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The bronze gears get hammered to a pulp in those 1040's, especially when the projectionist bumps his machine forward with the motor switch.

As a passing thought, bumping the projector forward with the motor should never be done on ANY projector! A Piggly Wiggly No-No! Newbies, please heed.

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And you "should" brush and floss after every meal.

As long as the motor gets up to speed and runs for a couple of seconds, I'll put the strain on the motor. Refrigeration motors cycle thousands of times, pump motors for wells cycle on and off regularly, even the fans in automobiles are now motors that cycle on and off.

Projectors now start once per show, rather than three or four times, like they used to have to on C.O. systems. A single up-to-speed bump is within spec. and will help a newbie detect problems that otherwise might not be seen (or heard) at the low speed of a manual crank over.

I don't hear Scott and others suggesting making up a print to avoid having to start the motor more than once per show. <evil grin> Your turn.

Refrigeration motors, pump motors for wells, fans in automobiles etc., are directly conneted to the whatever is being driven. Not so in projectors, with several gears (each with some amount of backlash) between the motor and the top sprocket.

Personally, I feel a newbie should be taught to thread correctly _without_ even turning the motor at all. THEN, he/she can turn the motor over by hand to double-verify. It should only take a few frames of spinning. IMHO.

If bumping the motor is to verify threading, That's a different story.

I call it "Hammering" the projector forward. That is something that simply should not be done, and that procedure is simply unacceptable..

Again, as I have stated previously, if the motor has to be started, make sure it comes up to full speed before it is shut down.

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I am a strong advocate of running down the thread up section of the film rather than threading on the countdown. Basically, keep yer hands off of irreplacable stuff. Once one gets to the ID section of the leader prior to countdown, one shouldn't touch...if this policy is followed, the leader and the print itself doesn't get dirty and oily. This is true for either platter or changeover.

I do not advocate "bumping" the projector since as others have pointed out, it is not good for the motor nor the gear train. On an older Century JJ with heavy steel shutters, starting and stopping puts a bunch of strain on the GR-207 gears.

For those changeover theatres that have Dolby digital or SDDS, I suggest installing a run down button that won't trigger the digital processor to make a sound changeover.

Steve

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"Old projectionists never die, they just changeover!"

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