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Several years ago the CoRETS group posted a animated video about a novel SCARA robot https://youtu.be/P3iIIqFkSIc but there are no references to it in the literature. I cannot understand how the two motors shown are able to actuate the pulleys below given their location. The only thing I can think of is some kind of way to run one motor shaft through the other motor shaft. I am assume from the animation that there are two motors located above the arms and pulleys.

In the video screenshot below you can see that someone asked this very question but it remains unanswered.

enter image description here

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  • $\begingroup$ Yes it looks like coaxial motors. $\endgroup$
    – DKNguyen
    Commented Jun 23, 2023 at 19:37
  • $\begingroup$ look at an analog mechanical clock $\endgroup$
    – jsotola
    Commented Jun 25, 2023 at 2:22

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