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1  Using Arduino / Motors, Mechanics, and Power / Re: Project: Motion Tracking Cat Toy on: April 10, 2013, 03:47:48 pm
Thank you !
Looks like you didn't care about limits rotation shaft ?
How you solve the problem that cable from laser and from second motor (one that with laser) can be going round and torn ?
Did you use some limits in your program code ?
2  Using Arduino / Motors, Mechanics, and Power / Re: Project: Motion Tracking Cat Toy on: March 26, 2013, 11:30:25 am
Thank you ! I'll wait for pics.
3  Using Arduino / Motors, Mechanics, and Power / Re: Steppers 28BYJ-48 for webcam pan-tilt on: March 14, 2013, 12:54:18 am
harriscreekcentral

Thank you. So did you use encoder in your project ? And seems you used nema23 motor - seems easy install encoder because of size of motor..
in my case I have only my little stepper (
Also I will try to use nema11, but I still need to know which encoders should I use.

sbright33
Thank you too. Could you please give some examples of code with your library ? I am really interested with it but still can't understand how to use your functions ( 
4  Using Arduino / Motors, Mechanics, and Power / Re: Steppers 28BYJ-48 for webcam pan-tilt on: March 12, 2013, 09:04:53 am
Is there any other way to know position of stepper ? I really need to do it.
May I need be some rotary encoder, but I dont know which and how to connect it to my stepper
I many time have tried to find solution in google but nothing ..
5  Topics / Robotics / Re: Position of a stepper motor on: March 12, 2013, 08:57:25 am
... but if we still talk about knowing position of stepper - how to do it ?
I think I really need this ability..
6  Using Arduino / Motors, Mechanics, and Power / Re: Project: Motion Tracking Cat Toy on: March 12, 2013, 08:54:27 am
ping
7  Using Arduino / Motors, Mechanics, and Power / Re: Project: Motion Tracking Cat Toy on: March 09, 2013, 03:31:58 pm
Hello.

Could you show more photos of your stepper mounts with each other ?
I try to make similar device but wonder how to mount this steppers to kind of pan-tilt system.
Also very interesting how to solve problem with limits rotation shaft ?

I need to rotate shaft from 0 to 180 or may be more but if it not going round and tear my cables.
What kind of limit do you use ?
8  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: March 09, 2013, 11:44:33 am
sharonf
pls check the first page of this thread.
9  Topics / Robotics / Re: Position of a stepper motor on: March 04, 2013, 08:29:19 am
thank you !

yes I knew about limit switch idea..
but in this variant when device is powering up, motor should move and reach limit and only after then I'll can determine its position, isn't it ?

In variant with encoder I will know position everytime I thought..
10  Topics / Robotics / Re: Position of a stepper motor on: March 01, 2013, 08:45:37 am
lagoethe

Hello !
Have you finished your project ?
whether they are useful for you ?
I wonder because I try to search the way how to know position of the stepper motor shaft..
May be this Position Encoder will be helpfull for me.
But where can I buy it ?
11  Using Arduino / Motors, Mechanics, and Power / Re: Sevos don't work. on: March 01, 2013, 04:11:12 am
I am sorry but
let me ask about your mention
Quote
and a stepper with potentiometers
which exactly steppers and encoders do you use ?
12  Using Arduino / Motors, Mechanics, and Power / Re: Steppers 28BYJ-48 for webcam pan-tilt on: March 01, 2013, 02:51:12 am
MarkT
Thank you !
So you advise put two microswitches on the stepper in two places where shaft will get 0 and 180 degree and somehow get a signal from them to ardiuno sketch ?
But what they should switch ? How to get these signals to arduino ?
Maybe encoders are good idea, but what kind of them should I search ?
13  Using Arduino / Motors, Mechanics, and Power / Steppers 28BYJ-48 for webcam pan-tilt on: February 26, 2013, 11:31:48 am
Hello all.

I am a new in steppers,  so I have many questions..
First of all - I have made mini pan-tilt system for my webcam with two micro servo sg 90.
It working ok but now I want to change servos to steppers because servos are noisy and I want to make as possible silent pan-tilt.

I have bought two 28BYJ-48 5v + ULN2003 and start to testing..
But now I see that these steppers maybe not suitable for my project - they are very slow.
But I will continue to use it before I decide what other stepper I should buy.

And there is my first quiestion - how can I check the max speed of rotation of this stepper, let's say, to 90 degree ?
I need to rotate shaft from 0 to 180 or may be more but if it not going round and tear my cables.
What kind of limit should I use ?
And what code for arduino will help me to run this stepper very quickly ?
I have tried many examples but I dont understand it - just copy-paste and compile.
I want to choose one the best way for my task and learn it.
Please advise.
14  Using Arduino / Motors, Mechanics, and Power / Re: 28BYJ-48 5-Volt Stepper on: February 23, 2013, 01:44:31 pm
Hello Sbright33

I also trying to use your code.
I have copied it from https://gist.github.com/sbright33/4178431 and paste to Arduino IDE
compiled and nothing happens..
I have tried uncomment two lines in loop

void loop(){
calloften(); delay(500);
off();while(1); //halt
}

but in not helps..
I have arduino nano + 28BYJ-48 + uln2003 driver board - all connected in proper way to 4,5,6,7 pin on arduino..

all other examples for stepper motor are working ok..
please advise.
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