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LAPIDARY ARTS and FACETERS DIGEST
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Issue No. 135 - Wednesday May 28, 2003
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Moderated by: Thurmond Moore III
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Committed to carrying on the fine works of
Hale Sweeny and Jerry Dewbre
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POST TO EITHER LINK BELOW:
lapidary@caprock-spur.com
faceters@caprock-spur.com
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VISIT OUR WEBSITE TODAY
http://www.gemcutters.org
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From the Moderator:

Hi Folks,  Sorry about yesterday's lapidary V1 #68.
My old list program that I still use to collect post got
a little frisky and sent out its own unformatted version.
Hopefully the issue is resolved and should not happen
again.

Thurmond
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Index to Today's Digest

01  RE: Speed Control D/C Motors
02  RE: Speed Control D/C Motors
03  RE: Refacing a copper lap.
04  RE: Beryl from Maine!
05  NEW: Rough to be cut
06  RE: bio Dolly
07  RE: Faceted Stone Repairs & The Art of Cheating Article Link
08  RE: Faceters Symposium 2003

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Message:01

Subject: Re: lapidary V1 #68
Date: Tue, 27 May 2003 16:33:52 EDT
To: lapidary@caprock-spur.com
From: Astronal@aol.com

To M. Durstling, I have bneen using  a DC motor on my Graves for more than
twenty years.  Transformer and rectifier from a surplus store; continuously
variable seed.  astronal@a0l.com


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Message:02

Subject: Motor controllers.
Date: Tue, 27 May 2003 16:45:58 -0400
To: <lapidary@caprock-spur.com>
From: "Jonathan L. Rolfe" <webmaster@gearloose.com>

At 02:10 PM 5/27/2003 -0500, you wrote:
>Unfortunately my knowledge of electrics is next to nil. I can get a pile of
>D/C motors, 90 volts, 24 volts, 30 volts, what-have-you, cheaply at the
>local surplus store. These in turn would entail buying or building a
>rectifier power supply. But I have no idea how to tell whether any given
>D/C motor is a permanent magnet motor or not; nor do I know what sort of
>device I would use as a speed control.

A PM type has only two wires coming from it.  Get a 90Volt PM motor, and
then from Grainger's get the
 
<http://www.grainger.com/Grainger/productdetail.jsp?xi=xi&ItemId=1611673009>2M510
  1 Control,DC Speed ,
<http://www.grainger.com/Grainger/searchresults.jsp?xi=xi&search_type=BrandName&Q
ueryString=DART
CONTROLS&action=Go!>DART CONTROLS  $77.40

Though this controller also had a field output, if you end up with a
wound-field type instead of a PM.

Connecting it and setting it up is easy.  These are the PC Boards on a
simple chassis.  With proper heat sinking they will run a 1 Horsepower
motor, sufficient for (haha) a 16 inch slab saw, so you need have no qualms
about using it on a facet lap spindle.
They are a full wave SCR controller that will provide constant speed
regardless of load.
Variable speed is the way to go.  A fixed speed spindle, IMO, is like love
without a partner.  Possible, but who wants it?  :-)

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Message:03

Subject: Refacing a copper lap.
Date: Tue, 27 May 2003 16:51:20 -0400
To: <lapidary@caprock-spur.com>
From: "Jonathan L. Rolfe" <webmaster@gearloose.com>

At 02:10 PM 5/27/2003 -0500, you wrote:
>A word of warning-- your "best" bro-in-law  will probably become
>your "worst" bro-in-law if he doesn't understand that the laps are charged
>with diamond. Diamond plays absolute hob with facing bits, even carbide. I
>have faced my laps, but I know going into the process that I will have to
>re-sharpen the tool several times before the smoothing process is done. As
>for identifying what grit was used to charge the lap, unless the person you
>got it from knows or it is written on the lap, good luck.


Start the cut a ~10 thousandths UNDER the lowest surface of the copper
lap.  In this way the tip of the tool will always be under the diamond
charged layer.  As the ribbon is peeled away, the diamond charged edge will
wear a groove on the outside of the tool, but the actual cutting edge will
remain unharmed.  You can do quite a few without sharpening the tool.  Most
people are timid and try to take off a tiny amount, with the result that
they are doing the cutting in the fully charged section of the old lap...a
frustrating and futile undertaking. (Been there!!!!)

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Message:04

Subject: Beryl from Maine!
Date: Tue, 27 May 2003 16:56:00 -0400
To: <lapidary@caprock-spur.com>
From: "Jonathan L. Rolfe" <webmaster@gearloose.com>

>. If anyone wants any let me know and you can have some for
>cheap.... The pieces run from small crystals to larger portions of crystals
>and color run from sky blue to dark green... I have made a few nice
>freeforms from this stuff and maybe someone would like to try it out..
>..I picked up about 16 pounds of beryl 3 weeks ago after
>digging up some old dumps ( 60 + years old) ,,,, funny that back then all
>the unwanted materials went into the dumps.....UNWANTED ??


I was 14 or 15 when I found a beryl crystal in an old mica mine near Paris,
Maine.  I was intrigued by the crystal and its color, and that is what
started me faceting!  I understand on nearby Albany Mountain, the largest
beryl crystal on record was found (At the time..who knows, nowadays!)
That was in 1960 or so.


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Message:05

Subject: Rough to be cut
Date: Tue, 27 May 2003 19:34:03 EDT
To: lapidary@caprock-spur.com
From: Ngems@aol.com

This is mostly for any cutter "down under."
I received a request from someone in Australia to cut his rough. I wasn't
sure about international shipping of rough/cut stones so I told him that I'd post
this the list to see if any of the Aussie cutters might be interested.
You can contact this guy, Robert Burley , at the following E-mail address
       croatbob@hn.ozemail.com.au

Norm Holbert
Port St. Lucie, FL

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Message:06

Subject: Re: bio Dolly
Date: Tue, 27 May 2003 18:38:39 -0500
To: LapidaryArtsDigest <lapidary@caprock-spur.com>
From: Dolly <greykin@attbi.com>

> Carl wrote: Here she is being too kind to me as I may have met her and - (gulp)
FORGOT!

<smile>
maybe not
I've met so many people recently that perhaps it was a different Carl I
was thinking of. AGMC is a big club. In any case, I'll be looking
forward to the next club meeting as we've now met. Kinda sorta

and
I'm glad to be here too

Thanks all for the help and great information.
Good resources on this list.

Dolly

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Message:07

Subject: Re: Issue No. 134 - Tuesday May 27, 2003
Date: Wed, 28 May 2003 02:59:44 EDT
To: lapidary@caprock-spur.com
From: Rocksinhed@aol.com

Hi Don

 Your Back Benders article By Jill Rowland can be found here

 http://www.cfmsinc.org/Newsletter/News1999/awards99/aaa.htm#8

 Have a great day

 Jimmy Quigley

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Message:08

Subject: Faceters Symposium 2003
Date: Wed, 28 May 2003 08:30:26 -0700 (PDT)
To: LAPIDARY ARTS & FACETERS DIGEST <faceters@caprock-spur.com>
From: Glenn Klein <glennklein@yahoo.com>

Hi Everyone:
 
I am very unhappy to report that Jonathan (Gearloose) Rolfe is not going to be
able to make it out from the East to be one of our speakers at the Faceters
Symposium 2003 next week in Ventura.  Would you believe that the reason is that
he has to WORK?  I used to do that....work.
 
The Company that he consults for insists on sending Jon to some darn un-important
(to me) meeting somewhere.  He has to go there.  Jon says that the Company will
be giving him some compensation for the airplane tickets that he has to Ventura. 
But will the Company compensate the rest of us for taking Jon away....I doubt it!
 
I have a speaker lined up to take Jon's spot at the Symposium.  DAVID ICHELSON,
who is a diamond cutter, will take his spot in our Schedule of Events at the
Faceters Symposium 2003 next week at Ventura, CA.
 
I am sorry to loose the chance of talking to Jonathan face to face, but am happy
to know that I will get to do that with David.  David is anxious to speak to us
because he thinks it is great how the colored stone world is so ready to share
cutting information with each and every other faceter.
 
See you all soon.  Remember to bring your most Beautiful Stone, so that you can
enter it in our contest on Friday at the Symposium.  Then, on Saturday, at the
Awards Luncheon you will learn if everyone else thinks your stone is the
prettiest of those entered in the contest.  Have fun, win a trophy.
 
Plan to come to Ventura.  You can pay at our door.  Let me know now that you will
be there, or you will go without food at the Awards Luncheon.
 
 
Glenn Klein, Chairman
Faceters Symposium 2003                glennklein@yahoo.co


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Post something from your experiences in gemcutting today!
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TODAY'S FUNNY ~

The bronze statues:

A tourist wanders into a back-alley antique shop in San Francisco's Chinatown.
Picking through the objects on display he discovers a detailed, life-sized bronze
sculpture of a rat. The sculpture is so interesting and unique that he picks it
up and asks the shop owner what it costs.

"Twelve dollars for the rat, sir," says the shop owner, "and a thousand dollars
more for the story behind it."

"You can keep the story, old man," he replies, "but I'll take the rat."

The transaction complete, the tourist leaves the store with the bronze rat under
his arm. As he crosses the street in front of the store, two live rats emerge
from a sewer drain and fall into step behind him. Nervously looking over his
shoulder, he begins to walk faster, but every time he passes another sewer drain,
more rats come out and follow him. By the time he's walked two blocks, at least a
hundred rats are at his heels, and people begin to point and shout. He walks even
faster, and soon breaks into a trot as multitudes of rats swarm from sewers,
basements, vacant lots, and abandoned cars. Rats by the thousands are at his
heels, and as he sees the waterfront at the bottom of the hill, he panics and
starts to run full tilt.

No matter how fast he runs, the rats keep up, squealing hideously, now not just
thousands but millions, so that by the time he comes rushing up to the water's
edge a trail of rats twelve city blocks long is behind him. Making a mighty leap,
he jumps up onto a light post, grasping it with one arm while he hurls the bronze
rat into San Francisco Bay with the other, as far as he can heave it. Pulling his
legs up and clinging to the light post, he watches in amazement as the seething
tide of rats surges over the breakwater into the sea, where they drown.

Shaken and mumbling, he makes his way back to the antique shop.

"Ah, so you've come back for the rest of the story," says the owner.

"No," says the tourist, "I was wondering if you have a bronze lawyer."


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REFLECTIONS AND TIDBITS:

The most wasted of all days is one without laughter.
 
---E. E. Cummings---


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