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I frequently bang my head on my desk after performing a task poorly. I would like to eliminate the unnecessary middle step of actually performing a task poorly. As such, I would like to design a system to hold my head and repeatedly strike it against my desk. Alternatively, a system that holds the desk and repeatedly strikes it against my head would be acceptable. Requirements are at least 2 strikes per second maximum with ~50cm travel.

Can anybody make any recommendations for a system to base this device off of? Denso products, while small and affordable, do not have the required load capacity (some users may have a rather large head, and involuntary resistance is to be expected -- at least near the start of the cycle). I am thinking of something more industrial, perhaps:

Fanuc R-2000iA

Jason C
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    Easier to get a manipulator to grip the head and twist it 360 deg. Problem eliminated. – metsburg Nov 18 '13 at 04:45
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    According to http://deepblue.lib.umich.edu/bitstream/handle/2027.42/1256/32105.0001.001.pdf?sequence=2 p. 186, the range of motion of the human neck is ~77-129 deg. front to back, ~48-86 deg. side-to-side, and ~113-149 deg. around the spinal axis. These lower requirements could potentially reduce cost. A sufficiently advanced system could start with a cycle of strikes, increasing in speed, and end with a rotation. I also seem to recall that the neck can withstand 4kN (900lb) of force along the spinal axis -- I do not know if that is significant for system requirements. – Jason C Nov 18 '13 at 05:04
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    All righty, get the manipulator to 130 deg pitch, 90 deg yaw and 150 deg roll, followed by a clean strike at 4kN force. Fail safe and efficient. – metsburg Nov 18 '13 at 05:19
  • Hahahaha, very funny, but it would still be useful if you mention (after the joke) what your real application is. You may receive ideas on how to solve your original problem! – Shahbaz Nov 18 '13 at 13:54

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