Servo Mod Point Motor : Following on from my previous episode with radio controlled servos as point motors, it did eventually dawn on me that there might be a way of using servo's without the electronic drive and sensing circuitry. A stripped down servo is made up of three main components :- 5volt dc motor, Precision spur gear box and a small PCB with electronics and sensor. By discarding the electronics and sensor, it should then be possible to utilise both the motor and gearbox in a point motor design. Why use a servo ?. Servo's have been around in Radio Control for a long time and there are plenty of 2nd hand on ebay. The motors come in 3 pole, 5 pole, 7 pole and coreless with spur gears in metal or plastic that are precise with next to / or zero backlash. Gearbox and motor are fully enclosed with very little noise in operation and they come in different sizes. What follows is the modification of both a micro and standard servo, short development of a bread board model and modelling eight point motors and one variant in mainly styrene.
