hi=20 Ed,      =20 Check out www.jclahr.com/science= /psn/chapman for=20 drawings of my designs. I use 1" x 1/2" x 1/8" NdFeB bar magnets, = magnetised=20 through the large faces. Two 1/4" thick mild steel backing plates are = provided=20 with the magnets mounted in N/S pairs with the 1/2" ends adjoining. = The 2"=20 long N/S pair on one plate is opposed by a 2" S/N pair on the opposing = plate.=20 The plates are mounted on 1/4" OD zinc plated mild steel bolts. This = is very=20 effective.      =20 Regards,      =20 Chris Chapman  
 

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