Rowan Biddiscombe Posted June 30, 2020 Share Posted June 30, 2020 Mentioned this in another thread but thought it would be best to start a new one for clarity. Got a Bolex EBM on a crazy deal and now I'm trying to figure out a way to power it properly. I bought a 12v AA battery box, soldered a tuchel connector and chucked 8x Eneloop Pro batteries (1.2v min.2500mAh) inside. It turns over but it sounds really fast, like 50fps+. The frame rate selector dial does nothing to change speeds oddly. I guess what I'm asking is: Technically, should this work? Or have I done something wrong? Has anyone heard of the frame rate dial not working? I'm planning on sending it to Bolex Switzerland for a service but they're understandably crazy busy right now (since a month) and not returning calls/emails. Any help would be massively appreciated! Cheers, Rowan Link to comment Share on other sites More sharing options...
Premium Member Simon Wyss Posted June 30, 2020 Premium Member Share Posted June 30, 2020 Bolex International aren’t busy but abandonded. Marc Ueter has left the company. Otello Diotallevi retired in 2018 and continued to work a little until past May. The new owner, Hugo Diaz, isn’t responding to E-Mails because he is alone. He has no idea of what he bought with the share package on August 28th, 2019. The website is nil. Now he’s taking summer holidays, it is said that he will answer question in September. Your camera should of course react to changing speed settings. Aapo Lettinen, member here, can help you best. I do only mechanical and optical work (and no Super-8). 1 Link to comment Share on other sites More sharing options...
Premium Member Aapo Lettinen Posted June 30, 2020 Premium Member Share Posted June 30, 2020 I am more confident making new speed control systems than trying to repair old ones, not being familiar with that particular motor type. Is there still technicians working on these motor models able to repair the old electronics? if there is any, that would be the first option to try. if you want, I could probably be able to make completely new control electronics to the motor if needed but it would be pretty time consuming and possibly expensive. If you want additional features like additional speeds and a display and so on then it could be useful Link to comment Share on other sites More sharing options...
Premium Member Aapo Lettinen Posted June 30, 2020 Premium Member Share Posted June 30, 2020 if there is the circuit schematics of the control system available we can try to guess what could be wrong with the camera. I have understood that the system is "electrically stabilized" speed control. I am assuming it's reference voltage based. In that case it could maybe just be a mechanical fault in the speed selector or its connections. Just guessing, impossible to know without the circuit schematics. (the way I would do that type of speed selector would be with the selector choosing different reference voltages from resistor bridge which is set up between full voltage and ground. The "stuck" selector would indicate that the resistor bridge does not work correctly so the voltage is stuck to either end of the resistor bridge. For example faulty ground connection on the bridge would do that. This is, again, guessing because I am not sure how they have done the selector, I am basing this guess on how I personally would do that type of design the easiest way) .Opening the camera to show the electronics could reveal some information as well and would give better understanding how the speed stabilizing works on that model. If my guess about the resistor bridge fault is right there could be a mechanical fault which could maybe be even seen and repaired easily. Link to comment Share on other sites More sharing options...
Premium Member Aapo Lettinen Posted June 30, 2020 Premium Member Share Posted June 30, 2020 24 minutes ago, aapo lettinen said: if you want, I could probably be able to make completely new control electronics to the motor if needed but it would be pretty time consuming and possibly expensive. If you want additional features like additional speeds and a display and so on then it could be useful real Crystal Sync of course with all speed presets being Crystal and very accurate Link to comment Share on other sites More sharing options...
alexandre favre Posted July 8, 2020 Share Posted July 8, 2020 (edited) - Edited July 8, 2020 by alexandre favre Link to comment Share on other sites More sharing options...
Arthur Gartmann - Bolex International Posted July 10, 2020 Share Posted July 10, 2020 On 6/30/2020 at 6:43 PM, Simon Wyss said: Bolex International aren’t busy but abandonded. Marc Ueter has left the company. Otello Diotallevi retired in 2018 and continued to work a little until past May. The new owner, Hugo Diaz, isn’t responding to E-Mails because he is alone. He has no idea of what he bought with the share package on August 28th, 2019. The website is nil. Now he’s taking summer holidays, it is said that he will answer question in September. Your camera should of course react to changing speed settings. Aapo Lettinen, member here, can help you best. I do only mechanical and optical work (and no Super-8). Bolex International is running as it was over the last decade with extended focus on customer-service. Today after-sales organization is in place to serve better our customers directly, meaning, not anymore trought not authorized dealer or agent. Special focus on repair is made, by qualified Bolex technician with original Bolex Certified spare part. In order, to protect our employees health against unpredictable Covid-19, we significantly reduce our activities. Bolex International has appointed Hugo Diaz as administrator only, ownership of the company is not public information. Bolex International reserves the right at any time to attack any disinformation campaign against the brand mark. The official list of retailer will be formaly publish in the official website. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now