Home made remote follow focus

this will be my next diy. seems a whole lot cheaper and easier than to build an actual ff.

hoarp, what servo is the best? i know you're trying to market these and probably don't want to give out too much info, so if you have suggestions, that'd be great.

-rh
 
My servos and controllers are modified. The standard servo controller only moves a servo 90 degrees, but a servo is capable of moving 180 degrees. My system increases the astable pulse so the servo can move through its full 180 degree movement.

With servos, just dont buy cheap crappy ones, spent some money.
 
Well i built the control board myself, I just build it to use the whole servos motion. A normal servo controller only uses 90 degrees because thats all a radio transmitter system on an RC car (or similar) uses.
 
I've been looking at that servo strecher, but for the most part if I do remote FF it will be for my moco rig so I'll have the computer control the focus and maybe the zoom, this will be for just the camera, not an m2, so I'm wondering if there is a good way to get my computer to control the camerra built in focus and zoom motors?

Jason
 
You cant get 360 degrees with a standard servo, it wont phsycialy move that far, it has notches on the gearing that restrict it to 180 degress
 
oh I disagree, I have standard servos running my pan tilt, and the just keep turning and turning, non stop when controlling them from the computer, at some point at about 9 or 10 revolutions they start to slow down a bit.

it isn't the gearing that limits there motion its the chipset.
 
jason, what servo allows that? and is there a diff stretcher you use? plus, would you have to get another servo controller to allow 360 rotation?
 
I do not have a servo stretcher, I use the parallax usb servo controller,

but even when I'm using the joystick that came with the servos I get almost 360 degrees on each of the pan tilt servos,

not all servos have gears, they are simply dc motos with pretty basic stamp controllers which allow for error inputs when they will strive to fix.

Jason
 
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