Joined: 08/09/2003(UTC)
Posts: 134
Location: ,
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A while back I purchased a 7186 Turntable which I am finally installing on my under construction layout.
It worked when I tried it out a couple of times. Now when I am seriously learning about it, I have several questions.
Is the unit meant to be able to turn past 360 degrees or must it be turned in the opposite direction at that point or sooner? It stopped on me several times between the wider stopping points. It does have a pair of contacts which seemed to be dirty which I cleaned up carefully. It get warm and smells a bit if I try to turn it more than a few normal steps in succession.
Can anyone suggest anything to check, tune up and/or watch out for. Any help or advice from my Brother or Sister Marklinites will be much appreciated. Dick
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 Joined: 23/08/2004(UTC) Posts: 764 Location: Bury St. Edmunds, Suffolk
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Well I don't have a turntable now, but from what I remember it should revolve indefinately in either direction. (stopping at each track). The motor is incredibly noisy and does produce that old analogue smell.
regards
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Regards
Geoff (UK)
marklin HO from the 50's and 60's |
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 Joined: 06/04/2006(UTC) Posts: 655
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Regards (a Scot in Wisconsin),
Maurice [ETE, TTRCA, IG-TRIX Express, Maerklin-Insider & TRIX Profi-Club]
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 Joined: 12/04/2002(UTC) Posts: 429 Location: Hamilton, New Zealand
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It will work in either direction indefinitely. It has a standard marklin SFCM (small flat commutator motor) which with a good clean, light oil, new brushes, checked for mechanical wear etc should perform OK. It is noisy though. You may want to consider some sort of sound isolation from the layout board it's mounted on. |
Cheers
Stuart
New Zealand
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Joined: 08/09/2003(UTC)
Posts: 134
Location: ,
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I think it is not very practical to try and reduce the sound level. The mechanism including the gearing and motor are all rigidly attached to the turntable which is acting as a sounding board. Exactly as a music box drum and spring are amplified when mounted on a wooden base.
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Joined: 28/07/2006(UTC) Posts: 880 Location: Augusta, GA USA
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Mine is very loud also. Actually I have several and they all are. This whole question of noise is very interesting. Railroads are very loud. C Track vs. M track is very quiet. What do we really want? Everybody seems to talk about "prototypical" but seems to want quiet railroads.
Eric
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 1 user liked this useful post by sudibarba
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Joined: 23/03/2005(UTC)
Posts: 2,497
Location: Denmark
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Quote:[size=1" face="Verdana" id="quote]quote:Originally posted by sudibarba
<br />Mine is very loud also. Actually I have several and they all are. This whole question of noise is very interesting. Railroads are very loud. C Track vs. M track is very quiet. What do we really want? Everybody seems to talk about "prototypical" but seems to want quiet railroads.
Eric
Maybe a noise ratio at 1:87? [:0] |
Regards,
Benny - Outsider and MFDWPL  |
1 user liked this useful post by Caplin
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Joined: 19/11/2002(UTC)
Posts: 378
Location: Leuven, Belgiium
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Joined: 26/10/2004(UTC)
Posts: 461
Location: Bruges,
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Dick,
You are talking about the all-metal TT, yes?
I have one just like that and it is VERY noisy indeed [:0][xx(]. I've read somewhere that feeding it with DC current will reduce the noise somewhat (electromagnet), but I haven't got round to trying anything. Some kind of dampening material under the metal disc will probably help aswell.
In the end I'm not sure if I will use it or sell it and get a newer style plastic TT (Reports of problems with that make me doubt even more...).
I also need to check if the old TT uses a common ground for motor and track, to determine if I can use it with a MS. Any ideas? |
Kind regards,
Pieter-Jan
Bruges, Belgium. |
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Joined: 08/09/2003(UTC)
Posts: 134
Location: ,
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Further study of the operation of the TT Unit that I have seems to indicate that when the control button is pushed, it has to be held down for far longer than if one was energizing a turnout. At the press of the button, power is applied to the solenoid and motor simultaneously. The solenoid has to disengage the indexing key at the perimeter of the TTand also to move the stop that will allow the motor to turn. It does this through a series of linked levers. The action is very loose and sloppy as well as slugish in my opinion. Much more force is required of the solenoid than what is needed to move a turnout's points. It appears that the designers deliberately left these linkages sloppy to save costs not to enhance performance. I have a hunch that the problems reported with decoder usage is that the initiating pulse output from the decoder is not long enough.
From what I have seen, the situation that I have observed can not readily be remedied. I am using a single Markin Transformer output at the 17 VAC terminal and nothing else is connected. It is one of the 10 VA units from an older starter set. It should be more than enough to operate the TT reliably.
By the way the single ground terminal on the TT is common with the outer track. One of our responders was not sure.
Thanks for the help from all of the posters re: this subject. Further comments are welcome! Dick
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 Joined: 04/03/2005(UTC) Posts: 1,062 Location: Neu-Ulm, Bavaria
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Quote:[size=1" face="Verdana" id="quote]quote:Originally posted by Dick
<br />I think it is not very practical to try and reduce the sound level. The mechanism including the gearing and motor are all rigidly attached to the turntable which is acting as a sounding board. Exactly as a music box drum and spring are amplified when mounted on a wooden base.
You must know its nickname has been 'Tellermine' in German for decades. That means land mine or plate mine, obviously because of shape and noise .... Regards, Hans |
I like M-track and my things that run on it were built between 1959 and 1972. |
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Joined: 10/02/2004(UTC)
Posts: 2,162
Location: Portugal
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Well, hopefully a 7186 will not blow up in your face [V]!
That's the only time where a teller will produce noise, a very loud one, BTW.
Luis
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