Thread: control system programming
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Unread 23-06-2002, 22:13
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#0047 (ChiefDelphi)
  
Join Date: May 2001
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Re: Clever Software is no substitute for Rigid Hardware
Posted by Mike Gray.

Engineer on team HOT from Huron Valley Schools sponsored by GM Milford Proving Ground.

Posted on 3/2/2000 9:32 AM MST


In Reply to: Clever Software is no substitute for Rigid Hardware posted by Joe Johnson on 3/2/2000 9:03 AM MST:



You are right Joe. Software should never be used as an attempt to 'fix' a poor mechanical design. Software can however enhance greatly a good design.

In '98, we used parallel 4-bar linkages driven by separate motors. Warping was actually a feature, in that the end-effector could be skewed up to 30 degrees simply by driving the linkages at different rates.

For '99, I used 2 sets of compound 4-bar linkages to for the extensible member, each driven by a window lift motor. Learned a lot about motor variation, as 'warp' or 'skew' was not desired. Chose to match motors or adjust drive ratios rather than 'fix' the thing with software.





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