Paper M–2: Precision Speed Control of a High-Speed Camera

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Publisher: SMPTE — White Plains, NY, USA
Doc Type: Journal Article
Content Type: Original Research
Abbreviated Title: J SMPTE
Volume: 71, No. 1A, pp. 473–477
Abstract: An efficient method for regulating the speed of a high-speed motion-picture camera is described. A reluctance pickup is placed near the sprocket teeth of the drive spindle on a Fastax camera. Each time that a sprocket tooth passes the pickup, a voltage pulse is generated. The amount of time between pulses is measured and compared with the desired amount of time. An error signal is derived that controls the conduction angle for a pair of thyratrons. The thyratrons control the power into the camera motors and hence the camera speed. This sampled data feedback loop allows one to control the picture rate of the camera with a high degree of precision. When power is applied, the camera accelerates rapidly to the preselected speed and maintains this speed until power is removed. This method is not only useful at high picture-taking rates but is also effective at speeds much lower than are normally possible with a high-speed camera. This activity has support from the U.S. Army, Navy and Air Force.
Publication Date: 1962-01-01
DOI: 10.5594/J18177XY
ISSN: Print: 0361-4573
Link: https://doi.org/10.5594/J18177XY
Author(s): David A. Cahlander
Copyright: © 1962 Society of Motion Picture and Television Engineers, Inc.

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David A. Cahlander; Paper M–2: Precision Speed Control of a High-Speed Camera, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at https://doi.org/10.5594/J18177XY

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David A. Cahlander; Paper M–2: Precision Speed Control of a High-Speed Camera, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at https://doi.org/10.5594/J18177XY

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David A. Cahlander; Paper M–2: Precision Speed Control of a High-Speed Camera, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at https://doi.org/10.5594/J18177XY

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<span class="citation">David A. Cahlander; <cite>Paper M–2: Precision Speed Control of a High-Speed Camera</cite>, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962. Available at <a href="https://doi.org/10.5594/J18177XY" target="_blank" rel="noopener">https://doi.org/10.5594/J18177XY</a></span>

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David A. Cahlander; Paper M–2: Precision Speed Control of a High-Speed Camera, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962
doi: 10.5594/J18177XY
url: https://doi.org/10.5594/J18177XY

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<li>
David A. Cahlander; <cite id="bib-10-5594-j18177xy">Paper M–2: Precision Speed Control of a High-Speed Camera</cite>, Journal of the SMPTE ( Volume: 71, Issue: 1A, 1962); SMPTE, 1962
<span class="doi">10.5594/J18177XY</span>
</li>