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  • Author Author: adnathanail
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Final Post... Failure

adnathanail

*Edit* Here's a picture of the final code and attatched is the file.

image

 

So to reiterate what I said in the video. I think it's either the human error in my measuring of the robots movement in order to calibrate it, the cable nudging the robot out of the way, or most likely the issue from a couple of blogs ago which I am not 100% sure I fixed. Either way it doesn't work.

Finally I would like to repeat my thanks to Element14 and Mathworks and a big thank you to Adafruit too who I forgot to thank in the video.

I have greatly enjoyed the process and I feel I have learned a lot.

Signing off for the last time

Alexander Nathanail

Attachments:
grid_test.m.zip

  • I wouldn't call it an entire failure. Your goal was very ambitious but you met most of the objectives with the equipment you had, it is (as you've noticed) extremely difficult to implement such behavior, i.e. translating your cartesian output into robot traversal through speed and time instructions for the two wheels and coping with friction, acceleration, servo errors at different speeds and so on. It is very hard with those types of servo motors, but also the algorithm is difficult to implement too. In the past, there were commercial plotting robots that could do this, but they used stepper motors and so had a far, far easier job than the servo method.

    I think the fact that you interworked the platform with Matlab and got output is pretty impressive anyway. None of this was trivial.

  • Nice post.

     

    It often more of a learning experience when you fail to fully succeed verses getting everything to work first time out.

     

    So for me and others, your attempt provides us with a lot of information we can use on our own future products.

     

    DAB