Crushed camera disassembled

[atferrari]

Wish I knew more about this subject.

Having read lately a lot about VCM (voice coil motors) I recalled a camera crushed by a car, given to me two weeks ago.

Expecting to find one VCM inside, I disassembled the optical block. In the attached .pdf I show the pictures of what I could find and eventually recognize.

As usual with my posts, hardly you could learn something, and, if after reading it, you feel that you have wasted your time, sorry. I already spent mine along two afternoons. Let's share...   

[paulie]

Questions: is this a stepper? Is it related to focus?

Correct-a-mundo, on both counts. They are available on Ebay for pennies a piece and are not surplus:

http://www.ebay.com/itm/10pcs-New-6mm-2-Phase-4-Wire-Camera-Step-Stepping-Stepper-Motor-with-Slider-Bar-/331227803818?pt=LH_DefaultDomain_0&hash=item4d1eb730aa

They were were mentioned in a recent post of mine here for their ability to be driven directly from AVR pins. Ive purchased dozens as part of my ongoing "$15 photo-plotter/PCB-exposer" project.

BTW I also enjoy dissecting cameras as a hobby. Whenever they pop up on a flea market table for $2-$3 it's hard to resist. Endless supply of micro optics, motors, and other weird components.

[void_error]

The second motor is a bipolar stepper, like the ones found in floppy drives or some optical drives, except smaller.