CED Digest Vol. 6 No. 26

CED Digest Vol. 6 No. 26 • 6/30/2001
20 Years Ago In CED History:

July 1, 1981:
* The United Automobile Workers (UAW) rejoin the AFL-CIO after 13 years
as an independent labor union.

July 2, 1981:
* The U.S. Supreme Court unanimously upholds the earlier agreement
struck with Iran to return $2 billion in frozen assets in exchange for
the 52 U.S. hostages.

July 3, 1981:
* Asian youths in the predominantly Indian neighborhood of Southall in
West London fight with "skinheads" who had been stoning and burning
shops in the area.
* Polish-born actor Ross Martin dies at age 61. Martin is best known for
his role as secret service agent Artemus Gordon in the TV series The
Wild, Wild West.
* Future CED titles in widespread theatrical release: Clash of the
Titans, The Great Muppet Caper, SOB, Dragonslayer.

July 4, 1981:
* Chris Everet Lloyd and John McEnroe win the female and male singles
titles at the 1981 Wimbledon Championship (CED) respectively defeating
Hana Mandlikova and Bjorn Borg. McEnroe is fined $5000 for his enfant
terrible antics.
* Racial rioting in Great Britain spreads from London to the city of
Liverpool.

July 5, 1981:
* Alain Prost wins the French Grand Prix (CED).

July 6, 1981:
* Isabel Peron, former president of Argentina, is freed from five years
of house arrest by a federal court.

July 7, 1981:
* Ronald Reagan nominates Sandra Day O'Connor as the first woman justice
of the U.S. Supreme Court.
* The Solar Challenger becomes the first solar-powered airplane to cross
the English Channel. Energy for the 165 mile, 5.5 hour flight was
provided by 16,000 solar cells mounted on the wings and tail.

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From: "Its me" <izcoul>
To: ceds@teleport.com
Subject: rca ced player
Date: Wed, 27 Jun 2001 14:41:30 +0200

Hi !
I'm looking for an RCA SJT-200, 300 or 400 CED player. Is that possible
to help me saying where to found one please !
Thanks...
izcoul@hotmail.com

------------------------------------------------------------------------
Date: Fri, 29 Jun 2001 18:40:15 -0400
From: Paul Campbell <76743.2151>
Subject: Servo Drive Belts
To: "digest@cedmagic.com" <digest@cedmagic.com>

To the CED digest members and owners.

Since I've received a few E-mails concerning my solution to the
turntable
drive belt in CED Digest vol 6 No. 25 I figured I would share my
solution
to a problem with the servo drive belt. The belt on several of my
machines
had a flat spot on them from sitting for years unused. When playing, the
flat spot would eventually make it's way back to the motor shaft and
stick,
causing the player to skip until either I helped it along or the motor
would spin furiously until the arm would advance then have to back up to
the correct position. I purchased a few PRB brand FRX2.0 belts for
replacement. Problem is their thickness is .032 inch. When installed in
the
machine the geartrain would only work when using fast forward or search.
I
measured the thickness of the original belt and it was .016 inch. I
tried
cutting the width down, it reduced the tension, but the belt would then
run
off the gear pulley.  My solution was to grind down the thickness of the
replacement belt.

OK. Now here comes the part where you need to have the equipment or have
a
friend who does. Being a machinist I just happen to have a 10" South
Bend
lathe in my garage. Any decent small metalworking lathe should work,
probably even  the Sherline hobby lathe. I chucked up a 3/4 inch
diameter
endmill backwards so the shank is sticking out of the chuck. Indicated
it
true to .0005 "  Any precision 3/4" shank should do. I put the belt on
the
end of the shank and turning the chuck by hand I got the edge of the
belt
to turn true by eye. Then using a small V block I mounted a Dremel
flex-shaft to the crossfeed and trued it to the chuck centerline. I
Installed a small, flat grinding wheel and with a dressing stick
temporarily mounted to the lathe bed on blocks I dressed the wheel true.
Now for you machinists out there I know that if not taking precautions,
grinding swarf on a lathe will wear it out quickly. Anyway, after that
was
done I turned on the lathe using a slow chuck speed and apron feed rate
and
the Dremel grinder about half speed. I touched off the wheel to the
belt,
moved the grinding wheel to the left and engaged the apron feed. Let the
grinding wheel pass over the belt to the right, disengage the feed, move
it
back over the belt, advance the crossfeed .001 and go at it again. I did
this about 8 times until I measured the overall diameter of the belt on
the
shank was reduced about  .016 in. For those who might try this, I would
think using a lathe grinding wheel attachment or universal grinder would
be
too aggressive a grind. I've operated that equipment in the past.

Now the belt is the proper thickness and works great. I don't know the
longevity yet but so far it's been 3 weeks and 14 hours of service.

Paul
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