Kristian Schumacher Posted March 24, 2009 Share Posted March 24, 2009 OK, so I got my Arri 2c and it looks really good. It has the high speed gate and motor and a PL-mount. I have run some dud film through and everything seems fine. But the speed control on the motor seems not to be the best. Some speed adjustment can be done, but not very much. When I change the input voltage, I can get different speeds...i.e. input 15v: variable speed 10-18 fps input 22v: variable 15-30 fps input 29v: variable 30-50 fps. I also have a speed controller by Cinetech with crystal sync for a few speeds as well as variable speed and digital readout. The controller has a couple of different connectors (see photos) What I would like to know is if there is anyway of connecting this controller to the wild high speed motor and get reliable speed control. Any input greatly apreciated :rolleyes: Thanks, Kristian Link to comment Share on other sites More sharing options...
Premium Member John Sprung Posted March 24, 2009 Premium Member Share Posted March 24, 2009 What I would like to know is if there is anyway of connecting this controller to the wild high speed motor Bottom line, no. The controller is for Cinetech's motor, not just any motor. The Arri motor you have was designed about 30 years before anybody thought of using crystal oscillators to control camera speed. -- J.S. Link to comment Share on other sites More sharing options...
Kristian Schumacher Posted March 24, 2009 Author Share Posted March 24, 2009 Thanks a bunch, John Maybe you could give me some ideas for motor options that will give me sync upto 80 fps with this camera. I have seen some flat base motors, and will now keep my eyes open for a good deal on one of those <_< Kristian Bottom line, no. The controller is for Cinetech's motor, not just any motor. The Arri motor you have was designed about 30 years before anybody thought of using crystal oscillators to control camera speed. -- J.S. Link to comment Share on other sites More sharing options...
Premium Member Tim Carroll Posted March 25, 2009 Premium Member Share Posted March 25, 2009 Kristian, If you are looking for a crystal sync motor that can run your IIC up to 80 fps, then I would recommend the Cinematography Electronics motor. They don't make them anymore, but you can find them on eBay and other places. It's a great motor, just make sure the rubber coupling is good. If it's not, CE will still service the motor and they can replace the coupling. Best, -Tim Link to comment Share on other sites More sharing options...
Premium Member Oliver Christoph Kochs Posted March 30, 2009 Premium Member Share Posted March 30, 2009 Tobin Cinema Systems had also built variable motors with a 24/25 fps crystal speed. The upper frame rates on every motor i've seen always require 24 V- and so does the Tobin. It is now discontinued as nobody builts anymore aftermarket products for the older Arris due to the "digital revolution". Besides the CE motor this was a good unit, too. Link to comment Share on other sites More sharing options...
Premium Member Hal Smith Posted March 31, 2009 Premium Member Share Posted March 31, 2009 The Tobin TXM-21Ab is by far the best of them. It's the one with the large motor standing up alongside the camera. Apparently the earlier ones didn't have enough torque to reliably drive a camera that was a bit stiff. Link to comment Share on other sites More sharing options...
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