The controller has 3 settings that produce different DC voltages for the motor and produce different speeds to the spindle/shutter that results in different shutter speeds. The videos below show the 3 speeds and all these clips have the shutter set to 170 degrees. My first attempt at the linkage had the effect of a tiny amount of open shutter …

VERY great step forwards but I got the camera motor controller working and rigged it up to the camera to see how it runs and it runs smoothly, beautifully, accurately!!!. The controller has loads of speeds that turn the main spindle/crank at different speeds so that means different exposure lengths AS WELL AS the different lengths provided by the variabe …