Model it afterTallinu wrote: I'd be interested in screenshots and/or a blueprint, particularly for a setup where it's just two parallel spawners with circuit-controlled merging. I'd had an idea about doing something like that, since it doesn't seem like there's any way to force trains to stop or slow down before reaching a red signal and then begin accelerating when the other train is about to clear the merge point. I was thinking that a series of signals along the incoming tracks, cross-wired to the parallel line of signals, each line reading its own state and closing if its partner in the other line was closed, might do the job. But I haven't had time to set up and test such a thing.
https://forums.factorio.com/viewtopic. ... n#p280178
The idea is simple. There is a clock that advances every 76 ticks (sorry, remembered it wrong). Then an arithmetic combinator to compute the <clock> % <number of signals> and then each signal is set to be enabled on a different tick. Order the signals so at each junction it always alternates.
For two spawners you just have one signal green for X ticks and then the other for X ticks. Add some rails so the trains accelerate and then merge the tracks.