I've never dealt with motors before but I'm currently planning a project that will involve the use of motors, the project im planning will be a sort of automatic bartender, it will consist of a circle of 12 bottles (mixers and liquor) arranged in a circle and a motor on each bottle will rotate it allowing it to pour with one of those measuring tips to pour the appropriate amount and then bring it back up. but the motor will be approximately in the halfway up the height of the bottle to minimize the amount of strain on the motor, what voltage and type of motor should i use?
To tip the bottles over, the most practical method is probably a large servo.
Now that is an ambitious project. Have you fallen out with your bar staff ?
You might want to consider a single tipping motor otherwise your circular bar-tender is going to be some size top fit in all 12 tipping motors.
Also consider the return-to-vertical rotation speed will probably need to be faster than the tip-to-pour speed to prevent extra fluid escaping during the motion.
A stepper motor is probably your best bet as you can get more predictable positioning and velocity control.
So, an automated hand to select and pick the relevant bottle, move bottle to dispensing position, a slow rotation above the glass, delay for the pour, then a quick rotation back to the vertical followed by return of the bottle to store and removal of the "hand". Oh, and of course a means of ensuring that there is actually a glass to receive fluid.
You might want to do a bit of lateral thinking and develop a means of dispensing the correct selection and amount of fluid without actually tipping bottles. (pressurised air lift system perhaps ?)
All in all quite a complex piece of automation.
austinphilp:
I've never dealt with motors before but I'm currently planning a project that will involve the use of motors, the project im planning will be a sort of automatic bartender, it will consist of a circle of 12 bottles (mixers and liquor) arranged in a circle and a motor on each bottle will rotate it allowing it to pour with one of those measuring tips to pour the appropriate amount and then bring it back up. but the motor will be approximately in the halfway up the height of the bottle to minimize the amount of strain on the motor, what voltage and type of motor should i use?
The first questions you need to address are torque and speed requirements - don't
worry about anything else till you have established these - then you start to think
about motors and gears. In particular what kind of motor - servo, stepper, DC
(this means you have to understand the differences between them really).
Failing that get some good sketches together of the proposed mechanical
arrangement and annotate with sizes, weights, etc. to flesh out this thread.
Using 12 motors for 12 bottles sounds rather wasteful - is there a way to redesign to
use one motor?