Algodoo

Very cool! definitely a lot more elegant than stopping the scene and rotating the timing wheel slightly by hand.

Interesting scene! I can see where this would be very useful in a scene where accurate synchronization between the two wheels is important.

I wonder how tightly controlled the actual phase angle difference between the two wheels is. In other words, is there elasticity in the stretched hinge that would cause phase lead or lag between the two wheels under varying load?

If that could happen, then a nice embellishment to this scene would be to add a readout of the "actual" (measured) phase angle difference, in addition to the "setpoint" phase difference that you currently have.

SUPER COOL I may have to use this in my 3 rotor
My scripting is pretty lame was going to use
mechanical means to do the same thing
Thanks for showing me the error of my ways in the hinge stretch thing

Why in postStep? Just set bendTarget = {scene.my.value}

Kilinich,

Q: Why in postStep?
A: I had a reason, but it's long forgotten. I'll assume that your suggested method is more efficient and use it unless I hear otherwise.

Thanks for the feedback.

Xray,

Q: Is there elasticity in the stretched hinge that would cause phase lead or lag between the two wheels under varying load?
A: Yes, this is set by the bendConstant property of the hinge. In this case I set it to +inf.

Q: If that could happen ...
A: I will test for lag and post results in this comment.

P.S. The average lag is zero if bendConstant = +inf. The variation in the lag is relatively small and can be reduced with higher sim.frequency or slower motor speeds.

Yup, and I saw the effect of +inf bendConstant. I placed a heavy frictional load on the driven wheel and slowly increased it until I was able to see a change in the phase angle. Well, up to a certain point, I saw no change at all. Then, like hitting a brick wall, the wheels simply stopped turning.

This is a good educational scene that, I believe, would be useful in a basic Physics class.

HMM is the phase angle in RAD
I have tried to use this and it makes no sense
Gimme degrees and RPM