Mechanics of a lockout spring machine + Testing&Calibrating

[AdamA]

I understand that they lock out when the desired tension is reached.
But does this mean they should only lock out at this tension? As we turn the crank and it moves further from the racquet there is a higher tension. My question is when I was testing the accuracy of the tensioner, I had 58lbs of weight strung through the racquet, with the weights resting on the ground on the opposite side of the tensioner. When I set the tension higher to say 60lbs should the lock ever come out? I would think not. But as we keep turning the crank are we not applying more tension?

How hard/easy is it then to calibrate, is it as simple as turning a screw on the spring?

Im getting closer to stringing my first racquet on this machine, but I am being rather pedantic about it, as I want to make sure everything is just right before I have a go.

thank you,
Adam

[David Pavlich]

That's a bad test. You are not only trying to lift the weight, you have to overcome the friction created in the grommets. You'll get a false reading.

The best thing to do is get a calibrator from a reputable company. I have a Gamma that works just fine. You can use the weights to check you calibrator, but make sure the weights are true. Have them weighed at on a good postal scale.

David