My stepper motor is powering a roller chain assembly, which moves an object back and forth, over one axis. The time and number of steps it takes to reach either end varies each time, as the whole machine is very unreliably designed.
I'd like to place a sensor on the moving object, and use the position output (distance from either end) so that the motor would know when to change direction. The range of movement is about 35cm, so I could instead need a proximity/force sensor on each end.
From what I understand, there is nothing within the Phidgets range that would do this while being compatible with the digital input on the stepper controller, ie all the distance sensors are analog..
I'd appreciate any suggestions.