What type of electric motor and control can be used for keeping a load at specific heights?
What type of electric motor and control can be used for keeping a load at specific heights?
(OP)
Hello,
We are planning to adjust the level of a load (around 50 kg) by using an electrical motor. Now we are using a hand crank and we want to get rid of this manual process.
For example we want to implement a control where one can adjust the height of the load. The load is hanging down on a pulley. We want to keep the load at 4 different fixed heights by using an easy push button system or a computer. When one sends signal to the motor the motor will adjust the load to a particular height depending on the signal and then will stop there.
What type of motor and electronic control can be used?
Thanks,
We are planning to adjust the level of a load (around 50 kg) by using an electrical motor. Now we are using a hand crank and we want to get rid of this manual process.
For example we want to implement a control where one can adjust the height of the load. The load is hanging down on a pulley. We want to keep the load at 4 different fixed heights by using an easy push button system or a computer. When one sends signal to the motor the motor will adjust the load to a particular height depending on the signal and then will stop there.
What type of motor and electronic control can be used?
Thanks,





RE: What type of electric motor and control can be used for keeping a load at specific heights?
How fast do you need the load to move? If speed isn't important, I would use a low voltage DC motor and a worm gear. Then you don't need a brake.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: What type of electric motor and control can be used for keeping a load at specific heights?
You can get them from most industrial supply houses. Something simple like this.
Automating it to stop at specific heights without human intervention vs just having someone hit the Up-Down button until it stops where you want it will likely cost you a lot more than it's worth to be honest. Most of us who do control systems in our sleep would not have trouble with it, but if you were unaware of what a hoist was, this is not likely a task you can take on without help, which means hiring someone qualified and then you have to evaluate how much that precision is worth to you.
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
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RE: What type of electric motor and control can be used for keeping a load at specific heights?
RE: What type of electric motor and control can be used for keeping a load at specific heights?
RE: What type of electric motor and control can be used for keeping a load at specific heights?
The simplest way to go is using a constant 24 V DC source and two relays. One for up and one for down. The Arduino has lots of "shields" for relays and such, so it will be very easy to get the hardware up and running.
For the four stops, you can either use limit switches (that you can slide to the needed position) or a position sensor of some sort. The simplest would probably be a potentiometer coupled to the drum. May work with a multi-turn so you can avoid gear for the potentiometer. Or use a string sensor with a pot. Or anything that you can think of.
Gunnar Englund
www.gke.org
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
RE: What type of electric motor and control can be used for keeping a load at specific heights?
Keith Cress
kcress - http://www.flaminsystems.com
RE: What type of electric motor and control can be used for keeping a load at specific heights?
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: What type of electric motor and control can be used for keeping a load at specific heights?
positioning accuracy tolerance
time to move
distance moved
moves per unit time
available electrical power
safety regime
environment
your budget
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: What type of electric motor and control can be used for keeping a load at specific heights?