Wallerawang - Construction, June 2009
The last month has seen the Group concentrate on the layout wiring, in particular, the control of the storage yard point motors and the wiring of the end modules. Scenery has also been started on the end modules, with layers of styrofoam glued in placed and shaped to form.
The circuits which will control access to the tracks in the two seven-track storage yards have been finished. Four point motor driver boards (three driving six motors, one driving eight motors) have been finished and tested. The fourth diode matrix board, for the yard ladder having connections to both the Up Main and the Branch, has been completed. Eighty-three diodes are required to allow the ability to run trains either onto the Main or onto the Branch, with up to ten points needing to be aligned, depending on the route. This matrix board will also control the Up Main/Branch crossover located on the adjacent end module, meaning that only one pushbutton on the yard's control panel still needs to be pressed for either branchline or mainline running of a train.
Control panels for each of the end modules were designed and assembled. Two wooden shelves were constructed to mount the panels and to provide a place to hold a beverage of the operator's choice, usually a nice hot cuppa. These shelves have been fitted, with one panel wired into one module. This module has also had the backdrop fitted, and is currently awaiting full electrical testing. The control panel for the other end module is partially wired, with only the track block feeds and point control wiring to be soldered to the switches.