I want to build a model railway layout with my friend. And we also need level crossings. Should I use a "normal" motor or a stepper motor? What's the difference, and which is better?
Thanks
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I would use a servo where you can specify the angle of rotation. Otherwise, a stepper motor. The advantage of a stepper motor is that you can also determine the angle of rotation based on the steps. A normal motor needs a limit switch because it can rotate at different speeds, which can quickly lead to timing problems.
Regarding the servos: Ginpanse already mentioned something about the appearance. The servos are very small.
https://www.modellbau-berlinski.de/rc-elektronik-und-akkus/servos-und-co/nano-servos/d-power-as-107bb-servo-nano
At approximately 2 x 2 x 0.8 cm, this is already extremely small, but it might still be too big. If there's space under the plate, drill a small hole and use rods to control it from below…
As for the stepper motor, I'd also mount it underneath the plate if possible, perhaps using a small toothed belt to direct the rotation upwards. Then put a cover over the top (perhaps 3D printed). This would allow for a neat concealment and a realistic build of the level crossing on top, with virtually no space constraints… They also have a drive box on the side…
Thanks for the tips, but is there a cheaper way to get the motor? We've already spent a lot of money on other things. Or are you saying we shouldn't skimp on motors? I was thinking of these: ELEGOO 5-Pack Stepper Motor 5V 28BYJ-48 ULN2003 and 5-Pack ULN2003 Driver Boards for Arduino: Amazon.de: Business, Industry & Science
A stepper motor under the plate, a sheet of metal on the axle, and a wire through a small hole up to the barrier. I've seen it done exactly like this on numerous larger model railway layouts. The advantage of stepper motors is the smoother movement compared to servos. The movements of cheap servos, in particular, look very artificial and wobbly when the movement is supposed to be executed slowly (which is probably what's intended for a barrier to make it more realistic).
That was just an example of an extremely small servo. Others are larger, but also cheaper… If you want to use a stepper motor instead of a servo, the ones in your link will work too.
Hobbies cost money if you put in the effort and want to make something really beautiful and functional…
ich nehme an du meinst den Antrieb für die Schranken? Da reicht bei den Dimensionen ein normaler Modellbau-Servo. Ist halt etwas ruckelig von der Optik her. Alternativ ist das beste natürlich ein Schrittmotor, da du den extrem präzise steuern kannst. Die Ansteuerung ist hier jedoch etwas aufwändiger. Nehme an ihr wollt das Ganze mit einem Microcontroller (Arduino, ESPx) steuern.
Ein normaler dc motor würde theoretisch auch funktionieren, jedoch brauchst du dann Endschalter, oder einen Encoder um die Position zu bestimmen (Servo-Prinzip), macht also weniger Sinn.
Now that's what I call two stupid people, one thought 🤪😁 Almost the same thing at almost the same time… You were just a bit faster 😂