dave-in-nj:
Local green house has a 150 foot long trolly and is 30 feet wide all inside of the green house.
you program in the gallons and it calculates the speed.
starts at one end and runs at the speed so that it will deposit the correct amount of water over the whole width and length.with such a rig, and trying to water only 1 plant at a time, it would never finish before some other plant needed water.
Also, no steppers are required. as you get larger, it makes more sense to use encoders on the rollers/shafts, etc than to use large stepper.
once you get out of the toy steppers we use and into ones that use 70 volts and 7 amps, or 120 volts and 10 amps, the motor and driver costs go up, but the power supply gets huge !
it is just indoor green house not that huge and the project will be model for big project for my college.
in the project there will 6 pots of plants each plant has it's own sensor and the water hose will be delivered to the plant that needs water and pump will start spraying water on it.