I'm back,
My DSLR has interchangeable lenses - some small some very large.
I found these motors: NEMA 17 (4 kg/cm, 3,4V, 1,7 A/Phase), now I just need control boards for them, but I can't find ones that suits them (very strange input voltage). And why good quality/high torque motors seems to be lower than 12V?
Correct me if I'm wrong:
3,4V * 1,7A = 5,78W
But how to understand specs of controler like THIS:
2.5-10.8V, up to approximately 1.5 A/phase continuously without a heat sink or forced air flow (up to 2 A peak). How to figure out if it has enough juice for motors above (I can put heatsink on it)? How amperage and wattage changes when voltage increases? I don't need complicated explanation, make it simple or I will not understand 
Again, correct me if I'm wrong:
Torque: 4Kg/cm, distance: 15cm MAX = force: 2.61511 Newton/266.667 gram-force. I will add gears 3:1 and 10:1, so 30 * 266.667 = 8Kg-force.
Well, if this is correct calculations - this is ideal situation calculations, I think I can substract 1/3 from it due to "stars aligmen factors"
Lets say I will be getting over 5Kg pulling force in 15cm, I consider it plenty because my original goal was 3Kg.
Rotation speed of camera I'm aiming for is 10RPM so with 30:1 gears motor should spin 300RPM.
This leads to another topic:
Why don't use Servo instead as suggested earlier?
There is alignment issue of the device that I didn't mention and needs to be dealt with (not going in depth). Rev.02 changes in gearing partially removed this issue and enabled option to use Servos, so I'm doing some researching on them, but the main quastion is do they preserve their 0 position when powered off (I'm talking about unlimited rotation/360 servos)?
Ok, let's do some shopping, let me know if something is wrong:
- UNO R3 ATmega328P ATMEGA16U2
- ADXL335 3-axis Analog Output Accelerometer
-
5V Active Buzzer
Do I need resistors with THESE? Should I buy a resistor kit or something?
Rev.02