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| Sharing some project planning phase: A (digital) ELECTRO-MECHANICAL Network |
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| RJSV:
My first choice is to continue my work today, amid bad news/war, for many. Yes, I watch, and argue among friends...(we disagree). So, please forgive, I see the troubles, but work is work, so... ========================= ========================= ========================= Going into a modeling / prototype phase, for the (Mechanical) Data Network, but also interested in mechanical LAB DEVICES, instruments such as Square Wave Rotary Source Generator. As to the timing: I'm looking for what I like to call: 90 / 250 ...which means typical expected is 250 milliseconds, to travel the moving switch TIP, and 90 mSec; that's how long you get rotary output, when 'pulling' the switch gear out of contact / engagement. The 250 mSec timing possibilities are nice. All without any explicit 'gear train', at least not fully For estimating: The thing obviously takes some (wild) fraction of a second, and most certainly not 'zero' elapsed time, ... 250 mSec has a darn good chance ! Audio sounds, like quick loud hand-clap, are fairly close to 50 msec, and a 'slap-back' from (concrete wall) nearby, that's around 50 to 120 mSec. That Toy I'd mentioned, dog's tail moves about 4 to 6 times in one second, I figured. That's approx 170 to 250 mSec. By the way, in case wondering, the TOY runs at rate of 2 hz, at the later stages, into the directional switch. ?? Numbers don't match, above, but will figure things out, with that 'open face' special model (see photo of prototype, with transparent face, for testing.) |
| RJSV:
Taking a look at speed parameters, and the increased voltage pulses, the numbers come out to a shockingly LOW LOW 1 / 17 MPH ... Yes, that's about 6 % of 1 MPH ! figured like this: Second half of (toggle lever) travel, at 150 mSec point (of 250 mSec total), things are up to speed (in viscous grease), say that 1/10 inch takes another 100 mSec of travel: That's an easy 1 inch per second (0.1 inch in 0.1 sec). Now, that rate can be increased, by using DC pulses higher than 3 V, say 9 V, for 9 times the power (SQ law), that the 3 V runs at. Maybe, est 300 mA X 3 V is only about one watt. Now, 400 mSec might even be too much ( heat gen), in a 500 mSec ON, 500 mSec duty cycle (50 %). Maybe the 250 mSec pulses, issued thru transistor buffers, would be tolerable for shorter runs. Heat sink, on motor always possible... With shorter swing ARC, right now, could get switching times down, along with that motor pulse Voltage increased to 9 V, 600 mA (transient 1/2 watt). Perhaps, times reduced, to 90 mSec 'rise delay', and also reduced 'fall time', or 'disconnect duration' (Actually, more like a little delay, then gear winds down). That's easy some 35 mSec...with any luck... Some 4 Hz potential, without too much unusual construction. |
| RJSV:
This enclosed diagram lays out typical switching time durations, (to accelerate and move the switch toggle lever). Using Google, the typical EM relay (mechanical moving contacts), operates at several milliSeconds travel time, with specials doing 100 uSec travel times. So, that is a benchmark curve set; SEE LOWER CURVE, please. Up top, with an easy, demonstrated timing clustered near 200 mSec, readers should realize; that kind of time, basically one fifth Second, is on similar time scale, as a quick arm and hand movement, (in sports, etc). Going under 1 mSec for a mechanical device, that's just awesome. ...Using previous thoughts, that 'speed' would be: 250 X the 1/17 mph calculated. So...that's 14 MPH average for the 'TIP Gear' ARC swing. (If I did that correct). GOOGLE 'Small signal relay' for more history info on that older technology. Some scientists get bored with this sort of (endless seeming) narration, covering a single switch action, blah blah blah: BUT: I've also heard that, in the past, many SEMICONDUCTOR INDUSTRY people spent lots of time, on 'pesky details'...too. (Lol, TIC). (That's 'Tongue in Cheek). -- Rick B. |
| RJSV:
For a bi-direction data interchange, couldn't be simpler: For reading a Switch, let's say it is a thermostat, or something...this (scetch in photo) shows a few boxes in series. To read your special switch, (of course, when at box # 14, or wherever), BASE Station sends, via shaft 'C'; that goes thru sensor-switch and, thanks to BUS method, is able to DRIVE the 'A' BUS shaft. That, of course, goes to every Station, but this action is done while box #14 is in 'SELECTED' Mode, meaning some drag on the 'A' shaft, but only one Box at a time, anyway |
| RJSV:
Continuing on, with a second photo, filling out that mini-Network; And now shown, on right side, from Station #13, That box is doubled-up, with separately addressable Station #14, for doing that M1 'motor' function, to move the Switch that can be read, later. So the two stations would be in same box, and cable of sending the 'single bit', of data, really, and BTW encoded 'rotary', that is CW = 1, CCW= 0. Notice, maybe, you can store '1 bit' that way,...right there in the remote box. (And simple, too!) |
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