Tree Climbing Robot

Step 15 Mounting the Spine, cont.

For the spine to work, it must pass through a nut that is fixed to the other segment of the robot.  For ease of mounting, I used a large 1/2" long nut.  To fix it to the segment of the robot, I cut two ~4" lengths of aluminum, drilled them to match the bolts that hold the acrylic piece,  and mounted them through the screw holes, across the frame.  These will later become supports for linear slides.  I then drilled four more holes around the center of the back of the robot, with enough space between them for the nut to fit.  I cut a piece of aluminum to run along the back of the robot, and drilled it to match the holes.  I then placed the nut on the back of the robot, placed the bar of aluminum on top of it, and bolted through the bar, to sandwiched the nut between the two pieces of aluminum.  Finally, I threaded the rod through the nut.