| 摘要 |
Film transport device with a film transport sprocket driven by a drive motor whose teeth engage the holes in a motion picture film with play and transport the latter stepwise one frame at a time and final-position it at a film gate. The film transport steps are subdivided into a transport phase (tT) and a position-adjusting phase (tR) in which the film is final-positioned accurately. The transport phase (tT) is divided into a very short acceleration phase (t1, t2) in which a high torque setting (MS1) is set with a steep acceleration rise (t1), and a long continuous drive and braking phase (t3, t4), whose time constant is a multiple of the acceleration phase (t1, t2). This ensures minimum transport noise and film-protective transport.
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