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Topic: tracking issue 8 mm
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Melvin England
Jedi Master Film Handler
Posts: 707
From: Hull, East Yorkshire, UK
Registered: Feb 2016
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posted August 27, 2017 12:01 PM
Steve - I think Edward's problem may be a little more serious than a badly framed print not being able to be projected properly within the parameters of a projector's framing button. It is a topic that I have meant to bring up before now, so here is the opportunity...
I,too, have suffered this problem. I have several Sankyo Sound 700 projectors. What I have noticed that tends to happen is that as time goes on, a print that projected okay needs to be re framed and the framing knob is moved in a particular direction to compensate. Eventually, to frame correctly, the knob reaches the end of its range, it can't be turned any further and yet the print STILL can't be framed properly, even if the knob is then turned in the opposite direction as it still does not have enough thread at the other end of its range. It is as if the whole projection gate has somehow slipped, but I know it hasn't.
I hope the above makes some sort of sense. Edward, is this something like you have been experiencing?
Can Steve or any other member add anything further to my comments? Has this happened to anyone else? Is anyone able to offer any solutions / advice regarding the problem,please?
.
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"My name is for my friends!"
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Andrew Woodcock
Film God
Posts: 7477
From: Manchester Uk
Registered: Aug 2012
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posted August 27, 2017 03:46 PM
There are some prints out there whose frames are printed out of correct alignment in relationship to their sprocket holes and for these, only the most flexible framing mechanisms with large amounts of adjustment will make it possible to frame them adequately.
On this machine if most of your projected prints appear this way, then the evidence does suggest that there will be wear to your follower (the chewing gum shaped part) or the nylon cam lobe or both.
There is adjustments at the pivot point or fulcrum of the claw to help but there comes a point in time where you are left with no other option than to change these parts if you wish to continue to run the projector.
On the Bauer studio series of machines, these have similar nylon wear parts to the Sankyo although I do believe from our professional service technicians that the Sankyo late Super 8mm machines wear particularly quickly.
The Bauer design allows the follower to be changed out fairly quickly and easily by mounting it to the arm so it clamps into a recess and then secures easily with a screw or two.
I am uncertain whether or not the Sankyo models have a similar design to allow this also to be the case with them.
In these days of 3D replacement part availability, no quality machine should be scrapped just for these reasons alone.
If the part does not already exist, often Edwin of Van Eck Video services will make a run of known wear part just from demand by the masses so even if the parts are not readily available, this becomes yet another option, come the time.
The reasons why the manufacturer's of many of the later machines chose to move to nylon as opposed to metal for these parts, was simply to reduce running noise on the machines.
Designs like the earlier ST 1200 did not use nylon for these parts and they tend to last a lifetime if lubricated and maintained well, however the trade off is that they tend to run far more noisily.
Reducing running noise of our machines became an aspect of a projectors design that was focused upon in far greater detail by the manufacturer's as Super 8mm projectors headed towards the 80's and was also more of an issue as customers were using their machines with microphones as recording facilities became ever increasingly more sophisticated and as people were editing more and more of their home movies soundtracks using their projectors recording facilities.
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"C'mon Baggy..Get with the beat"
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