RE: Ryobi Bench Top Grinder ?? In Sync??

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Lannis, Ryan (Ryan) by way of Terry Fritz <teslalist-at-qwest-dot-net>" <lannis-at-lucent-dot-com>


 >>     I just finished my SRSG, I haven't used in tesla coil service as of
yet
 >>but I plan I on very soon. I used the same ryobi bench top grinder except
 >>mine was gold and I got it from home depot as well. What you have to do is
 >>make the motor sailent ploe synchronous this can be accomplished by
grinding
 >>4 flat spots on to the armature.

Noland did you happen to take any pictures of your grinding work?  I would
like to see it.  I have heard or 2 flats being grinded into the armature,
but never 4.  How do you know how deep and where to grind away?

Can anyone recommend a website for me to learn more about why grinding flat
spots make a motor synchronous?  I have never fully understood why this
works.  I am very curious!

Thanks
Ryan Lannis
Ayer, Massachusetts




----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, May 19, 2003 7:11 AM
Subject: Ryobi Bench Top Grinder ??


  > Original poster: "Lannis, Ryan (Ryan) by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <lannis-at-lucent-dot-com>
  >
  > Hello All,
  >
  > I want to build a new Spark Gap, I have been considering a
  > Synchronous Spark Gap.  I was looking for a cheap motor when I thought of
  > Bench Top grinders.  Home Depot sells a cheap $40 Ryobi 6" grinder that
  > claims to run at 3600 RPM, here is a link.
  >
http://www.ryobitools-dot-com/product/product.asp?prodid=136&prodcat=4&toolcat=3
  > Does it seem odd that the grinder motor runs at 3600 RPM?  By using two
  > spinning disks, would this help quench the Spark Gap better than one
  > spinning and one or more stationary gaps?
  >
  > Does anyone see a problem with using this?  Is Axial play an issue
  > with bench top grinders?  I was considering using Lexan for my disk, I
know
  > it my be a little more expensive than other materials but it looks real
  > nice!  Is there anything I should keep in mind?  I was told to calculate
the
  > weight (in pounds) of a piece of Lexan use (0.0433 * Volume).  6" disk -at-
.5"
  > thick = .6 pounds (without electrodes, without shaft hole computed).  6"
  > seams a little small to me should I go bigger?
  >
  > One more thing, What makes tungsten electrodes so desirable?  It
  > seams that they wear rather quickly.  There is a great example of wear on
  > Terry's web site
http://www.tb3-dot-com/tesla/hugecoil/powerup2/powerup2.html.
  > Why not use stainless steel?  Does it get too hot?
  >
  > I know the knowledge is out there.
  > Thanks for reading.
  > Ryan Lannis
  >
  >