15mm Rail Mount For NEMA 17 Follow Focus Stepper Motor
by anewsome, published
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I wasn't happy with the cost and limits of existing follow focus systems that are available, so I designed my own follow focus system as part of a larger motion control rig for my various camera systems.
My follow focus system uses NEMA 17 stepper motors so I needed a reliable way to mount the stepper motors. I also need to be able to move the system from camera to camera quickly, as well as perform lens changes quickly too.
Since I've printed a pair of these to use on my rig, they've performed flawlessly. I use one for the zoom gear and one for focus.
I'm pretty happy with them so I hope you get some use out of them too.
I used 10% infill and it seems plenty strong to me. With the default settings in ReplicatorG, the critical part for the captive hex nut is printed almost 100% solid anyway. If you're worried about strength, just go ahead and print at 100% infill.
You'll need a 3/4 inch long 1/4"-20 screw and a hex nut to go along with it.
Mount your stepper motor with 4 M-3 screws and you're all set. The 15mm rail clamp works nicely for me, hope it does for you too.
If you're looking for gears to mount on your stepper motors, I get all of mine from servocity.
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15mm Rail Mount For NEMA 17 Follow Focus Stepper Motor by anewsome is licensed under the Creative Commons - Attribution - Share Alike license.
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