Y Belt Tensioner for RepRap Graber i3

Simple piece to substitute the wooden one and give some belt tension adjustment to the Y axis of the printer. I fell that it is much easier to adjust the tension with one bolt at the front of the printer than it is with the 3 ones on the motor.

Edited to add the capability to choose the size of the screw and nut used to regulate the belt tension. With M4 was way better, but feel free to choose!


Added version 2. Now it is sturdier and with less wall to the belt grab on.