Rock-Ola 1468-- T.T. to fast

I have a 1468 R-O that runs to fast. I tested it with a tach. It's not
much, but just enough to be able to tell. Dia. of mtr. shaft checks
out. Has new idler wheel. Compared to another mtr. Spring on end of
mtr. shaft is ok.
Any ideas?
Thanks

jukeboxrobert wrote:
I have a 1468 R-O that runs to fast. I tested it with a tach. It's not
much, but just enough to be able to tell. Dia. of mtr. shaft checks
out. Has new idler wheel. Compared to another mtr. Spring on end of
mtr. shaft is ok.
Any ideas?
Thanks

Is it the correct turntable? If it has the wrong internal diameter then
your record speed would be off...

I can't recall if your idler wheel has two tires (short stack) or just
one. If it is two tires, then make sure you have the correct wheel as
that sets the speed - if it only has one tire then it has no effect on
the speed until it hardens and starts slipping.

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."

Robert, most of the older machines ran fast.Wurlitzer beginning with
the 1700-up, all Seeburg select o mats etc. The Rowe/AMI beginning
with the 1100 mech (L) were bizarre, so much so that an old operator
said that they would stretch the spring that holds the puck against
both motor and turntable which then creates slippage--dumb idea but
what would you expect.

The solution for this is to first make sure that the motor pulley is
clean and free from any rubber deposits. If so then you'll have to -
carefully- grind down the diameter of the motor pulley with a fine
file. A contact file is OK for this. First mask off the motor shaft so
that filings don't get into the bearing then with motor running gently
hold the file evenly against the shaft for a few seconds. Then clean
it with alcohol place the turntable back and listen to a song.

It will probably be necessary to repeat several times ---use caution
it is not reversible--!

You really should have a strobe disk for this, try Google-ing
"turntable strobe disk" you may find one that you can download and
print out. Make sure they give you the exact size it should be
printed. Neon, 60 HZ LEDs or fluorescent powered by magnetic (old
style) ballasts are needed for viewing.

I have done this dozens of times for both jukes and home turntables. I
recommend leaving it slightly fast to compensate for the drag that the
heavy pickups on these machines cause.

Here is avid of a typical Rock Old playing fast:
http://www.youtube.com/watch?v=ddXRGN8AFTA



Rob

jukeboxrobert wrote:
I have a 1468 R-O that runs to fast. I tested it with a tach. It's not
much, but just enough to be able to tell. Dia. of mtr. shaft checks
out. Has new idler wheel. Compared to another mtr. Spring on end of
mtr. shaft is ok.

Why do you have a spring on your motor shaft? Are you in an area that
has 50 Hz power? The purpose of the spring is to increase the motor
shaft diameter and thus increase the speed that the idler shaft turns on
machines that were imported with U.S. (60 Hz) motors.

--Bob

On 7 Jul., 05:08, "Bob E." wrote:
jukeboxrobert wrote:
I have a 1468 R-O that runs to fast. I tested it with a tach. It's not
much, but just enough to be able to tell. Dia. of mtr. shaft checks
out. Has new idler wheel. Compared to another mtr. Spring on end of
mtr. shaft is ok.

Why do you have a spring on your motor shaft? *Are you in an area that
has 50 Hz power? *The purpose of the spring is to increase the motor
shaft diameter and thus increase the speed that the idler shaft turns on
machines that were imported with U.S. (60 Hz) motors.

--Bob


Hi Robert

Ever thinking about changing the turn-table-grommets?

Could be that the TT-Motor is hanging over on one side ....

Best regards,

Ron