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Author Topic: Problem with Cinemeccanica Platter Hugo Ruiter Film Handler Posts: 4 From: Helmond, The Netherlands Registered: Apr 2005 posted 12-25-2006 11:50 AM                     Our platters CNR3-35N (Cinemeccanica)lately have the problem that they begin to turn very fast. Even if we are not using the platter. We know that the problem is on the PCB witch cares for the platter. The number of the PCB is D09159D. We used a few new PCB's and it's working OK, but there are more platter witch give the same problem. Does anyone know ore we can fix the old PCB's? Or witch part of the PCB is giving the problem? I hope i've explained it well in my bad English. Greatings from Holland. [ 01-04-2007, 06:13 AM: Message edited by: Hugo Ruiter ]  |  IP: Logged Hugo Ruiter Film Handler Posts: 4 From: Helmond, The Netherlands Registered: Apr 2005 posted 01-05-2007 03:19 AM                     Are there no people with a solution for this??  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 01-05-2007 08:01 AM                     Since I don't have the schematic of the control card I will make a guess since the control device is a servopot like the ORC used I would think it is either a SCR or Triac phase control and most likely has a set of trim pots to control the speed range or that the SCR/Triac has failed and is shorted but that is just a guess  |  IP: Logged Alex Cross Film Handler Posts: 34 From: Eccleshill, Brafdord, West Yorkshire, Registered: Dec 2005 posted 01-05-2007 12:52 PM                     Hi, When you say turn very fast, do you mean full speed? Or does it just creep? If flying into full speed for no apparent reason, this could be down to the potentiometer on the feed unit failing. If it's just creeping, the motor cards are temperature sensitive, and need to be adjusted for summer and winter operation. If I can be of further help, just message me. Regards Alex  |  IP: Logged Ron Curran Jedi Master Film Handler Posts: 504 From: Springwood NSW Australia Registered: Feb 2006 posted 01-05-2007 10:22 PM                        Yes, these platters do tend to creep and then run too slow - temperature sensitive. The trimpots for each deck need just a minute adjistment from time to time (about 1 or 2 mm). If they are creeping, slowly adjust the trimpot (anti-clockwise) till the deck stops. You mayhave to adjust it back slightly once the film starts.  |  IP: Logged Hugo Ruiter Film Handler Posts: 4 From: Helmond, The Netherlands Registered: Apr 2005 posted 01-06-2007 03:56 AM                     Hi Alex, Yes i mean full spead (faster then when i put the spead-unit to max)for no apparent reason. Also if there is no film on the platter. So i think it's the potentiometer of the platter. Or maybe the traic? I don't have the problem that it's creeping. Maybe once a year, but then you can fix it with the potentiometer on the spead-unit. [ 01-06-2007, 06:27 AM: Message edited by: Hugo Ruiter ]  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 01-06-2007 12:32 PM                     It will not be the pot since you said by swapping control cards the problem follows the card  |  IP: Logged Alex Cross Film Handler Posts: 34 From: Eccleshill, Brafdord, West Yorkshire, Registered: Dec 2005 posted 01-06-2007 01:48 PM                     Hi, It definatly sounds like the potentiometer. I've just had 2 go in the space of a few months. You can get replacements, but I understand they're a real pain to change. I'm fortunate, I have an engineer who does all that for me. Regards Alex.  |  IP: Logged

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