Mini-Mendel X-axis
Carriage
This image shows the parts that are used to build the carriage. Note: Only 8 bearings are shown, but 10 are required.
Install the bearings.
Install the two bolts that will hold the extruder-bracket. The head of these bolts will become trapped later and a pair of nuts will hold the bracket down.
Install the 4 nuts to hold the belt clamps. This image shows the carriage partially assembled, but the nuts have to be inserted before it reaches this step.
Connect the three parts that have bearings on them. Leave the bolts that hold these in place a half turn from fully tight. Try running a smooth rod through the 6 bearing side. It should slide smoothly and turn all 6 bearings at the same time. Do the same on the 4 bearing side, but it will be harder to keep the rod centered as it should be able to slide side-to-side.
Install the extruder bracket.
Install the belt clamps.