Model Railway Electrics - Arm Signals
How to Motorise a
Hornby Arm Signal (untested)
Light signals are easy to change even when out of arms reach
with just a flick of a switch, but how do you change arm signals
that you cat reach. Hornby no longer produce a point motor that
can control Hornby arm signals but there is a way of using a new
point motor to take its place. The diagram below illustrates how
this is done with a Hornby single arm signal (R171 or R172).
Position a point motor under the base board inline with the signals control arm
(See diagram). If you don’t want or can’t position the point motor below the
board you could use a point motor housing or hide the point motor in a building.
Take a short length of metal wire and make a little hook at one end by bending
it with pliers. This should then fit into the hole at the bottom of the signals
arm. Glue / Solder / Stick the other end to the point motors arm which should be
sticking out above the board. If you are using a point motor housing you may
want to bend the other end over with pliers and fit it into the hole in the
housings moveable arm. You will need to cut the wire to length after you have
done any bending and checked its length.
And there you go a motorised signal (hopefully).
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