Re: Auxliiary capping shutter for pinhole camera

[Andrew Davidhazy <andpph@xxxxxxx>]

James,

The motors turn cw or ccw depending on the polarity of the input. They are not "proportional" and go full tilt when energized. 

So either the forward/reverse control can be used or the left/right turn motor can be used. They essentially do the same thing. When on the vehicle the steering control has a spring included such that when power is removed it brings the wheels back to a central position. 

The motors tun quite freely when unpowered. That is what made me thing of using a "drag" system to stop the mask from falling back to its perpendicular position once the motor was unpowered for the duration of the exposure. This save battery energy. If I had not done this then the mask would fall back on its own if motor was left unpowered.

Not sure I answered all your questions ... let me know!

Andy

On Jun 4, 2013, at 1:05 PM, James Schenken wrote:

Andy,

Loved your article on how you did it.

Just a couple of questions.

For the drive motor, when you actuate it assuming a clockwise direction, what happens when the control lever is returned to neutral?  Does the motor just stop or does it move counter lockwise?

How much resistance to turning does the motor give when not actuated?

The steering motor can move in both directions?

Did you consider using both motors, one to move the shutter one direction and the other to move it back?  A drive belt would connect the motors so while one is driven, the other is forced in the opposite direction.  This only can work if motors don't automatically "return to zero".

Cheers,

James

Luke 23:24

On Jun 4, 2013, at 11:33 AM, Andrew Davidhazy <andpph@xxxxxxx> wrote:

Maybe you remember that question about a remote controlled auxiliary shutter for a pinhole camera? Well, I wrote up a little "how to" article relating the obstacles, errors and successes along the way. Critical criteria were that it had to be inexpensive and had to have no physical connection to the camera. This was "customer" imposed. The customer is a good friend of mine so could not "argue" much about alternative solutions. Read about it here: 

http://www.davidhazy.org/andpph/text-pinhole-remote%20control-shutter.html

Suggestions and comments for improvement most appreciated.

Andy from Rochester