Turntable problem - can anyone help?

After a recent house move, my Michell Gyrodec is playing up. The platter struggles to start, and when it does start the speed varies up and down slightly, causing pitch wobbles.

The table it sits on is level, as is the deck itself - I've checked both with a spirit level. The edge of the platter isn't snagging on anything, the motor is fixed to the chassis so it can't have moved, and the belt is only a couple of years old and hasn't seen heavy use. (The previous belt lasted about 7 years).

I tried removing the platter and adding oil to the hollow beneath it. This seemed to fix things briefly, then we went back to
wobbly pitch.

Does anyone have any ideas, please?

 

has the belt gotton any dust on it? clean the belt, the edge of the platter it rides on, clean the old oil out, and the bearing, and re oil - are all the springs level? failing that i would look at the supply itself, but only after the above would be my order,
hope you find the problem,
P

 

I suspect the power supply is faulty.

 

Agree with the PSU being the likely cause, especially if this is a later version with a DC motor.
I it's an old AC Papst motor version running on the little AC wall-wart transformer then the problem is likely mechanical.

 

having owned a gyro for many years .......

check or readjust the suspension especial any lateral moment..


then check the height of the belt groove against the motor pully height
then check the nurled finger wheel that clamps the spindle to the plater is tight [seem to remember that this is under the plater ?]

I've had something similar so don't despair.... its sortable

keep us informed

 

Cheers for all the replies, chaps, that's much appreciated. I'll work my way through your suggestions.

To answer the various questions:

Platter and belt seem clean.

I didn't clean out what was left of the old oil before adding new :shame:

Springs are level.

The motor is a Papst.

Haven't yet checked the relative heights of motor pulley and platter.

Hopefully I can sort it soon - AC/DC's Hell's Bells loses a lot of menace when it sounds like Hell's Hurdy-Gurdy

 

What PSU are you using?

 

Hi Rob,

It's the one you mentioned - the AC wall-wart.

 

Which bearing do you have, the antique one or the later bronze-coloured inverted one?

Is the bearing OK? Didn't you lose the bearing ball during the move?