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small electric motor with clutch...
Hi there!
Sometimes, especially at exhibitions and various displays, it would be very appropriate to operate the automata with electric motors. This would prevent the public from touching the models and causing any trouble, especially if the models are paper automata. But there is a problem: especially with paper automata, things don't always go smoothly... and there can be a risk of a crash of some moving parts. Of course, the electric motor doesn't care about the crash and continues its work inexorably. Is there an electric motor (small, of course) with a clutch that, when properly adjusted, will unlock the transmission axis in case ot any trouble, thus avoiding irreparable damage to the automaton? Thanks! Ciao, PINO
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#2
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I don't know of any motors with clutches, but I wonder if you could connect a motor to the model with a pulley and belt system. You could adjust the tension so that it would move the model, but start slipping when unexpected stoppages occur.
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#3
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we're talking about paper automata... it's a long shot....
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#4
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If I understood a task rightly for this purpose, limit switches can be used.
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#5
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Please, can you explain me better?...
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#6
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Limit switch is a simple device which can switch on or switch off an electric circuit when you need it. For example, to terminate unwanted moving of some detail of your mechanism you install a limit switch. When detail moves to the limitation, the limit switch switches off the electric motor and detail will stop. This method is used to open the doors. When the door is open the limit switch rests on the stopper and switches off the electric motor which moves the door.
To better explanation I propose you to see this link: Limit Switch || Working and Connection of Limit Switch - YouTube
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#7
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I doubt a limit switch would do any good...by the time that which you don't want to move does move, the damage has already been done.
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#8
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To my knowledge there is no low cost torque limiting clutch that is available for such a small amount of torque. What I would suggest is to make a turntable for the model. on the underside of the turntable mount 4 small magnets. below the turntable mount the motor with a disk with 4 additional magnets on the same centers as the turntable. by carefully adjusting the distance between the disks you will be able to control the applied torque and when the turntable starts to slip.
a modified version would be to make the rotating disk that the model sits on out of Aluminum, no magnets are needed. This is called a eddy current clutch and is similar to how a AC induction motor works. note there is an inherit slip in this clutch such that the turntable disk will run at a lower RPM then the motor. Jim Nunn
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#9
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Quote:
And further.... There is an Arduino with a huge number of sensors that you can select and install: magnetic, ultrasonic, infrared and so on. There is remote control by wi-fi module. This is an endless field for creations.
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My personal site. Last edited by Dane; 09-20-2021 at 04:44 AM. |
#10
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Can you show an example of the application?
As a kid I used to make paper props and attach them directly to motor shafts...friction fitting adjusted correctly acts as a type of "clutch". It isn't for all applications, but on simple ones it may work very nicely. |
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