Okay, so I have taken some photos, but first a somewhat gratuitous shot of the panel controlling this section of the tramway. Why? Well I am particularly proud of this one, still in incomplete, draft form, but just about fully functional at this point. Controls and monitors the status of thirteen points, monitors and displays occupancy of 24 'blocks', will soon run the signalling, equipped with RailCom, this panel has just about everything I could think to implement. Hand made panel, hand made circuit boards, hand coded firmware (100+ pages of assembly coding), it has been a big task - but I only had to do it once now I can copy the design to other panels around the club. If you want something similar on your own layout I suggest you spend money buying rather than trying to design and implement such a thing yourself - unless of course like me you're truly in need of a challenge and entertainment. A less 'digital' and more 'analogue' approach might be the go normally.
Everything happens over six wires to the outside world. Some superfluous wiring has managed to remain in this photo.
So here's a view of the servo point motors, as you can see I use an 8g servo as I have rediscovered when taking the photos, the mounting is a custom (and hastily) made bracket which I nibbled from a length of 1/2" right angle section of aluminium. The point is actuated by a length of piano wire which passes through a fairly tolerance hole in the aluminium bracket to provide the fulcrum point.
Here's a shot of several of the servo motors in close succession, still with plenty of room around them.
A 'normal' railway will have no issues fitting them, these points are placed under trackage modified to come down to 40mm centres.
Here's a couple of shots of the servo point motors wired to their decoders. The thicker yellow and blue wires are the DCC track bus, the three way tag strip is what I use to create junctions between the bus and the trackage, in these photos my 'dropper' wires appear to be yellow and blue too, but that is not generally the case, normally they are a catalogued set of special colours. The thicker red and white wires are the power bus carrying the requisite 5 volts to the decoders, and hence to the servo motors. And the thinner grey and orange wires are carrying a special high reliability version of the DCC track wiring. Even under a total short circuit of the trackage (caused by a tram running against a point) the grey and orange wires still carry control signalling to enable the points to move, clear the short and allow traction current to return to the track. The green (and red and black) wires are carrying switched traction current from the decoder's relay to the point frog above.
In an attempt to minimise some cost (with exponential increase in difficulty of circuit design) I have made double and quad version of the control board. The single double board costs me about $2.53 less to make than two single boards... A quad board saves THREE times that amount against four single boards!!! I never claimed to be an economist!
Again, pink and brown are supplying current to point frogs.
Here's a four board with it's associated tangle of excess wiring on the way out to the various servo motors.
And a better shot of another quad board, this one actually only drives two points. The other two motors operating a pair of swing gates at the entrance of the yard, which open and close according to the state of the points. Being only partially implemented, I disconnected much of the wiring and dropped it down from under the layout for the photo.
So to some videos, with some apology for the video quality, I was driving the layout via my iPad whilst filming on the iPhone and constantly running out of hands to hold both devices whilst holding myself steady in awkward position under and over the layout...
So here you see a point moving under the power of a servo, the motion range here is not quite perfect, but it is sufficiently close until I summons the inclination required to amend the relevant CV to make it perfect. I also apologise for the incomplete ballasting, I didn't notice until I watched the video back...https://www.flickr.com/photos/79705948@N05/14108035759/in/set-72157644901416855
Here is another pair of points forming a double track Y junction, lovingly scratch built, still in an incomplete section. This is the area where the track centres are down to 40mm, note the crossing in the background, that is where the common mounted servo motors pictured above hang out. I also thought that I moved both points in this movie, apparently not...https://www.flickr.com/photos/79705948@N05/14108038849/in/set-72157644901416855
Here's the normal crossing, both points move together and technically at the same time, they share common decoder wiring and have the same address, yet due to adjustable delays, etc, they apparently move independently of each other.https://www.flickr.com/photos/79705948@N05/14292765252/in/set-72157644901416855
Finally, here's a video (of the servo driving the point in the first video) moving under the layout, for those that like the behind the scenes look.https://www.flickr.com/photos/79705948@N05/14314898993/in/set-72157644901416855