Jim,

Way YES!! You hit it with this paraghaph;

If I understand correctly about the B-mann turn table, the only power to the whole shebang is via track #4 and somehow that power gets to the bridge other than through the contact tabs.  Then when you turn the bridge, it powers up whichever other approach track it aligns with via those contacts.  What would happen if you slipped a piece of Scotch tape, sticky side up, under the ends of the rails of track #4?  Then the contacts would not be able to make contact with track #4 and there would be no short circuit.

     That is absolutely the answer. Pos#4 does not NEED to contact the bridge, so the tape idea works perfectly. Another index # also has a DCC powered track coming in, so tape there also..WOOP.

     There is still a problem that does not bother me, but you had mentioned earlier. The power to the bridge is not constant...Blinking out as the bridge approches idexes that are polarized differently. So engine lights, etc. blink on/off/on as it rotates around.

Thank You Very Much Jim,
kpsdjs
Kelly

Bach Man, and All,

     Even if I provided DCC module, the rail will still "short" as I rotate away from Index @#4!! Please... Do you have a real solution? Or just glaze?

THE #4 TRACK WILL ALWAYS (All-Ways) SHORT WHILE ROTATING AWAY FROM IT!!

Gimme something I can use.

Are there others out there with this table? I need to hear from as many as possible!

Thanx
kpsdjs

NarrowMinded, and All

     Please re-read my last post. I think it answers you. Track #4 provides only power to the bridge. (At least in DC mode) The instructions show DC mode needs "seperate" power, but the DCC seems to show only "track" power is required.

I.e.; My TT is DC, being controlled by my DC controller. The track @#4 has DCC on it. But the DC controller does not seem to matter, even if I unhook it, the DCC is still shorted!
     I can't get past the FACT that when rotation starts, it Immediately shorts to it's own "other rail polarity". (which is DCC) Shuts down my DCC controller every time. This will be in ALL of these TTs!

Hope to hear more,
kpsdjs

Yardmaster, and All,

     My TT is DC, being controlled by my DC controller. The track @#4 has DCC on it. But the DC controller does not seem to mater, even if I unhook it, the DCC is still shorted!
     I can't get past the FACT thet when rotation starts, it Immediately shorts to it's own "other rail polarity". (which is DCC) Shuts down my DCC controller every time. This will be in ALL of these TTs!

Hope to hear more,
kpsdjs

Jerrys HO,

     Do you have an E-Z Comand DCC Controller? Or do you only run DC. Problem would not show up on DC systems. It keeps resetting my DCC system.

Thanks Jerry,
Please re-reply. I am very curious to hear about anyones experience with this turntable.

Thanx,
kpsdjs

Jim,
     Thanks for your reply. The problem is better understood if describe contact area's better.
First; When track is "indexed" It makes contact between the Bridge and Rails with Flexable copper contacts that are atached to the underside of the bridge rails. As rotation starts, these contacts move with the bridge and extend out to contact the next rail. Unfortunately, that next rail is it's own "other rail polarity"... and ZAAP! a momentary short causes reset of my E-Z Comand.
     The engineering fix would be to not allow power at that moment. I understand wanting all the lights and whistles, but they do alter polarity on some rails already, (as compared to main track power @ # 4pos.), causing momentary outages. Perhaps those contacts should "Drop away" slightly so they will "clear" unwanted rails while away from "index"? or?  I will re-engineer for $$. But I think they should do something to improve the product.

kpsdjs

Doneldon, P.S.

     Just FYI. The problem is known exactly. It is an engineering error. The rail should not be allowered power while it rotates away from "Indexed" area!

Have a nice day, Doneldon

kpsdjs

Doneldon

     Thanks. But thats not it.

     This does remind me that the instruction never mention anything about "Polarity" at different positions. I had to run through all the positions one at a time and note "polarity". Otherwise bringing in more than one rail with power can cause catastrophic "Short Circuit" to entire layout!!

Thanks,
kpsdjs

Hello all,
     I have recently aquired the Bachmann motorized turntable, and find that it "shorts out" as the rail rotates to it's own neighboring rail. While rotation continues faultlessly, it has none the less "shorted" long enough to reset my "E-Z Comand Controller" every time.
     I have a "relay patch" to cut power to the table's rails. However, I wonder if there is standard fix, or plane to engineer out the problem?
     The best fix would be to only allow the "contact fingers" power contact near "index". I quess this got overlooked at some level, but deserves attention, as it is otherwise an extreemly well made product.
Any Thoughts? kpsdjs

     I am very interested in this new turntable. It has indexed track at 20 degree intervals. I am having trouble finding a roundhouse shop to fit. Most are indexed at 10 degree.
     Anyone out there have any ideas?

P.S. It's HO

Thanks
kpsdjs

Do I have to remove the decoder and place "Dummy" pins if I only have DC right now? i.e. No command controller yet!

Tanks
KPS

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