With these tops, I improved a detail of my turning technique;
when I put the top to be turned on the chuck, I always check not only for the centering but also for the tilting of the top axis relatively to the chuck axis.
Theoretically if the flywheel is leaned on the chuck, it should be perfectly parallel to it, but measurements show that this is not true and that it is normal to have some hundreths of mm of misalignment. In the past I corrected it with little wedges between the flywheel and the chuck, which worked but was not very practical. Now I built a plate with four screws to be inserted between the top and the chuck.
The plate leans on the chuck through the screws, by which I can fine tune with ease the parallelism of the plate, (and of the top), to the chuck.
I am so happy of this improvement that I wanted to share it with you.
It may seem unimportant to have a little error in the parallelism between the top axis and the chuck axis, but the consequence of this error is that, when I turn the bottom of the top, one side of the flywheel becomes slightly thicker than the opposite side, which is sufficient to make the top a bit unbalanced.
