my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Simplex 5 Star Soundhead and Motor Shaking

Author Topic: Simplex 5 Star Soundhead and Motor Shaking Aaron Mehocic Jedi Master Film Handler Posts: 804 From: New Castle, PA, USA Registered: Jun 99 posted 03-20-2004 01:24 PM                     I can't tell exactly what is causing the shake other than it pulsates like an old steam engine. Sometimes the motor will jump but all the bolts holding it in place are tight. I've checked the belt and belt tension and cannot see anything out of the ordinary. Could it be that I might be loosing a bearing on the sprocket shaft? This has got progressively worse over the last couple of days. One thing I should mention that may help the diagnosis is when I apply forward pressure on the motor with my hand, the shake goes away and the soundhead runs fine. Now I don't want to readjust the bolts holding the motor in place because that may indeed destroy the bearings if these aren't the immediate problem. Any help is appreciated.  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 03-20-2004 02:32 PM                    Change the belts....They may look good but may have problems not apparent. I have had this problem before and changing the belts solved the problem. Also when you have the belts off clean out the drive belt groves on the Soundhead drive wheel to get any oil deposits out of the groves this will help prevent the belt from jumping the groves.  |  IP: Logged John T. Mellor Film Handler Posts: 52 From: Htafield, Pennsylvania, USA Registered: May 2000 posted 03-20-2004 03:43 PM                     also when you change the belts check to see that the fly wheel bolts are tight I've had quite a few loosen . while you have the belts off time to check all the shafts and bearings. The idler pulley also goes bad frequently.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-20-2004 10:16 PM                     Yea, I'd be willing to bet that there is a chewed up main drive shaft, bad bearings, and a wobbling pulley. If thats the case its best to replace ALL the bearings in the entire sound reproducer. They're relatively cheap bearings and if this is what you find wrong then an overhaul is well worth the time spent. When you order the new belts check if you hvae square tooth or round tooth in there.... Mark @ CLACO  |  IP: Logged Rick Long Jr Expert Film Handler Posts: 211 From: Toronto, Canada Registered: Jul 2000 posted 03-21-2004 08:30 AM                     Make sure you have the right belts installed. Strong changed the belt type in the early 90's from the 260 XL square tooth belt to the new 51-05014 belts. They run VERY rough with the wrong belt, but can be forced to smooth out with a lot of tension - a BAD idea. Could just be crud in between the teeth on the motor pinion though.  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.