Head Mechanicals: Part 1 Gimble Assembly

Gimble Assembly defined

The gimble as its term implies is a mechanical device that rotates as well as moves around 20 degrees in any direction allowing the dome head to move around on the top of the ball / cheese.

The gimble consists of 1 central 180 degree servo that will rotate the head, 2 BB+ servos (hi torque) that will push and pull the gimble body around thus moving the head on the larger ball.

The end of the gimble consists of a casing holding N52 magnets that are strong enough to hold up to 50lbs of weight.  The dome head will have 3 other N52 magents that will pull against it to hold the dome onto the body as it moves around.

The assembly minus the body and head areas as shown above.  This assembly will magically move and turn the dome around on the body.

Started the assembly with the printed parts from back in June 2016...

The gimble body pieces connected don't allow too much room for the bearings... this will require either:

1. Boring out the bearing holes
2. Purchasing smaller outer diameter bearings

Here is another look at the bearings and their fitting between the two halves...

You can see the seam there due to the bearings being too large on the outer diameter.

The inside bearing... and the seam

A hitec servo will turn the dome's head from inside the gimble.

The tension cady connects the 8mm rod from the dome magnet assembly to the servo via the hat that connects to the servo gear ratio.

Another view of the servo 8mm rod that will drive through the magnet assembly