On Saturday, August 29, 2015 at 4:01:13 PM UTC-7, Jim Wilkins wrote:
wrote in message
...
One thing leads to another. Starting with Arduino , going on to
accelerometers , and finally to balancing. Or at least thinking of
using a cheap accelerometer and maybe a Arduino to do dynamic
balancing.

Some years ago ... I made a fixture
to do it myself more accurately.

The fixture is a disk that centers in the hub, tapped through the
center for a threaded rod with a conical recess in the end, which
rides on the upright balancing point.

When the balance point and recess were set just barely above the
wheel's center of gravity it was sensitive to around 1/4 ounce, but
unfortunately not rugged enough and I had to remachine the point and
recess after each balancing session.

If you'd used a live center for the cone, and a wider-than-60-degree
socket, it might last longer.