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Interlocking: Difference between revisions
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Added dash to "Simplex X-L."
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When using purely mechanical projectors, each projector was run on a fixed-RPM motor wired on the same leg of the electrical system to keep them running at the exact same speed. The start times were synchronized through a centralized automation system that fired commands to start each projector simultaneously. This works well for projectors that use timing belts, such as Simplexes and Kinotons, but projectors that are driven by V belts, such as Centuries, would fall out of sync as the belts wore. Some electronically controlled projectors, such as the Kinoton E series, can be programmed to run in perfect unison without these systems in place. | When using purely mechanical projectors, each projector was run on a fixed-RPM motor wired on the same leg of the electrical system to keep them running at the exact same speed. The start times were synchronized through a centralized automation system that fired commands to start each projector simultaneously. This works well for projectors that use timing belts, such as Simplexes and Kinotons, but projectors that are driven by V belts, such as Centuries, would fall out of sync as the belts wore. Some electronically controlled projectors, such as the Kinoton E series, can be programmed to run in perfect unison without these systems in place. | ||
In some cases, projectors were interlocked without adequate synchronization. In this situation, a movable loop accumulator could be placed between each projector, allowing the tension to rise and fall within a tolerated range to compensate for out-of-sync motors. Some projectors, such as the [[Simplex | In some cases, projectors were interlocked without adequate synchronization. In this situation, a movable loop accumulator could be placed between each projector, allowing the tension to rise and fall within a tolerated range to compensate for out-of-sync motors. Some projectors, such as the [[Simplex X-L]], have manual brakes that can be used to slow down the faster motor to relieve tension on the loop accumulator. This was not good for the equipment, and was usually done for temporary or improvised interlocks. | ||
==Risks== | ==Risks== | ||