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graffix
08-30-2011, 04:13 PM
Im frustrated with my projects and forum due to lack of help,comments,and lack of progress.
What should I do different?

Mike G
08-30-2011, 04:18 PM
What is your project?
What problem are you having?

graffix
08-30-2011, 04:31 PM
Thanks for your attention Mike,One project is Im trying to build a balance bot.I think it should use a couple of parts working together.Im trying to do it in sections and not having much luck.Here is a link to the thread http://forums.parallax.com/showthread.php?133348-Parallax-Balance-Bot

I think it should be just creating a PID loop using these sensors
memsic 2125
lisy300 gyro
wheel encoder
HB25 motor controllers

BS2 MCU

Mike G
08-30-2011, 04:38 PM
I've never built a balance bot but a quick a Google search "stamp balance bot" turned up several resources with Stamp source code.
http://www.parallax.com/tabid/505/Default.aspx
http://find.botmag.com/051109
http://find.botmag.com/balancing-bot-code-eric-ostendorff-279.html

graffix
08-30-2011, 04:59 PM
I could try creating "tilt zones" i guess using just the memsic but thats not a PID loop.

Chris Savage
08-30-2011, 05:44 PM
graffix it seemed like you were getting help in your balance bot thread. Was there something more we could do to help?

graffix
08-30-2011, 06:15 PM
Is it even possible with this MCU or ?Short of grabbing parts or making a trip to my house, just kidding I'm not sure.I didn't think it was going to be this difficult.

Chris Savage
08-30-2011, 06:24 PM
Others have created balancing bots using the BASIC Stamp Microcontrollers, so I know it is possible. The specifics I am sure are a bit different among different creations.

graffix
08-30-2011, 06:32 PM
Thank you Chris,coming from you I at least find that motivational.

erco
08-30-2011, 06:34 PM
graffix: Sorry to hear you're frustrated. Your balancebot project is quite complex. You ask simple questions that have very complicated answers which require more thought and tech detail than most Forumistas have time to reply.

I have only made one balancebot using an IR sensor, which was challenging enough. That was in 3 parts in ROBOT magazine, if you want to check it out, I got into PID there and had decent results with the simplest possible configuration. That would be a good first project for you. Here's what I ended up with:

http://www.youtube.com/watch?v=R-txjHd4Kvs and http://www.youtube.com/user/ercost60#p/u/9/j-Ubi93VzHo

Sounds like you have the gyro & accelerometer, which is a better option. Sounds like you're trying to apply the Parallax PID info, which is oversimplified and barely scratches the surface of the material you need. That's a very general tutorial; you note they don't actually control anything with their program, it is far from a finished program. In your BB thread, I sent you a link to my thread which has links to tons of info on other people's balance bots. You'll need to dig DEEP and get into Kalman filters and sensor fusion to get your bot to work. It won't be easy. If it was, everyone would be doing it!

Hope this helps steer you.

Best,

erco

bill190
08-30-2011, 06:37 PM
In general when asking questions on the internet, if you ask a big general question like "How do I get this entire project to work", then what you are asking is that people spend a lot of time and look over your entire project. Other people will not have all the same hardware you have, so will not be able to answer. And many people are not going to do all that work of learning all about your entire project, then finding the problems...

However if you ask a specific question about one thing, like I have this specific chip and I can't get it to communicate, then you will have a wider audience. Many more people might have that chip and may have gotten it to work. So they can simply copy and paste their working code and not spend too much time answering your question. Or could look at a short section of code you posted and not spend too much time finding a problem.

Anyway I have found that I will get more replies to specific questions. And that asking many specific questions will get many more replies than asking one big general question.

It looks like you are doing the right things. You are reading all about your project. We all get frustrated. Just take a walk around the block, then go back and keep plugging! (I have my best "Ahhh Ha!" moments when I take a break and am going for a walk or laying down and resting...)

So far as what you can and can't do with a programming language and one command... I will stop work on my project, create a new test program, then just experiment with that one command. See what I can and can't do. Or start a new thread on a forum asking about that specific command.

graffix
08-30-2011, 09:09 PM
I'm not frustrated anymore,Thanks guys!Sorry for the late reply, I'm now at work.Also sorry for any misconceptions I had.