James Ratnarajah2

Hello @Cerbera et all 🙂 I think I figured out my particular issue. As we said, the scene was jittery and unstable. Looking into the other setup I made last night, I tried it at large scale and all seemed to work as expected. So, I mixed both things together, that is, making a cable with the diameter I needed (3.5mm) but made it really long, like 100cm long. This seemed to solve the issue. No energy 'being imparted' at the beginning, stable and reacting to forces like turbulence pretty well. So, I think this is the issue: the rope dynamics system doesn't seem to work well at small scale. I am unsure if this is by design or a bug, but for my purposes this is the best solution I can come to—make ropes super long and the objects used as connectors to be quite large as well. Hope this helps others. Thanks, James

Thanks for the reply, Cerbera! I looked into those things and turning the banking off has helped the spinning, so thanks for that!!! I have tried the other things you have said and, yes, it has lessened that energy being imparted to it (for want of a better way of putting it) but not eradicated it - like you said. I have tried another setup, where I use connector tags with the rope simulation instead of rope belts. In this scenario, the problem is exacerbated which is both a good thing and a bad thing. Bad, in that it's still a similar issue, but good in that in seems to be pointing to the problem... even if I can't understand the solution. As you can see, in the attached scene file, the drawn connections are 'pulling' just at the first frame (sending a shockwave through the rope spline). This seems to be pointing to something having an effect on the dynamics, but I just can't figure out what... StringTest_V3.c4d

Hello all! First time posting to the forum 🙂 I am facing an issue and tearing my hair out trying to find a solution. I am building a scene where a cable plugs into a device. I want to use rope dynamics to achieve the effect of the cable floating in the air and reacting as the device rotates and pulls on it. Using connector tags and rope belt methods, to fix both ends of the rope in place, results in the rope spline spinning by itself. This is noticeable when I apply a sweep to it with a circle object. I am assuming there is some sort of force of self-collision happening, which is imparting an impulse to the spline which is making it spin. I also assume that the small scale I am working to, the rope diameter is 3.5mm and length approx. 4cm may have something to do with it. I tried it at a larger size and doesn't seem to be happening as much. I have tried reducing the scene scale, but no joy. I hope I have given enough information to garner some thoughts or solutions. I will also attach the project file so you can see for yourself. Many thanks in advance, James StringTest_V2.c4d