Walschaerts valve gear animation2/2/2023 What I attempted to do was to minimise this rise and fall so it looks almost right, this required that I move the combination lever so it rotates equally either side of vertical for the best result. There is no need to let the piston rotate at all, BTW. I too tried letting the valve stem rotate slightly, the distance to the fulcrum is largely immaterial since the stem is still rising at the combi-lever end. So, we eagerly await your blend file Sir!Ĭheers, am not sure the mechanism stands up to scrutiny if the combination lever rotates about its mid point, I think it should rotate near to the top end, or the valves won’t work properly. You cannot make that sort of comment without providing the goods With complex mechanical rigs like this it is often better to use a bunch of empties that interact with each other via expressions in drivers. I am not sure if bones and IKs are the right solution here.
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