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Topic: Century JJ slow startup
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Michael Schaffer
"Where is the Boardwalk Hotel?"
![](http://www.film-tech.com/ubbmembers/1204d.jpg)
Posts: 4143
From: Boston, MA
Registered: Apr 2002
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posted 02-09-2007 03:23 AM
I have a combo 35/70mm machine here whose motor recently exhaled its life when the intermittent seized up. After receiving the rebuilt intermittent and replacement motor (the original was an old GE one), a Ballantyne model # A4R17FB2B - really made by Bodine, of course -, I installed both and everything runs fine except the motor starts up really slow. A slower rampup is of course welcome, but this motor does take its time. Once it's started up, it runs fine. I did check that everything is mechanically free-spinning, that all the gears are in good condition and lubed, that the intermittent gear is not to tightly meshing with the gear on the vertical shaft, but the same slow startup also occurs when I disengage the intermittent. The motor is positioned so that the belt is reasonably tight with about 1/4" play, and the belts are in good condition with no bad teeth or slippage. Could it be that pulling the whole mechanism including the 70mm soundhead on top is a little too much work for this type of motor? It has the correct rpms (1800, same as the old one) and I am using the old pulley and flywheel.
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Michael Schaffer
"Where is the Boardwalk Hotel?"
![](http://www.film-tech.com/ubbmembers/1204d.jpg)
Posts: 4143
From: Boston, MA
Registered: Apr 2002
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posted 02-09-2007 04:37 PM
The motor only says "115V" on the type plate, it doesn't give 230V as alternative, but the wiring diagram gives two options for low and high voltage, and I wired it for "high". Could that be the mistake? Some motors list various operating voltages, then the choice is clearer. There is a box mounted below the motor support bracket, but I thought this was for interlock. The motor wiring coming from the concole goes into that and from there to the motor itself. Might it be necessary to bypass that? There will be no more interlock in this location anyway because they mostly play digital now, and the digital projectors are in the way anyway, so some massive measures would have to be taken to reroute the interlock paths. But, like I said, that isn't likely to be needed in the future anymore anyway.
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