General > General Technical Chat
Sharing some project planning phase: A (digital) ELECTRO-MECHANICAL Network
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RJSV:
All kinds of so-named 'RUN-OUT'  schemes can be tried, for generating (surprisingly short) impulses.
First of all, just a simple Run-out can be done, shutting off motor power (the toggle pulls clear), and subsequently the toggle stops it's arc of travel.
   But, importantly, an output is tracking that short bit of inter-gear 'drama', uh...and that means Output stops soon, too (Output is essentially in parallel with the TIP gear).
  Took a sec. to illustrate some possible Spring Detent, there...
   Now, I say that switch Toggle travel, in that 60 degree ARC, takes, est 240 mSec. (divides out to 4 mSec per degree, average), and, showing in the picture 11 degrees of swing ARC, why isn't that, 40 mSec ?
Well, the 11 degrees of start-up travel are probably the slowest, due to huge GREASE viscousity.
Plus, please note that those three gears, in photo there, don't turn, or at least AREN'T WORKING.
They could just as well be sculpsures (my favorite),
or...heck... little toy 'King Kong' figurines, those being transported / dragged upon the disk of their fate (The regular big motor gear disk)
RJSV:
Looking at (this) photo, Readers may wonder: That looks a mess...how could such a wild
   ' A LION, STANDING ON ANOTHER LION'S BACK'
...how could that, you know, work ?

(It does the compare you'd need, in a PW servo.)
RJSV:
(double-decker)
RJSV:
...That double layered, does some fancy footwork: first, the lower half will position the upper, within normal 0 to 60 degrees pivot.  Then, second, the upper layer (yellow components), is simply spun, a little, and is designed for that to be irrelevant.
   Notice, way up top, the red gears bring in the 'minus' or negative quantity, for 'backwards' subtractive effect, on this compound toggle.

   This would do, for example, 200 minus 190 = 10 mSeconds.  Now, really, the actual quantity is gear tooth count based, and some slip/ drag.

  Anyway, the result is an 'error' signal, to be fed to the static PW Proxy.  Hopefully, as a servo, next time the error comes down.
RJSV:
  Regarding that Pulse Width copy process, for SERVO use, the included diagram features a 126 milliSecond count, against a 118 mSec duration 'Test' case, for determining SERVO response:
   Sorry, the arc of travel, of the moving TIP gear should be shown as 'running' in, (or back), not as 'running out'.
That's running out, to a moveable stop, on the right, but no overflow.  Could be seen as a prep move, for next impulse, to be, again, with ARC of travel back towards the left overflow gear.
(SEE how easy, things gets bass-ackwards....
The 'subtraction' process is quite adroit: coming up with an 'error', as the first (top) timing is longer.
   Process is to then feed that 8 mSec 'error', back to the adjustable stop, in this one, repeatable SERVO action.
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