8mm Forum: Elmo k100 Split Glass Fungus

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Posted by Rui Luis (Member # 3867) on January 27, 2015, 03:45 AM:

Hello, someone can help me with removing fungus on the heat proof glass? Or someone have one of this parts for sell?

Kind Regards!

Posted by John Capazzo (Member # 157) on January 27, 2015, 06:21 AM:

Hi Luis,

You don't really need the glass. Film won't burn without it; but if you're more comfortable with it on, just use white vinegar mixed with water. Glass is a non porous surface, so it cleans off almost immediately.

Posted by Rui Luis (Member # 3867) on January 27, 2015, 06:24 AM:

Thanks a lot John! Some people says without glass can burn the film. This already happens to me with other kind of projector without glass.

Posted by John Capazzo (Member # 157) on January 27, 2015, 09:32 AM:

It can't melt film if it's running at 24 FPS. I've removed the glass on an ST 1200 (the 1st edition machine) and that machine is brighter than the D or HD and still didn't burn any film. If you're comfy leaving it on, clean it with the vinegar and water then finish it with glass cleaner.

Posted by Andrew Woodcock (Member # 3260) on January 27, 2015, 11:22 AM:

I wouldn't chance it on still frame though with the split glass removed. It can burn film in those circumstances.

This is especially probable if the diffuser mechanism isn't 100 percent, as a lot of these machines can be if the clutch mechanism has been maladjusted by people who do not know what they are doing.

Posted by David Ollerearnshaw (Member # 3296) on January 29, 2015, 01:01 PM:

My st had this, but when you go into still frame a device that looks a bit like a tea strener with glass sandwiched between pops up to protect the film. My thoughts are that it was to keep the heat to a curtain ectent off the film gate it directed the air flow away from it.

Posted by Andrew Woodcock (Member # 3260) on January 29, 2015, 03:06 PM:

David, the part you are describing as a "Tea Strainer" is in fact the Diffuser that I refer to above.
It works in pretty much the way you describe where it only allows a small amount of light and therefore heat onto the stationary frame when the projector is placed in still mode.

Trouble is.. as with all things ST, the mechanism is somewhat "Heath Robinson" and therefore if the clutch mechanism has been maladjusted, this can, in turn, cause the diffuser to only partially block the frame or in some cases not at all.
This then, always results in a burned frame of film.

Posted by Brian Fretwell (Member # 4302) on January 29, 2015, 03:58 PM:

Another reason for these (though maybe not planned) is that if the halogen lamp bursts it protects the film and gate from pieces of quartz. I thought that my Agfa Family back projector had suffered from this when it was repaired. Of course with that the glass heat filter is in place all the time as stills are identified on the film with a burnt in marker, a bit like the 9.5 notch, that puts it into single frame projection mode.

Posted by Andrew Woodcock (Member # 3260) on January 29, 2015, 04:23 PM:

Brian,the diffuser would do nothing to protect the film if the lamp explodes in normal run mode as it is lifted well out of the way of the gate and film frame.

Maybe in still frame it would help, but how often do any of us use this facility? So what's the odds of the lamp exploding just as you do?

I must be lucky anyhow as I have never had a halogen lamp explode and cause any damage. Usually for me, the light just goes off and on inspection, the capsule is black or cloudy or both.

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