This mounts to the rear of the y-bed on a MakerFarm printer and provides a strain relief point for the heat bed and thermistor wiring.
The design originally focused on providing a support with a curved arc that matched the round tab extension on the wood type MakerFarm y-beds. While the MakerFarm tab is intended as a wiring strain relief point, moving the cable tie location farther from the edge of the y-bed provides a better strain relief approach, especially when large gauge wiring is used for the heat bed. In addition to the arc-type support, the final openSCAD script can provide a support with a simple block that presses against the straight edge of an aluminum y-bed. Use of the block-type support requires mounting holes to be drilled into the aluminum y-bed.
Selection between the two types is a parameter in the openSCAD top level geometry. Changing between the two types typically also involves changing the parameter for the y-bed thickness to match the wood vs. aluminum bed thickness.
The two STL files provided are for an arc-type support for use with a 6-mm thick wood y-bed and a block-type support for use with a 3-mm aluminum bed.
The cover photo shows the arc-type support installed on an 8-inch MakerFarm i3v printer with a wood y-bed, using 1/2-inch #4 pan head screws. M3 x 12mm screws would also work. Compatibility with other size i3v printers or printers with an aluminum y-bed has not been tested.
The openSCAD file has been extensively commented for those wishing to tailor the strain relief bracket.
NOTE: For a version that raises the strain relief surface higher off the print bed and offers recessing mounting screw heads into the bracket, see the remix at http://www.thingiverse.com/thing:2010943.