My first post, and I'm excited to get my Arduino project working
I've purchased quite a few things, but keep running into issues where the stepper motors dont move fast enough, or i need to get a separate power supply, and before I go on another buying spree, I wanted to see if what I wanted to do what possible, or an approach that would be more suited for what I want to do.
However, I need a stepper motor that spins faster then the 28byj-48 motor, as its a tad to slow.
If i can make something similar to whats in that video, with the addition of 1 more stepper motor on top that would be perfect. I pan to put a little LEGO guy on top of the motor and have him spin around.
I would ultimately like to have 2 of those setups facing each other, but Im not sure if having dual setups facing each other is possible, or if i just have 2 of the setups and make them face each other.
That is very confusing. I can't figure out what you have actually tried.
You don't normally use A4988 drivers with 28BYJ-48 stepper motors. Does that mean that you are using the A4988s with the "screw-drive" stepper motors? If so, what is the problem?
Post your program and tell us in as much detail as possible what actually happens when you run it and what you want to happen that is different.
Also make a simple pencil drawing showing all your connections and post a photo of the drawing. See this Simple Image Guide
Here is a picture of what I want to do.
Main thing is the motor on top needs to spin a Lego figure, so a stepper motor that is decently fast unlike the 28byj, and be able to be control the speed through code.
You will often see steppers sold in NEMA sizes. 17 and 23 are most popular. They would seem to be too big for your project. If you could find NEMA 5 that might be good. (I don't know what size is smaller than 17.)
Also look for a "pancake" stepper. That will be flatter than a regular one, which might be appropriate for your project.
At the worst, can you get another of those screw ones and remove the screw?
joeafox:
I was just explaining what items I had so far.
I really wanted something like in the video, but looking for a quicker motor then the 28byj.
I'm still confused.
You said in your Original Post that you have motors with screw drives. They sound like just the thing for your project so why are you focused on the 28BYJ motors?
Morgan, thank you for that. I did see the pancake ones, but felt they were to big, I'll look at the 5s like you mentioned.
I didnt know what controller shield i should get, i see a few on Amazon and it looks like what i want. The cnc expansionboard that have 3 or 4 slots on them.
Not sure how to program with a shield, I've always just plugged right into the mega2560.
You said in your Original Post that you have motors with screw drives. They sound like just the thing for your project so why are you focused on the 28BYJ motors?
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Robin2:
I'm still confused.
You said in your Original Post that you have motors with screw drives. They sound like just the thing for your project so why are you focused on the 28BYJ motors?
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I started off with the 28byj, but found they are just to slow for what I was looking to do. So I wanted to know other motors to use that would allow rotation speed without a potentiometer, and can be done via code.
joeafox:
I started off with the 28byj, but found they are just to slow for what I was looking to do. So I wanted to know other motors to use that would allow rotation speed without a potentiometer, and can be done via code.
Sorry if you think I am being a PITA but do you, or do you not have the motors that you describe in your Original Post as
A few DC 12V Drive Stepper Motor Screw with Linear Nut Slider for DIY Laser Engraving Machine
Robin2:
Sorry if you think I am being a PITA but do you, or do you not have the motors that you describe in your Original Post as
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What is being a PITA?
I was unable to find NEMA 5, ill have to check more on ebay or something.
My main questions is, what shield do i use like the one in the video, or do i even need a shield, and are the motor speeds adjustable from within code?
As you're obviously not willing to be clear about what you're actually trying to do, I'll keep it simple.
For your stepper: motor speed can of course be adjusted in code (after all you have to tell how fast it takes the steps, i.e. when it takes a step and in what direction), until you reach the limit of the motor. The 28BYJ-48 does no more about 30 rpm iirc. It's not a speed monster, but it's got some pretty decent torque in a tiny package.
If that one is running too slow for you, find a faster stepper. That usually means a stepper that is less geared down than the 28BYJ-48. Steppers come in many shapes and sizes, find one that physically fits your project, has the speed you require, and the torque you require.
After selecting your stepper, find a controller and power supply that is suitable for that specific stepper's power requirements.
wvmarle:
As you're obviously not willing to be clear about what you're actually trying to do....
These type of replies need to stop, they are no progressive to the community, and will eventually drive people away.
I am new to the Arduino field, so if I cant clearly express what it is I'm trying to do... I atleast try my best to. That is the exact reason I'm here for help in these forums, not comments about what it is "Im unwilling" to do.
joeafox:
These type of replies need to stop, they are no progressive to the community, and will eventually drive people away.
This is a FREE help forum, populated by volunteers.
Not answering simple questions about a project YOU want FREE help with wastes our time, and that's what we're complaining about. If that means driving away people that don't respect this simple fact, all the better for the others. Had you read the forum sticky you would've known what is needed for getting detailed and specific suggestions.
In the process I still gave you all the things to look for when selecting a stepper; if that's too general for you, well that's only because your question is lacking detail.
joeafox:
These type of replies need to stop, they are no progressive to the community, and will eventually drive people away.
I am new to the Arduino field, so if I cant clearly express what it is I'm trying to do... I atleast try my best to. That is the exact reason I'm here for help in these forums, not comments about what it is "Im unwilling" to do.
If you were willing to answer the question but unable to, then rather than ignoring the question, say what you don't understand about the question, and then we can give you more detail about what is being asked. Just ignoring a question comes across in a text conversation as if you have something to hide or you just don't care.
