Does anyone know (or can lead me to) how I would wire the DC power supply to my Atlas tt motor?(Im using a Hornby SELECT controller power supply)
What I want to do is have a “MAINS” power switch (with a green LED for ON, and red for OFF) on my control panel, that I can turn on and off then have that main power switch connected to the TT motor control switch in which I would use a DPDT to change the motor direction,
Would this be practical? as when im not using the TT I can have it switched off at the MAIN toggle on-off switch?
Sure, that could work, an on-off switch, plus a DPDT switch to change TT drive direction. There’s no need for the TT drive to have power on the Atlas when it doesn’t need to be repositioned.
But you can do both with one switch. Get a DPDT- Center Off switch. The two directions are obvious, but just leave it in the center when you want the TT drive off.
Another option is to use a momentary DPDT-CO switch. This way you’ll press the spring-loaded switch in either direction, but as soon as you let off it returns to the Center Off position. This means you need to keep you finger on the switch until movement is complete, so it acts in part as a safety feature.
If powered by a common DC gear motor, turntables can, indeed, go in both directions. most all low RPM, 120 volt AC, Hurst geared motors are also fully reversable.
Some rare, lock ratcheting track alignment tables only allow unidirection operation.
I can only add how I control my Atlas TT. I use an old train set transformer. It’s one that has a center off throttle. You turn it in either direction to go whichever way you prefer, as there’s no separate direction switch. Turn it farther to go faster in the preferred direction – although as noisy as the Atlas is, a little throttle goes a long way.
Is there something about wiring up the specific switch you have on hand and are having an issue with?
Since you say it’s about wiring the switch, I’ll hazard a guess.Just wire it in line, assuming it’s an all DC circuit.
If you’re talking a circuit that’s on AC mains power, then it’s best to have an electrician who knows your local codes wire it up. The principles are usually the same, but the specific hardware and other items may be spec-ed diferently etc.
If the switch does have built in LEDs and is for general household use, then the LEDs are in the circuit a certain way to protect them against AC voltage. If you are trying to use it on low voltage DC, then that may be causing an issue with the polarity of the circuit, if the LEDs aren’t illuminating correctly.
If it’s that or something else, please try to post a diagram. It’s hard to give advice in cases where the circuit is not clear or the problem you’re having isn’t better described.
I have a Hornby Select controller that I was going to run my layout with but I then decided (for the great of model railways ) to use an NCE system
SO with the power supply that came in the Hornby set, I want to use it for power for the turntable motor as I don’t want to use it with DCC
,so I want to know how I wire it (the power supply) to a power “on” switch (off-on) then to the master controlling switch (on-off-on ) that i can have on my layout control panel ,
ON being clockwise direction and the other ON position to be anti clockwise direction
I will forget the LED lights as it will involve wiring a circuit beyond my capabilities
I hope that helps you out a bit as I am just learning electrical side of things, please forgive my lack of description in an" easy to understand way"! I know im not good at asking what I need help with in this area
I’m not familiar with the Hornby power supply, but presume it puts out around 15 volts since was originally for use with DCC. I assume you want to switch the DC side, so you will stay away from the AC side.
You feed the TT from the DC terminals,which are the center tabs on the back of the DPDTCO switch. That’s shorthand for your on-off-on term, at least here in the States. The leads from the supply go first to one side of the terminals, then CROSS them and solder to the opposite terminals. That way the power flows out from either normal polarity or reversed polarity, allowing control of the TT direction.
The problem with your plan to use a power supply is that you will have no control over the speed of the TT. You either get zero voltage or you get the full output voltage, probably around 15 volts. That Atlas TT may sound more like an Atlas ICBM with that much juice powering it.
That’s one of the big reasons I brought up what I did with my install, as the rheostat has the control circuit built in, you simply turn it up or down to adjust the TT speed. Just an on-off switch in any form will not give you speed control.