PSN-L Email List Message
Subject: Re: Magnets
From: Bob McClure bobmcclure90@.........
Date: Sat, 27 Nov 2010 17:45:22 -0500
My favorite magnets are 50x18x6 mm Nd block magnets sold by Gaussboys.com
for $5.50 each. See page
http://www.gaussboys.com/ndfeb-magnets/B5006.html
For these, you need 3in x 2in x 1/4 inch pole plates. I agree with Kaye that
smallparts.com is a good source for these.
For further details on my magnet and coil designs, see
http://sites.google.com/site/bobmcclure90/horiz
I am very pleased that Chris is again participating with advice.
Bob
On Sat, Nov 27, 2010 at 1:49 PM, Kay Wyatt wrote:
> 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
>
> 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=BX0X02
>
>
> 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=BX084
>
> 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 -----
> *From:* Christopher Chapman
> *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
>
>
>
>
>
My favorite magnet=
s are 50x18x6 mm Nd block magnets sold by Gaussboys.com for $5.50 each. See=
page
http=
://www.gaussboys.com/ndfeb-magnets/B5006.html
For these, you need 3in x 2in x 1/4 inch pole plates. I agree with Kaye=
that smallparts.com is a good=A0 sou=
rce for these.
For further details on my magnet and coil designs, se=
e
http://site=
s.google.com/site/bobmcclure90/horiz
I am very pleased that Chri=
s is again participating with advice.
Bob
On Sat, Nov 27, 2010 at 1:49 PM, Kay Wyatt
<kwyatt@.............>=
; wrote:
Chris (and Ed),
=A0
It is so wonderful to have you back=20
online!!!!!
=A0
I think that you use those magnets for your dampi=
ng=20
assembly.=A0 Didn't Ed want info on your sensor assembly?=A0 If so, Ed=
=20
might look at the following website on your design at
=A0
=A0
This webpage talks about your magnetic damping de=
sign, but=20
it also has the design for your sensor.=A0 For the sensor, you use=A0four=
=20
1"x1"x1/8" NdFeB magnets.=A0 I bought mine at K&J Magnet=
ics=20
at:
=A0
=A0
If Ed wants to also use your magnetic damping des=
ign, I=20
found your 1"x1/2"x1/4" magnets at
=A0
For the steel plates, I used www.SmallParts.com.=A0 They cut the=
=20
plates to the exact size I wanted.=A0 It cost a bit more, but it was sure=
=20
nice not to have to cut it myself.
=A0
Chris ... I'm so happy to have you back!
=A0
Kay Wyatt
=A0
=A0
=A0
----- Original Message -----
Sent: Saturday, November 27, 2010=
6:59=20
AM
Subject: Re: Magnets
Subject: Magnets
www.jclahr.com/science/psn/chapman=A0for=20
drawings of my designs. I use 1" x 1/2" x 1/8" NdFeB bar m=
agnets, magnetised=20
through the large faces. Two 1/4" thick mild steel backing plates ar=
e 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 opposi=
ng plate.=20
The plates are mounted on 1/4" OD zinc plated mild steel bolts. This=
is very=20
effective.