Time-Lapse Rail

[This project is a variant of the Chronos Project.](http://sourceforge.net/p/projectchronos/home/Project%20Chronos%20Home/)

The time-lapse rail is based on an Igus WS-10-40-10 and carriage which uses polymer bearings for smooth movement. With this as the platform a stepper motor, lead-screw and anti-backlash nut (for greater accuracy) can be used to turn it into a time-lapse system. By using a lead-screw and not a belt to move the carriage means when the rail is oriented vertically, the motor doesn't need to apply much extra torque in order to move the carriage. The lead-screw locks the carriage in place whereas a belt system needs to keep the motor energised to stop the camera falling. Only a small stepper motor is needed to run the rail and the system I have made is based on the Chronos Lite.

The controller is powered by an Arduino Uno with a custom shield made from the Chronos Controller's open source schematic. I tested out the circuit after soldering in a RJ45 to link up wit