Film-Tech Forum ARCHIVE: 35mm viewer/editor problem

This is topic 35mm viewer/editor problem in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Derek Maxwell (Member # 234) on 03-10-2003, 05:44 PM:

I have an old RTI/Lipsner Smith Viewer editor with sound and am having trouble with it. I have contacted RTI and got some help last year to fix a few things but am still not able to get an answer about the reel motors. Since this seems to have been made in England in the 70's, there isn't any hope in getting more info from RTI than I have. I got a manual from them but there is no chasis wiring diagram or relay block wiring diagram and I think this is where my problem lies. The biggest problem....the feed motor pulls the same as the take-up no matter if you are in forward or reverse mode and when you get halfway though the reel, it stopps because of the 2 motors pulling equal. Does anyone have any idea what to do other than disconnect one motor to run in one direction which I have done?

Posted by Stan Gunn (Member # 554) on 03-11-2003, 12:39 AM:

There should be a method of adjusting the tension of both forward and reverse moters, sometimes with resisters or electronic method, usually connected with the forward/reverse control.

hope this helps.
Stan [Smile]

Posted by Derek Maxwell (Member # 234) on 03-13-2003, 03:31 AM:

You would think so but there seems to be nothing I can find. The take-up does have a pot on the tention arm for tention but does nothing on the supply motor. It just stays full force all the time.

Posted by Josh Jones (Member # 447) on 03-13-2003, 08:26 AM:

There may be a possibility that one of the relays for the supply plate are sticking. Relays do stick on occasion. I would check that, then explore the guts of the beast and see what else you can find.

Josh

Posted by Gordon McLeod (Member # 33) on 03-13-2003, 09:04 AM:

There should be a driver amplifier that the output of the pot controls. This provides the power to the servo motors.
Probably one of the drivers have gone south.This used to happen to alot of the older MTM dubbers