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. Probably will never actually do anything, but thinking
about things is better than daytime TV.

Searching on the internet I ran across reference to a Yakimoff
balancer which was said to be able to build one at home. But no
actual information about it.

So does anyone know what a Yakimoff balancer is? Know of a reference
to it.

Not a panic. Just an inquiring mind wants to know.

Dan

===

Some years ago one shock mount on my truck broke from rust, in a place
I couldn't easily see. I thought the wheel vibration was from a lost
weight and had it rebalanced, without success. Then 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.

As I was adjusting the balance point to the wheel's three dimensional
center of gravity to increase sensitivity I noticed that it could also
dynamically balance the wheel by rotating it. If I statically balanced
it with a weight on top on one side and an equal one on the bottom on
the other it would wobble when spun, as centrifugal force pulled both
weights toward the central plane of the center of gravity.

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.

I can visualise or draw this more easily than put it into words. But
see how clearly Wiki explains dynamic unbalance:
https://en.wikipedia.org/wiki/Tire_balance

And now, back to the problem of delicately positioning a 1400 Lb log
on my sawmill to square it.

-jsw