I cant really answer this one. I’m doing 1/2" (G guage) and they dont even MAKE a turntable in large scale. I would be happy with a good, simple manual one though.
thought about that, but using a Lazy Susan, but I couldnt figure out how to make it stay put at each track connection. So I put the idea on the shelf. Lately been thinking if I could modify an HO Atlas turntable mechanism under that Lazay Susan, Humm…???
Hmm…could put little tabes on the edge of the lazy susan, then put ridges on the inside of other edge, that way when the tab goes over the ridge it snaps in place.
Hmm…does that make sense? i can see it in my mind, may not be translating it well.
I was actually thinking of leaving the whole turntable intact and mount the large scale table base on top of in, recesssing the Atlas into the bench work. That way I dont have to redo any of the mechanism , tabs, or the like. Track alignment would be based on the pre-existing Atlas mechanism. The only thing I’m really unsure of is whether the Atlas Mechanism could handle the weight of a large scale engine. Mine are small and the turntable would be no longer than 12"-14 " . Maybe some rollers at the largescale turnable base with the atlas “floating” under, tied to the benchwork. Might work?
I have a motorized Walthers turntable, but I find the electrical contact is intermittent no matter what I try. On my new layout the turntable might be done away with and just use an engine house.
Would RATHER have “automatic” - ie motorized. I built a little “gallows” TT w/ Audio Jack center and ARMSTRONG movement. Use a “friction” pad at the end to hold it in place. (see MR’s Carabasset & Dead River RR plans). It works! (Hey! the big ones had to be turned by hand!)
The mechanism will wear out quickly, It is called a “Geneva mechanism”, and in the case of the Atlas turntable it is a plastic pin and a plastic Geneva wheel.
While I’d rather have an automatic one, my layout has a manual one. It, along with the roundhouse in my yard was built for me by my uncle. I generally don’t do much actual making up of trains, etc. so I usually just switch around locomotives in the roundhouse by hand.
Is there a way to use something like this on a walthers transfer table to align the tracks? So when it is operatered, it moves to the first track lines up, then on to the next. As it is it has to be manually done.