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Author Topic: super simplex locking up Dave Ganoe Expert Film Handler Posts: 119 From: Point Marion, PA Registered: Jun 99 posted 03-02-2004 08:43 PM                     I've got a super simplex that I changed the intermittent sprocket today and since then the machine will only run for about 25 minutes before stopping dead. After waiting for about 3 minute no more than 5 it will work fine again. No new noises since I change the sprocket and it actually runs quieter now. I wish now I would have not bothers changing it as I dont know what to do. Anyone ever have this problem before? Hope someone can help. Thanks.  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 03-02-2004 08:53 PM                        The motor is overheating and causing a thermal switch to trip shuttung it down.  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 03-02-2004 09:10 PM                     I agree with that but why should the thermal protection in the motor kick off after you have done something that should have alleviated excess load on the motor and should have made it run better? Maybe you're having an incredible string of bad luck and the motor has shit the bed on you at the same time as the intermittent decided to puke. Maybe the jam-up from the intermittent blowing its guts trasked the motor. On the other hand, I think you should verify that the projector tuns over by hand easily and smoothly. It could be something as simple as a belt that needs to be adjusted but you should also check your backlash/mesh on the gears you worked on. Also I would be concerned that the jam-up didn't strip or damage other gears in the power train.  |  IP: Logged Paul G. Thompson The Weenie Man Posts: 4718 From: Mount Vernon WA USA Registered: Nov 2000 posted 03-02-2004 09:10 PM                     Is there a possibility the bushing or the starwheel shaft was damaged when the sprocket was changed? If it is a "pinned" sprocket, there is a possibility that something may have become warped when the old pins were removed or re-installed. If this is true, when things come up to temperature you might have it lock up. Replace the movement with a spare and see if the machine will sustain a long run. If it can, something went "not according to plan" when the sprocket was changed. I don't know what kind of motor you have, but if it is the Robbins & Myers motor on an RCA soundhead or a Leland motor on the Simplex SH10** sound heads, I never heard of those old motors being equipped with a thermal sensor. I think you have a damaged movement that is bringing your machine to a halt. Just by coincidence, you may have a gearbox chewing brass. When that happens, the pinion shaft will start to climb the gears and bting things to a screaching halt. However, I don't think this is happening in your situation.  |  IP: Logged Dave Ganoe Expert Film Handler Posts: 119 From: Point Marion, PA Registered: Jun 99 posted 03-02-2004 09:32 PM                     The motor is an original that came on the 1040. After changing the sprocket things turned over quite freely by hand. Once the thing stopped you could not turn it by hand, not until you let it rest for about 3-5 minutes then it would again turn freely by hand. I  |  IP: Logged Dave Ganoe Expert Film Handler Posts: 119 From: Point Marion, PA Registered: Jun 99 posted 03-02-2004 09:33 PM                     The motor is an original that came on the 1040. After changing the sprocket things turned over quite freely by hand. Once the thing stopped you could not turn it by hand, not until you let it rest for about 3-5 minutes then it would again turn freely by hand. I have the worst luck. Should have known it would not go well.  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 03-02-2004 09:41 PM                     Sounds like thermal expansion to me. Can you tell whether it's the motor binding up or the projector mechanism getting stiff? When it stalls, try disconnecting the belt or motor coupler to see where the problem lies.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 03-02-2004 09:47 PM                     Probably the cam and star are jamming up when hot does it all ways seize in the same point of the intermitent cycle?  |  IP: Logged Dave Ganoe Expert Film Handler Posts: 119 From: Point Marion, PA Registered: Jun 99 posted 03-02-2004 09:48 PM                     The last time it happened I took the intermittent out and before finishing the task it would turn freely again. I took it completely out and let the motor run for 30 minutes, no problem.  |  IP: Logged Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 03-02-2004 10:19 PM                     I'm on board with Paul and Gordon. I think your intermittent is taking a dump on you. Fail that, there is a gear out of mesh somewhere in the power train. I would check on both problems because it could be a complimentary situation where one problem exacerbates the other. If you fix one thing, the other could go wrong and put you right back to square one. If you take the intermittent out of the machine and try to turn it by hand, does it turn easily without binding? It shouldn't be super easy to turn but you should be able to move it smoothly by hand and there should be no "bumps" or "grinds" in the mechanism. Flush the piss out of it with clean oil to see if any junk comes out of it. You may see a small amount of shavings but any more than a nominal amount spells trouble.  |  IP: Logged Dave Ganoe Expert Film Handler Posts: 119 From: Point Marion, PA Registered: Jun 99 posted 03-02-2004 10:34 PM                     WHen the thing binds up I take the intermittent out and it does turn freely by hand. No grinding or bumps felt in turning it over. I dont understand how changing the sprocket would cause such a problem but apparently it has. I was extremely careful, when I took the intermittent apart to get to the sprocket. No stress on anything, oil was clean, putting the new pins in was a breeze, no pounding on it or anything. Are there bearings in the intermittent that should be changed? The star wheel and cam looked very clean and wear free.  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 03-02-2004 10:39 PM                    Am I missing something. Why would you have to take the whole intermittent apart just to change the sprocket. Wouldn't removing the outboard assembly be the only thing you would need to do to slide the sprocket off the shaft.  |  IP: Logged Dave Ganoe Expert Film Handler Posts: 119 From: Point Marion, PA Registered: Jun 99 posted 03-02-2004 10:43 PM                     You cant take the sprocket off a super without taking the whole thing out of the head, at least I couldnt see a what to do it. Not the most convienent design.  |  IP: Logged Dave Ganoe Expert Film Handler Posts: 119 From: Point Marion, PA Registered: Jun 99 posted 03-02-2004 10:49 PM                     You cant take the sprocket off a super without taking the whole thing out of the head, at least I couldnt see a what to do it. Not the most convienent design.  |  IP: Logged Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 03-02-2004 10:53 PM                    I see what your saying. I just looked at the parts manual for that model. I am used to the later models were all you had to do is take the outboard piece off the intermittent and slide the sprocket off.  |  IP: Logged

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