Diy tt v1.1

[stupinder]

Always really liked your designs, Hoops. Will follow this closely :-)

[hoopsontoast]

The bits arrived:


Sony TTS-3000 Parts by RSdesignUK, on Flickr


Sony TTS-3000 Parts by RSdesignUK, on Flickr

Really well made, the original cast frame was 5mm thick!
The bearing is lovely and requires a push down for the platter to sit in it properly, pretty air tight.

There is also the PSU (not in the pic) with the 33/off/45 selector and speed variation. This will be housed in a separate enclosure with just the one group of cables going to the motor.

Just need a belt now!

[AlfaGTV]

Didn't realise until now, but my assumption was that the TTS-3000 was an idler drive TT?
I must have got them mixed up...

Still a great thread to follow, and the items looks very tidy!
Regards /Mike

[hoopsontoast]

Nope, a belt drive with servo-driven for the motor I believe.

[sq225917]

The motor looks to be a pretty heavily built AC unit and there's obviously part of a sensor unit on the underside of the platter. Unless you have the other part of the control system that reads that passing sensor there will be no servo-loop in effect. There's nothing hidden out of view under the platter on the end of that wire is there?

How many wires are there to the motor Rob, 4 or 5? It might be that without the servo loop that it runs away uncontrollably. Do you know anything about the motor, input voltage etc?

[AlfaGTV]

http://www.thevintageknob.org/sony-TTS-3000.html

Looks to be a nice donator!

Regards /Mike

[hoopsontoast]

there are 4 wires from the motor. The 4 wires would go onto a terminal thats on the end of the wiring with the PSU. (out of the photo)

I believe its just balancing weights on the platter rather than a sensor.

Service manual here: http://home.versanet.de/~j-schmieding/

[YNWaN]

Yes, those are balance weights. If it does use feedback it will be generated by the motor coils.

[hoopsontoast]

Yes, those are balance weights. If it does use feedback it will be generated by the motor coils.

Yes, after reading the service manual, it seems there is a tone generator driven by the spindle on the motor which is fed back to the Feedback/Servo circuit. There is a simple diagram in there.

[sq225917]

Oooh, that's quite fancy. AC servo controlled DC motor drive.