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Author Topic: Frames per second differences? Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 01-15-2003 12:15 AM                    The selsyns keep it locked together, right down to the fraction of a rotation. One can drive the other so the other follows what it does or there can be a master generator (driven by a motor) that runs all three (two projectors and probably one mag sound dummy). With the selsyns engaged you can even inch them in unison.  |  IP: Logged Brad Haven Master Film Handler Posts: 300 From: fremantle, West Australia Registered: Aug 2001 posted 01-15-2003 10:28 AM                     Paul said quote: I never ran a two-projector 3-D setup, but from what I understand, only one projector motor was used, and a selsyn drove the other projector with the main motor free-wheeling. I understand that both drive motors were not used, because they would fight each other. If they ran at different speeds, they would both eventually overheat with a distinct possibility of burning up. I was lucky enough to run dual projector 3-D (dial m for murder) in the mid nineties and the above was the way we did it.  |  IP: Logged

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