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Author Topic: Platter Drive Motor Diode Richard May Phenomenal Film Handler Posts: 1057 From: Floral Park, NY USA Registered: Aug 2004 posted 05-25-2009 08:46 PM                     So can you just hook up the make up table and run the motor for an hour at almost high speed? Is that enough to break it in?  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 05-25-2009 09:24 PM                     You have to seat the new brush on the commutator, the new brush has "teeth" on it that wear down relatively quickly so the brush end curve fits the commutator shaft properly. If it doesn't, you have a small contact area and poor performance. On the actual platter, the motor never gets close to full power, the variac might get to 50% line voltage maximum - the geometry of the arm crank dictates this. Using the makeup table you can get 100%. The break-in routine is printed on the brush box if you are using the Grainger brushes - 1/2 hour at 50% voltage and 1/2 hour at 75% voltage.  |  IP: Logged Richard May Phenomenal Film Handler Posts: 1057 From: Floral Park, NY USA Registered: Aug 2004 posted 05-25-2009 09:40 PM                     I have a few theaters that have the newer black motors to be put in. I will check the speed before I break them in and then check it again after.  |  IP: Logged

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