A Starter for Lambourn-mechanism
Entry posted by RichardW1
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It seemed appropriate to show a picture of the bits that make it work. The servo motor is self explanatory. the brass plate screwed to the small block of ply is the main below baseboard drive. The red and black wires power the LED.
What may not be so obvious is the double crank arrangement for the signal. Just below the red and black wires can be seen a small section of copper Mercontrol tube, a steel wire attached to the signal is guided through this to a small hole on the crank, which is very close to the pivot screw. Now to get this wire bent in the correct place is no easy task, so the crank is mounted on a swivel link. the pivot for this is to the left of the crank pivot. this enables the position of the crank to be adjusted to suit the actual position of the bend in the operating wire. Once set the swivel arm is locked in place with Cyano.
The next pictures show that I have actually now fitted the ladder, and made good the hole in the platform. only the finial and spectacle film to add.
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