I accidently put Jetstream in the title when it should be Jetsonic. I looked ovet the bars I have and dug into this more.
This one is a JS1A series A1. I would think it is an early version because this seems like the least effective setup. I noticed 3 different sensor "gears" on some of my bars. This one has a ledge so the piston on the solinoid will stop the rotation. It has the motor brake components so not sure why it would need a physical lock. What I presume is the next evolution is a small half circle for the switch to locate home. The shape and small size appear to be more jarring on the switch. It has to move in and out pretty quick vs easing or ramping. The third is a bit wider so it is a bi smoother. I think they made one with a flat spot so it just glides in and out.
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I had to swap a couple of parts to get it running, including the motor. I started with individual component testing then basic assembly to get the whole system working. In the video I started by having the sensor back too far to make contact. This way I could see it functioning during testing. The rod in the solinoid does a few things. It acts as a physical stop for the home position at rest, tells the system where home is when you turn off the rotators and activates the lighting relays when activated. Seems much more complicated and potentially problematic for the whole system set up this way. I could see the appeal if a motor break was not incorporated into the system. This would stop the rotation instead of them coasting to a stop.
These are just my observations.
I did also notice this bar has aluminum baseplates vs plated steel like the Series A2 and A3 I have.
Hope this helps a bit
@JohnMarcson let me know if you have any other questions.