Ektachrome 100D jamming in Nizo 4056

[johnhermes]

Hello. I picked up a Nizo 4056 which I got from Germany on eBay. The take-up spindle seems to have decent torque and the pulldown claw seems strong. However, when I tried the camera this weekend, it would run a couple seconds then jam. I took out the cartridge, gave it a couple taps, reinserted it and the same thing happened. A second cartridge did the same thing.
When testing the cartridge film flow, I turned the film cartridge spindle with my fingers. It seemed very stiff and it was quite hard to pull the film through the opening. Is this normal or should it be rather easy to turn the spindle and pull the film through?
The camera seems like it should work but it doesn't. I wonder if the film was from a bad batch of cartridges.

[71er]

When you turn the cartridge spindle you should hardly be able to pull the film through. This is because you don't want a pull by the spindle acting at the place where the claw works. I had cartridges once that were obviously too well lubricated and you could pull the film though easily by the spindle; the result was a lot of jitter and partly desaster.
Look at it another way: Standard 8 cameras have a pin usually covered with rubber between claw and take up spool. This rubber makes it impossible to have any pull action of the take up reel by the gate.

[granfer]

The test for "stiction" in cartidges that I always used was to pull out a "loop" from the aperture in the cartridge. It should pull out freely. Then turn the take up spindle on the cartridge to take up the loop. It shoud turn easily.
This simulates the camera action; the claw pulls the film out... the take up draws it back in. Both should be free.. but trying to pull it all the way through with the take up is more than twice as hard because of the bend in the film path below the gate.

[johnhermes]

I am wondering again about the cartridge. When I pull out a loop of film from the cartridge opening and turn the spindle to take it up, it is very stiff and the tension required seems to vary. I guess I need to get some more film and try again. Too bad the stuff costs so much these days.