So i just got this 7186 turntable witch does not seem to have been used in a long time (a lot of dust on it)
it didint have the little blue controler so i used a normal blue little switch control box (1 for left right and one button for the little finger ) and it worked albiet its very noisy (guess thats to be expected though) but i had to hold down the directional button didint see the people have to do that in the videos i found online

now to the real question here

i opened up the little house so i could put some oil on the gears
i then figured i should turn it

and i noticed what looked like sparks from the engine is that normal?

kinda looks like a small light

should i replace the brushes ?
is the sparks in the motor area just the engine burning off old dust?
is it normal for it to spark??

all help aprichiated thanks

thanks in advance

If the motor sometimes runs on after the 'bridge' has latched is the only adjustment I can make at what I think are the solenoid points?

I've had the thing for forty years but have never really investigated it. Using your diagram (thanks!) I'll sit down under a bright light and watch what it does.

(For those in the UK it came off the second hand shelves in Beatties in London...)

That sounds like it probably needs a drop of oil on the motor bearings and the gears. It won't need much at all, just enough to moisten the little sponges on the motor bearings.

Question 1 yes no change needed with the original blue control box.
Question 2 yes in conjunction with diodes (one for each inductor wire but the 2nd one in opposite direction to the first.),replacing the direction relay
Cheers
Jean

Hi Hampus

Here is the drawing of the 2-button blue control.


It is very simply replaced with on SPDT and one push button
Principle: the SPDT selects the rotation direction and the push button "unlocks" the TT to the next track.

Questions Answers:
- Q1 yes the TT will work with 16 VDC instead of 16VAC. The solenoid current will be a little higher but you are not supposed to push very long on the button.
- Q1a yes you can have digital locos run on the TT in digital
- Q2 connection of an old automatic railroad crossing is OK in digital (a) having a detection section (one isolated rail on both sides of the automatic railroad crossing and (b) connecting the yellow plug of your crossing to the yellow of ANOTHER 16 VAC transformer while its brown is connected to the digital brown (the non-isolated rail)

- the above-suggested connections do not take any power from your MS2 and its supply so it MUST NOT be no shutdown by the MS2

WARNING: NEVER try to use the digital power supply (that feeds your MS2) to feed SIMULTANEOUSLY another circuit (the TT or the crossing) as you will burn your digital system (the track box)
Cheers
Jean

Hi

No, this is not a question of power but rather of forcing a high current through the digital drivers (power transistors) that would destroy them if you don't keep the MS2 : Track box power supply dedicated only to feed them.
Yes you can feed the old railroad crossing with 16vDc (separate power supply). And connect the trackboxe,s zero to one of the poles of the other PS Unit.

Cheers
Jean