Hmmm, kind of!
But........ It shows great potential as a hobbyist alternative, with some tweaking.
After a back and forth with @Andyhull on another thread it got me to thinking perhaps it's not as useless as my initial annoyance led me to think, (I broke a mainspring trying it but to be fair the spring had been previously abused and the tool wasn't ideally sized allowing the coils to jump and tangle).
I had a bit of a resize with sanding stick and scalpel and tried again and it's certainly got promise, I need to tweak the file to suit specific barrels but it's a simple quick 3 part print using barely any filament.
Obviously not anywhere near as good as the proper bergeon winder but definitely cheaper for the hobbyist, (even if you haven't already got a printer and had to buy one first).
Here's a video of it if anyone is interested, comments and ideas are welcome.
I have a Rotary Monza I am fixing up. I disassembled the barrel and removed and cleaned the mainspring. I secured a copy of the parts list and it shows that as well as the mainspring, there is also a Brake Spring (part 775 on the picture). What is it, and do I really need it? Certainly Cousins does not sell it. I googled AS 1902 brake spring and ONE result came up of a Russian watch forum discussing this item. Apparently it is thicker than a normal spring and it seems to have some sort of bent over feature on it. Can I just make one using the old mainspring? If so, how long should it be? Is it really necessary?
ROTARY Monza AS 1902.pdf
You are sayin that the wheel isnt centered , then i would check that the wheel isnt made for being under tension from the side,that little piece of metal could have been Lost (piinged across the room)by the last intruder And not noticed. With great impact on the function Sent from my iPhone using Tapatalk
Allya need is love... and perhaps a little lubrication... and maybe another 15 or so jewels.
This late '70s wonder joined my current favorite in the 404 club on my wrist this evening. As well as a good clean and some light lubrication it required a little gentle hairspring massage to flatten out a rather obviously bit of conical contortion.
Despite having more fingerprints in it when it arrived than jewels (at least three of the former and only two of the latter), its Hong Kong heart is now ticking along quite nicely.
Friction spring i think, i have bought a selection on eBay, cost next to nothing If and when you get it running I would like to know if im correct or it was something Else Another clue to the problem was your info that it runs nearby 3/4 and the next time Its something Else that indicates that the problem is in that direction If it was worn teeth the revolutionrate would be more the same and the date would stop entirely imo. Regards Allan Sent from my iPhone using Tapatalk
From looking at pictures I can find only one of them seem to have a different design that seem to center the disc better, from the looks of it the others don't have this. But, it would be logical since the disc isn't perfectly centered. Haven't been able to find out what this is called.