whoam42a1 scanner https://www.youtube.com/channel/UChLtZ3DOPTB1RTzbctSO8jg
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Where did you get your capstan? I was looking at McMaster Carr and found it difficult to find one that fit my exact needds.
I made my roller from a nylon spacer and some silicone rubber sleeving .Silicone rubber seams to grip the film very well, but needs to be cleaned regularly, as it picks up a lot of dirt. However if you google rubber rollers and click on images you will find all kinds of rollers which should take you to suitable sites. Hope you find what you’r looking for.
Thanks @whoam42a1.
Thanks for the tips. If you have any part numbers or specific vendors, that is always helpful for folks looking to recreate what you’ve done.
Do you know what durometer the rubber is (the softness rating)?
I’m wondering what the material properties of a PTR are that keep it from damaging the film and whether or not the rubber sleeves you are using have those same properties. Hmm…
Sorry,I don’t know. The sleeving I used is, soft, a wall thickness of 1mm, with an almost shiny smooth nonslip surface. I can’t tell you where it came from. We use to use it years ago, for sleeving wire harness’s. A three pronged hand tool would stretch it over the wires. Not very helpfull to to you.
These People ( http://www.flashscan8.us/category/accessories/ ) Sell PTA rollers. Scroll-down to the bottom of the page for info on rollers.
Perhaps products like this might be adapted ,
( https://www.amazon.co.uk/Display-Cleaner-Cleaning-Repeatedly-Iphone5/dp/B009JZEAGM ),
the diameter might be to small for 35mm film.
It’s hard work trying to find the right parts, or things that can be modified.
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Through work I have access to a Kinetta, Scanity, and there is an older Arriscan and a Filmfrabriek nearby; if you have questions about those, I can try to answer them.
Wonderful news! One question I have is what they are using to detect a frame. The Kinetta looks like it has several light sensors in a column. Can you verify? Any idea what kind of sensors those are?
Also, any pics of the gates on each machine would be greatly appreciated. That’s my next design challenge.
Thanks for offering, Martin!
Hi Martin, I have a question about the FilmFabriek unit. I have seen the results of their post-processing software and it looks very nice. Have you spent any time with it? I wish something like that was available as a retail product. Do you have any observations or comments? thx!
The Kinetta uses a laser that is shone on the film, and the reflection is measured. For each film type, one has to do a calibration. The height of the laser is adjustable, therefore one can use pretty much any format from 8mm to 35mm, incl 22 and 9.5 mm.
The problem with this approach is that when having film with mixed stock, it can lose track of what is a sprocket and what isn´t. You end up having to do a lot of clicking trying to keep the image in frame during scanning.
Other than that I am not sure as to which sensors you refer to - the Kinetta has a LED with R, G, B and White.
The gate on the Scanity has a patent, it is completely round and uses a line scanner; thus the film stays very flat on the surface.
Vintagefilm - I have not used the FilmFabriek scanner myself, so cannot comment on the software. sorry.
Thanks, @Martin_Weiss. Kinetta is using the same approach I was planning on using, it seems. It’s good to know that it’s not always reliable with mixed stock. Perhaps I can come up with something that works for that.
Did not know the Scanity had a patent, either!
M
Looks like DFT (makers of Scanity) hold a couple of patents:
https://www.google.com/search?tbm=pts&hl=en&q="Digital+film+technology"
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I believe the newest Kinetta software no longer uses the perforation sensor, so there are o problems with mixed film stocks.
Nope! 
The Kinetta uses both a precision encoder (80K counts per rev) and pattern matching software. Perfs are nice but not necessary.
Thanks, @BobKanter21! Can you elaborate on what “pattern matching software” means?
I have a an encoder on the machine now with 200 counts per rev. It was only meant to be temporary but I could see it being of use if I knew how it was being used on the Kinetta. I just assumed that sense film shrinkage means you can’t rely on frames being standard from reel to reel that I would have to rely on perfs. But repaired perfs can be unreliable…so I’m still unhappy with that solution but without a viable alternative at the moment.
Any light you can shed would be great!
M
An interesting study of several high-end scanners. Well done.
Bob is indeed right. I’m currently testing the beta software, and the stabilisation works without the laser and generally much better.
Matthew - in the new software you mark an area that you define as the “active” pattern search area. Kinetta then compares this pattern to the current pattern, and guesstimates the proper framing. In my limited experience so far this works very well, incl. missing/torn sprockets.
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This link will probably disappear in the future, when revisions are made (I’m part of Barbara Flückiger’s research team). A more lasting link is:
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I think the word you are looking for is “calculates.”
Thanks Martin. Very informative links.
Thanks for that explanation. Sounds like an additional camera. I wonder how this impacts the processing power needed to run the machine and the overall cost.