8mm Forum: Elmo ST1200HD Inching knob removal

This is topic Elmo ST1200HD Inching knob removal in forum 8mm Forum at 8mm Forum.

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Posted by Phil Slater (Member # 2388) on January 26, 2015, 05:15 PM:

Does anyone know if the inching knob can be temporarily removed on an ST1200HD so that a scope lens bracket can be fitted? I have tried to unscrew it but it doesn't move, and I don't want to break it.
Thanks

Posted by Andrew Woodcock (Member # 3260) on January 26, 2015, 06:20 PM:

What is an inching knob?????

Posted by Barry Fritz (Member # 1865) on January 26, 2015, 06:32 PM:

It is a knob that you turn to slowly advance the film. Typically used after you thread the film to make sure the claws engage the sprocket holes and the film travels smoothly through its path.

Posted by Andrew Woodcock (Member # 3260) on January 26, 2015, 06:37 PM:

Do you mean the framing knob Barry?

Still don't get why ANY knob needs to removed to fit a scope lens bracket though?????

Posted by John Capazzo (Member # 157) on January 26, 2015, 08:55 PM:

You can remove it when you open the back cover. It's not a vital part of the projection or mechanics. If you're not going to use it in the still position for frame by frame use, then it will be useless to you. If you email me, I'll take a pic of what to look for.

John

Posted by Mathew James (Member # 4581) on January 26, 2015, 09:31 PM:

Now Barry has caught my interest with this 'inching knob'......
I know what you mean with the term framing knob....what i am interested in is what he said about it moving the sprockets closer into the film holes... I wonder if this is why sometimes i get 'chatter' and then other times the film runs smooth as silk..maybe all i need ed to do on my 1200HD was to adjust this knob??
Interesting question Phil regardless...
Cheers,
Matt

Posted by Tom Photiou (Member # 130) on January 26, 2015, 11:43 PM:

if necessary it can be removed however, after over 30 years of using the 1200HDs i have never had to turn it in after threading a film to ensure the claw en gauges the sprocket holes, [Wink]

Posted by Phil Slater (Member # 2388) on January 27, 2015, 03:09 AM:

The inching knob is preventing a scope bracket being attached on this model, unlike the GS800 or the ST800 which doesn't have one. Ideally I would like to be able to remove it for scope shows and to put it back at other times. If it just screwed off, I could do this, but it doesn't seem to. I don't want to cut it off permenantly incase I ever sell the projector.

Posted by Bill Parsons (Member # 244) on January 27, 2015, 03:10 AM:

Barry’s point is valid, but the inching knob is also invaluable if you want to start the film at a precise point for rerecording a soundtrack or a reel change over, you can use the inching knob to line up a number on the countdown leader with the aperture in the gate to start the film at the precise point.

Posted by Maurice Leakey (Member # 916) on January 27, 2015, 11:58 AM:

The inching knob is the large knob on the front panel to the right of the lens.
http://super8data.com/database/projectors_list/projectors_elmo/elmo_st1200dmo.htm

Posted by Bill Parsons (Member # 244) on January 27, 2015, 12:55 PM:

Phil, The inching knob is held in place with a small centre screw, to gain access to this you have to remove the silver trim on the front of the knob which is glued on, unfortunately you would still be left with a shaft protruding, may be easier to find a smaller scope bracket.

Posted by Phil Slater (Member # 2388) on January 27, 2015, 01:03 PM:

Thanks for the advice. I don't think I'll attempt to remove it. I'll stick to my GS800 for scope shows.

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