This is a basic motorized linear bearing that can be used for things like camera sliders. This project is only for the mechanical portion, but includes the stepper motor. You can edit your cart if you want a different length of MakerSlide. Be sure to have about 1 foot longer belt than MakerSlide
Assemble the motor sub plate per the image below. Consider which way you want the wires to protrude from the motor before you mount it.
Attach Sub Plate to Main Carriage
Attach the prior assembly to the carriage per the image below. Be sure to note the orientation of the carriage. It is not symmetrical.
Attach the V Wheels
Attached the v wheels as shown. Set the eccentric spacers so the wheels are in their widest position. After the carriage is mounted to the rail they will be moved to contact the v rail.
Assemble the carriage to the MakerSlide
Slide the carriage onto the MakerSlide. Adjust the eccentric spacers until they v wheel is just contacting the v rail. You do not want excessive pressure or you will damage the wheels.
The belt is threaded around the pulley and idler wheels as shown below. Firmly attach one end of the belt to the rail. When you do the other end, tension the belt as you tighten the last belt clip.
Select a control system.
The selection of the control system is left to the end user.
There is a very basic open source one available though. This has been tested with grbl shield, the buildlog.net stepper shield and the ITEAD stepper shield. These all use an Arduino as the controller. Some other boards with built in Arduinos would work as well such as the G1 or X1 from www.pancatt.com.
For best results, dial the current as low as you can before motion stalls. Lower currents will make the motor run quieter. Set it up for highest microstepping too.