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Author Topic: Simplex 5 Star Soundhead pulling damper roller too hard Rick Long Jedi Master Film Handler Posts: 759 From: Toronto, Ontario, Canada Registered: Nov 1999 posted 03-15-2005 03:23 AM                     It is possible for the projector head to run below speed if the bottom nut on the vertical shaft is not tightened securley. A quick test to see if this is the problem, thread a loop through the projector and soundhead, leaving a large loop between the projector and soundhead. Run the machine and see if this loop gets smaller in size. I had this happen once on a 5-star /1050 combination. It is necessary to remove the vertical shaft to correct this problem.  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 02-25-2009 12:36 PM                 It has been 1443 days since the last post.  |  IP: Logged Eric Robinson Jedi Master Film Handler Posts: 538 From: Santa Rosa, CA Registered: Jan 2005 posted 02-25-2009 12:36 PM                     While doing some belt research, I noticed the 5 Star manual has a table which shows which belt and pulley combinations you need depending on various motor speeds. The motor speeds are: 1000, 1200, 1500, 1750, 1800 I am wondering why different speed motors are employed? Why not just use one motor speed?  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 02-25-2009 12:53 PM                     Prob due to different line frequencies and voltages that is around the world. Also, for different types of motor applications. I've seen induction motors used on 5 stars.  |  IP: Logged John Walsh Film God Posts: 2490 From: Connecticut, USA, Earth, Milky Way Registered: Oct 1999 posted 02-25-2009 04:29 PM                     Sync motors for interlocking was an 'optional' motor  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 02-25-2009 06:40 PM                        1750 more or less in USA; 1800 for 60Hz sysnc. 1500 is 50Hz sync Louis  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 02-25-2009 07:44 PM                     Both Western Electric and RCA often used 1200 for there sync systems in the past for 60Hz mains  |  IP: Logged Robert Minichino Master Film Handler Posts: 350 From: Haskell, NJ, USA Registered: Dec 2005 posted 02-25-2009 07:57 PM                        1000 and 1200 RPM are 50 and 60 Hz synchronous 6 pole motor speeds, 1500 and 1800 are 50 and 60 Hz 4 pole synchronous motor speeds, and 1750 is 60 Hz 4 pole induction motor speed.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 02-26-2009 08:04 AM                     Of course knowing Wrong's rediclous parts pricing of recently it may very well be less expensive to just use a three phase motor and vari-speed drive unit! Mark  |  IP: Logged Eric Robinson Jedi Master Film Handler Posts: 538 From: Santa Rosa, CA Registered: Jan 2005 posted 02-26-2009 10:29 PM                     Thanks, I always learn something new here.  |  IP: Logged Jim Cassedy Phenomenal Film Handler Posts: 1661 From: San Francisco, CA Registered: Dec 2006 posted 03-02-2009 11:57 AM                     quote: Stephen Frazza I pretty much took the whole projector apart- I replaced every bearing in it, I replaced the belts, I even replaced the pulleys. I beleive the technical term for this is a "projectorectomy" (not to be confused with a projectoroscopy, which we won't go into here)  |  IP: Logged Randy Bowden Expert Film Handler Posts: 146 From: Portland, OR, USA Registered: Aug 2000 posted 03-03-2009 11:08 AM                     I had a theatre with this same problem recently. The projector head was not running as smooth and quiet as it should, so I replaced the intermittent, Problem solved. Sometimes projector head problems can manifest symptoms in the soundhead.  |  IP: Logged

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