On Aug 5, 10:46*am, wrote:

* * * The 3 axis system achieves this by a careful series of
amplitude measurements followed by vector calculation of the
results. The penalty is that it loses the quadrature independence
of the orthogonal 90 deg balancing axes - fine tuning by
cheerfully adding a bit of weight to see if the balance gets
better or worse is no longer an option.

* * * * * * * * * * * * Jim

I have not tried either method yet. My instinct is that the 3 axis
system could do fine tuning by first doing a balance using a fairly
large test weight. And after completing the balancing, do it all over
again with a test weight about 1/10 of the original test weight.

Dan