Re: [TCML] Frying tesla coil

["Tim Wenzel" <cuba_pete@xxxxxxx>]

Quarkster, that sounds like a lot of good high tech info.  I love watching 
those how it's made shows on Discovery and History and the like.  Very 
interesting, to say the least.

T.J.Wenzel
----- Original Message ----- 
From: "Quarkster" <quarkster@xxxxxxx>
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Tuesday, June 01, 2010 2:23 AM
Subject: Re: [TCML] Frying tesla coil


Gary -

I think that it is MUCH more probable that what is shown in your video clip 
is a simple insulation breakdown and turn-to-turn short between two adjacent 
turns on your secondary. Over the years I have personally seen this happen 
twice, and both times the appearance was EXACTLY what is shown in your clip.

Facts about plastic extrusiuon machines:
1. Because of the high cost and fine finish on extrusion dies, every 
precaution is taken to ensure that no abrasive material is ever allowed into 
the material hopper.
2. Extruders are almost universally equipped with wire mesh "filter screens" 
that filter out any particles of foreign that may accidentally be introduced 
with the resin granules. Google "extruder screens" to see how fine these 
screens are.

As far as seeing darker specks or blobs in white PVC, this is easily 
explained by any one of several different sources:

1. Extruders may run different color materials at different times. Although 
every effort is made to purge the machine of the previous material, small 
chunks of material may get stuck in the feed screw or other areas. Later, 
when a different color material is being run, these chunks may finally break 
free and pass into the extrusion stream, where they end up in whatever 
material and shape the extruder is currently running.

2. Bits of material may get stuck in the melting zone of the extruder, where 
they eventually start to breakdown (carbonize). Bits of this material may 
slough off from time to time, and appear as dark specks or patches in the 
extrusion.

Best regards,
Quarkster

--- On Mon, 5/31/10, Garry Freemyer <garryfre@xxxxxxxxxxx> wrote:


From: Garry Freemyer <garryfre@xxxxxxxxxxx>
Subject: [TCML] Frying tesla coil
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Date: Monday, May 31, 2010, 6:16 PM


This is a video of my tesla coil frying due to foreign matter in the PVC 
pipe that forms the secondary.

One person on the list mentioned that they sweep the floor and dump it all 
into the molten plastic so PVC can contain metal fragments, bug parts, hair, 
wire, screws etc etc.

I was surprised how easy it was to upload videos to Youtube...

http://youtube.com/watch?v=L_40Oq3UKVY
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