General > General Technical Chat
Sharing some project planning phase: A (digital) ELECTRO-MECHANICAL Network
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Bud:
Can we nominate this thread for the longest Solo thread of the Forum ?  :box:   :D
coppercone2:
I just mean that the failure modes of timed mechanical systems are interesting, since you are getting into pretty precise timing. When you start counting miliseconds thats getting precise. I like how the calculator loops harmlessly rather then getting jammed up/broken by incorrect input. It could have probably been built so that it explodes gears when you divide by 0.
RJSV:
Actually, I had been thinking; What about a video, that can run any program, or PLAY any video...
Was this an old-school prank play?
   Spatt:
   Run Splatt;

At any rate, you get that (120 millisecond) glitch, when even the follower stage has CCW coming in...
You get a 'pull-away' transient output, very un-planned, but surprisingly benign.
Like, when an un-designed feature sends that 'backwards traveling' signal, but to un-selected output of something...Not even touching...
RJSV:
   Here is (photo), almost buildable, and that's really only two gear assemblies...
   To start your SQUARE WAVE cycle, a 500 mSec impulse, going CW or clockwise rotation the INPUT comes up, feeding through to the Output TD-3.
TD -3 is kind of a 'Normally Closed' switch; when it is turned it disconnects, typically in 90 mSec.

First, TD- 1 starts the swing, over to contact the next (TD-1), and, notice that TD-1 times through a bigger swing, than 60: It swings about 85° for a delay of 400 mSec, before starting the disconnect to be 90 mSec 'fall time', of the impulse.
It was fun to go ahead and skip any 'intermediate' gears that would connect the two separate timers!
RJSV:
That last schetch featured a 'disconnect', at 90 mSec and a good place to point out: that 'TD-1' timing set has a, literally, positive assertive time-out, that being the little impact, and connection to overflow Output gear.
Looking at 'TD-3' that's not the case, as the Output just becomes unconnected, and so does not work any loads, as it slows to stop.
   So the task is to time the next part, of the SQUARE WAVE, that's the OFF or stationary, for 500 mSec.
But first, to get that start, best way is use another gear, for timing a specific, assertive end to the pulse time, regardless of exact match, or not, with disconnect and stopping.
   Of course, any TEST EQ like this, adding some components is no big deal.
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