mel jacobson on mon 7 may 12
is on my website, clayart page.
click below.
mr. freeman has it on his flicker site too.
mel
from: minnetonka, mn
website: http://www.visi.com/~melpots/
clayart link: http://www.visi.com/~melpots/clayart.html
Victoria E. Hamilton on mon 7 may 12
This looks awful! Not even sure what it is, except that something appears
to have melted all over the place. Ouch! I'd love to know the background.
I don't recall receiving a post about this.
Thanks.
Vicki Hamilton
Seattle
-----Original Message-----
From: Clayart [mailto:Clayart@LSV.CERAMICS.ORG] On Behalf Of mel jacobson
Sent: Monday, May 07, 2012 10:40 AM
To: Clayart@LSV.CERAMICS.ORG
Subject: rimas' photo
is on my website, clayart page.
click below.
mr. freeman has it on his flicker site too.
mel
from: minnetonka, mn
website: http://www.visi.com/~melpots/
clayart link: http://www.visi.com/~melpots/clayart.html
Rimas VisGirda on tue 8 may 12
The photo was an illustration of installing elements wound around a bar/tub=
e. The reason I had the photo (that illustrated the support system) is beca=
use the kiln overfired a load of decaled terra cotta tiles to about cone 10=
and I wanted to record that. You can still see a faint image of decal on t=
he porcelain cup. The 2 yellow bars behind the cup are AMACO tile setters t=
hat were holding the tiles. The white in the "lava" is the white glaze on t=
he tiles. -Rimas
Taylor Hendrix on tue 8 may 12
Hey Rimas,
I noticed that the coils were quite droopy on those rods. Was that their
normal appearance or due to the over firing? I know that elements will get
soft at top power (the reason they ooze from broken element channels), but
the picture seems to show excessive slumping.
If one uses larger gauge wire can the length and thus loops be less? And
what about those thick ribbons we've heard about in Japanese electric
kilns? Are they just pinned to the wall without slumping? I bet they are
very expensive.
This electric kiln pimping is almost interesting enough to try myself.
Taylor, in Rockport TX
wirerabbit1 on Skype (-0600 UTC)
http://wirerabbit.blogspot.com
http://wirerabbitpots.blogspot.com
http://www.flickr.com/photos/wirerabbit/
https://youtube.com/thewirerabbit
On Tue, May 8, 2012 at 7:06 AM, Rimas VisGirda wrote:
> The photo was an illustration of installing elements wound around a
> bar/tube. The reason I had the photo (that illustrated the support system=
)
> is because the kiln overfired a load of decaled terra cotta tiles to abou=
t
> cone 10 and I wanted to record that. You can still see a faint image of
> decal on the porcelain cup. The 2 yellow bars behind the cup are AMACO ti=
le
> setters that were holding the tiles. The white in the "lava" is the white
> glaze on the tiles. -Rimas
>
Arnold Howard on wed 9 may 12
On 5/8/2012 9:23 AM, Taylor Hendrix wrote:
> If one uses larger gauge wire can the length and thus loops be less?
A thick element wire must be longer than a thin element wire. This is
because thick wire has less resistance than thin wire. So, a thicker
wire must be longer to have the same resistance (ohms) as a thinner
element wire. If the element does not have enough resistance, the
breaker will blow or wires will burn up.
Since thicker wire must be longer than thin wire, the total length of
element grooves is sometimes the limiting factor in element gauge
(thickness). The greater the length of element grooves in a kiln, the
thicker the element wire can be.
In other words, a kiln that has few grooves must have thinner element
wire than a kiln that has more grooves.
Physics is fascinating.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
Rimas VisGirda on wed 9 may 12
The drooping of the coils is a what it is -drooping. Has nothing to do with=
the kiln overfiring. Besides the kiln didn't overfire for the kiln, it ove=
rfired for the terra cotta. The computer malfunctioned and didn't shut the =
kiln off at 800C; when I went to check it in the morning it was at 1280C (c=
one 10). The kiln can normally go to 1300C. The mass of lava was thick enou=
gh to touch the bottom bar of coils. So they chipped all that out and rewou=
nd new coils, I wish I had taken pictures of the winding process, it was pr=
etty interesting and the "new" coils were pretty snug to the bar/rod. I ass=
ume that they start to droop with age and successive firings... In the typi=
cal USA kiln the "coils" sit in a channel and are, theoretically, held in p=
lace by gravity, however Mr Science says "Gravity never sleeps" and we see =
that if a portion of a coil pops out of its channel it stretches down & dow=
n along the wall of the kiln... In a previous post someone mentioned
winding wire around a vertical bar but the added that some spurs or thorns=
would be necessary to keep them all from sinking to the bottom of the bar =
-I believe that would certainly be the case and hence why the Europeans use=
horizontal bars... -Rimas
Taylor writes:
I noticed that the coils were quite droopy on those rods. Was that their
normal appearance or due to the over firing?
Ben Morrison on wed 9 may 12
Thanks Arnold Howard, that was Groovy!
________________________________
From: Arnold Howard
To: Clayart@LSV.CERAMICS.ORG
Sent: Wednesday, May 9, 2012 6:10 AM
Subject: Re: Rimas' photo
On 5/8/2012 9:23 AM, Taylor Hendrix wrote:
> If one uses larger gauge wire can the length and thus loops be less?
A thick element wire must be longer than a thin element wire. This is
because thick wire has less resistance than thin wire. So, a thicker
wire must be longer to have the same resistance (ohms) as a thinner
element wire. If the element does not have enough resistance, the
breaker will blow or wires will burn up.
Since thicker wire must be longer than thin wire, the total length of
element grooves is sometimes the limiting factor in element gauge
(thickness). The greater the length of element grooves in a kiln, the
thicker the element wire can be.
In other words, a kiln that has few grooves must have thinner element
wire than a kiln that has more grooves.
Physics is fascinating.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
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