Springs & mechanism timing

What is your working theory as to what besides the spring is causing the difference? If I understand your setup correctly, the spring is the only source of energy for your motion. An increase in spring force indicates an increase of stored energy (do you have historical data on actual spring forces, or are you only now comparing your measurement against the manufacturer's specs?). An increased release of potential energy required an increase in kinetic energy (absent additional losses, of course). If by "the timing had increased by 10-15%" you mean that "the time for the linear motion between 2 fixed points is measured" and found to be decreased, what else could have caused the velocity increase?

Hello, I clarify:

1. Yes, the spring's potential energy is the only source of energy for the motion.

2. There is no historical data available on actual spring forces, we are only comparing the measurement of spring forces at the manufacturer's works with our/manufacturer's specs.

3. By "timing had increased by 10-15%", I mean the time for the linear motion between 2 fixed points was increased (ie: if actually it should be 100ms, it was coming as 110ms with the spring which was found to have higher potential energy)

So, if spring was actually the cause, the timing should have decreased and not increased, isn't it?

"Perhaps historical springs were even further out of tolerance than the one you checked"

That's the sort of scenario I've come across before. How are the springs specified? Do they even have an "upper limit"?

If it's easy to do the best way to resolve this is to try an old spring with a new mechanism and vice versa. See which component the fault "follows".

Can a higher spring pressure cause a quicker travel...?

Can a heavier draw weight on a bow throw the arrow faster and therefore further..Of course it can!

Have an adjustable seat for the spring so you can adust it's tesnion...much easier than trying to get precision springs!

Del

At compression your spring may exert force "X" but it may vary as the distance changes. -> different spring rate than expected.

Is this a coil spring or a gas spring?