Challenge defining these DH parameters

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The discussion centers around the challenges of defining Denavit-Hartenberg parameters for a robot arm design, specifically at links 2 and 5. The original poster, Thomas, is seeking clarification on the parameters a, d, alpha, and theta, suspecting potential errors in his coordinate system. A response suggests that the provided illustration lacks sufficient detail to diagnose the issue effectively. Additionally, a reference to a Wikipedia article and a related video is mentioned as a possible resource for further understanding. Overall, the conversation highlights the complexities of applying the Denavit-Hartenberg convention in robotic modeling.
chipzfreak
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Homework Statement
Denavit-Hartenberg Coordinate System impossible
Relevant Equations
Basic knowledge of DH conventions
Dear all,

I am momentarily designing a robot arm and I will use the Denavit-Hartenberg convention to model my arm (see picture).

The problem I have, however, is that I cannot seem to define the robot arm in the parameters of a, d, alpha and theta. It could be that my coordinates are not correct, but I could not find an error there. The problems I encounter are arising at links 2 and 5. Could someone enlighten me with what I am doing wrong?

Thank you in advance,
IMG_20190503_113656__01.jpg
Thomas
 
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There's not enough information in your illustration or explanation of what your problem is, and I don't know anything about this in particular anyway, but I skimmed the Wikipedia article, and it had a link to the following video:

 
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