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Author Topic: How do you test a platter motor? Frank Dubrois Jedi Master Film Handler Posts: 896 From: Cleveland, OH Registered: Mar 2005 posted 09-18-2006 11:10 PM                    If I have a platter motor in a box, how do I test it to find out if its good or not (assuming I dont have a platter to hook it up to). We have a platter motor that was apparently new, but when plugged into a platter, it never gets up to speed. I plug an old motor into the same plug, and it works fine. The motor is supposedly new or rebuilt. Can a motor be tested without taking it off the platter? Pardon the noob like question, but I was curious if there was a faster way other than swapping motors around and retiming everything. Thanks.  |  IP: Logged Dustin Mitchell Phenomenal Film Handler Posts: 1865 From: Mondovi, WI, USA Registered: Mar 2000 posted 09-19-2006 01:45 AM                     What make of platter?  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 09-19-2006 02:36 AM                     Kinda what I do when I rebuild my platter motors is to plug them into any deck's socket and see what spin I get out of them - both Christies and STRONGS.. ...sounds like a brush issue on why the speed differences from the one in the box to the one already mounted for use. If you're the kind who has an bent for electrical creations, one can built an extension cord to connect between motor and socket to where you can just move the cord around to any motor, plus use the cord as a test cord for a motor that isn't mounted. -Monte  |  IP: Logged Dustin Mitchell Phenomenal Film Handler Posts: 1865 From: Mondovi, WI, USA Registered: Mar 2000 posted 09-19-2006 02:46 AM                     I ask what kind of platter it is because when I got a new motor for one of my Strong AP-3 platter about 2 years ago a sheet came with it explaining that newer motors were manufactured to higher tolerance and thus I needed to fit the motor with a larger drive shaft (provided). My platter were made in 1997 so I assumed it didn't apply to them but I was mistaken and had to take the motor off and put the different shaft on to get it timed properly.  |  IP: Logged Frank Dubrois Jedi Master Film Handler Posts: 896 From: Cleveland, OH Registered: Mar 2005 posted 09-19-2006 08:50 AM                    They are strong platters. The motors actually SOUND like their turning slower. When put on the platter, they cant seem to spin the platter as fast. My only option would be to slow down the used motors to spin at the same speed as the new ones, but that just doesnt seem right.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 09-20-2006 12:07 AM                     Frank - is your speed concern for takeup or rewind..and which version is your STRONG units - the A3 (with the rotary mode switch), or the AP-3 (with the toggle switch below the film return roller mounted on the tower..) ? My tip on platter motor rebuilding, I found out, now needs this larger drive collar for the newer Ametek/LAMB platter motor and here is the part number for that spindle drive collar: P/N 1190 and you have to ask for the 1.94 length spindle collar. -Monte  |  IP: Logged

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