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Topic: MUT problems
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James Faber
Film Handler
![](http://www.film-tech.com/ubbmembers/2796.jpg)
Posts: 66
From: Des Moines, Iowa , USA
Registered: Nov 2004
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posted 12-29-2004 04:15 AM
Recently I've been having trouble with out MUT not breaking down properly. We have Speco platters, the 270 model, I believe, and the newer MUT, the one on wheels. When I turn the speed up, it breaks down normally, but only for about 100 feet, then it just stop entirely, and I can smell rubber burning.. When you turn the speed all the way down, the platter motor starts to take up slightly. Any idea what might be wrong with it? I haven't had the chance to open it up and look at it yet, but I was wondering if anyone has had this happen to them before, and what I should look for when I do open it up?
The only temporary solution I've been able to come up with is to unplug the platter motor, which I know is probably a bad idea, but there was no other way to everything done on time. Also, I've tried it on several platters, so I don't think they are the problem.
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Monte L Fullmer
Film God
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Posts: 8367
From: Nampa, Idaho, USA
Registered: Nov 2004
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posted 12-29-2004 05:02 AM
You might have a problem with the button control panel with the bank of buttons-one button isn't completely separating the current from the platter motor, esp where you mention of the platter creeping slightly. Current might be backpedaling in the system due to this. You have to remember that when a platter motor is going in reverse, you, in a way, have a DC generator creating current,esp if the field (stator) winding is still receiving some sort of voltage or load from an outside source.
No, there isn't anything wrong with disconnecting the motor power from the tower since the motor's drive tire is giving some rotational resistance for a even film rewind. For on breakdown, the motor is completely disconnected anyway with the "makeup" button being pressed in. But do check this out as quick as possible.
These ideas above are just logical assumptions, for the LP-270's that I've operated with (and my MUT was the LP-271) never had this sort of problem, just the plug-in, 8-pin diode thingy would short out at times taking out the fuses in the base.
-good luck - Monte
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