Point actuators.
It was 'full steam ahead' this week, with all three of us fitting actuators to both of the main boards. Most needed wires extended, but not the same blade remedials as last week.
After testing, the actuator wires were trimmed to the correct length.
Just one to go. The first actuator we fitted was of the original design, which would have to be replaced in due course.
A brief discussion took place regarding the switching system we'd agreed to use on the new control panel. Many of the components had arrived, but the relays were still winging their way from China.
We confirmed that the relays would be operated by their own 5v supply, switching the 1.5v (min.) supply feeding the servo's. It was acknowledged that as the servo's appeared to operate differently, it might be necessary to increase the base supply voltage and fit local resistors to the more freely-operating units.
The original system had pairs of stud contacts feeding each of the two coils on the H&M point motors, with a common return. The two feed wires are reused for the servo supplies, with the polarity reversed by the relays. A DPDT switch would do the job much simply, but we couldn't find a suitable rotary switch.
