arms (13), then installing the control arms back on the servos
(14). Once both semaphore control wires are connected it's
time to install the servo driver electronics.
Servo driver electronics
I chose to use
Dual 3-Way servo drivers to
operate my semaphores. Each of these boards controls two
servos, ideal for my double-blade train order semaphores.
I needed to run my DC accessory power bus into Oakhill to
reach the servos. I mounted the Dual 3-Way controller on the
insulating standoffs that came with it and connected power
wiring and the servo control wiring harnesses to it.
14
13
13: Threading the servo control arm onto the bent sema-
phore control wire.
14: The threaded servo control arm on the servo, ready
to be secured with its mounting screw.
