Wiring a Diamond Scale Turntable
- I just posted a few photos in the photo section showing how I wired
my Diamond Scale 75 ft turntable. First I made a cam to fit the
shaft of the turntable and attached a microswitch to the turntable
base. The switch lever rides on the cam. The microswitch actuates a
double pole double throw relay which is used to reverse track
polarity as the turntable goes past 90 and 270 degree. I guess you
could use an electronic reverser if you have a dcc system to
accomplish the same thing but this is simple and foolproof.
I made some wipers out of spring brass that ride on the turntable
shaft for power to one of the track rails. I drilled and tapped on
the top side of the shaft for a solder lug that brings power to that
rail. I added a small connector so the bridge could be easily
The other rail is powered through the ring rail. There is a brass
wiper rubbing on the ring rail at each end of the bridge. These are
connected to the other rail. Having two wipers gives redundancy.
I use the Diamond Scale power unit and control it through a simple
variable power supply. I align the turntable by eye.
This has been in operation for three years now and I have never had
an engine lose power on the turntable. As you can see in the photos,
scenery is not complete in this area but the turntable works great.