| General > General Technical Chat |
| Sharing some project planning phase: A (digital) ELECTRO-MECHANICAL Network |
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| RJSV:
Wanted to divert, for a minute, to outline the TOY hand control, having a clever polarity reversing scheme Both push buttons have a terminal, both normally connected to the (2 cell) batteries minus (-) terminal. So, by pushing the RED button, for example, the toy 'red' wire gets connected to battery plus (+). For the opposite; pressing the BLUE button, the TOY 'blue' wire gets connected, to battery plus (+). Since in either case, the TOY does get voltage supplied, via it's two wires, you get a 'reversable' or bipolar motor activation. (Picture showing the dog bone shaped TOY hand control.) |
| RJSV:
This second picture shows how the plus and minus battery voltage are brought out to two little tabs, for contact when either button is pushed. Please see little screwdriver tip is just above those two little stationary tabs, for contact when moveable tab(s) on each pushbutton happen to be pushed (button has usual springs and captive housing.) |
| RJSV:
This TOY DOG mechanism shows the scheme for separating out rotation direction. Clock-wise coming in from motor, ends up same, clockwise or CW for short. With motor sending counter-clockwise, (CCW), the what I'm calling 'Square shaft', which is the main axel for turning, on both right and left sides. The main point is to show, a bit hazy, but in middle of photo, notice the gear has small gear integral, and the small gear now, drives another little gear. That can toggle back and forth, due to to rotation itself causing a rotary force (or reactive). Result is kind of like a 'Rotary Diode'. The mechanism gears the motor down a bit, then positions that little moveable 'inter-gear', so it's effective path switch. Also, though, this is also resistant to backwards applied rotary force, at least in the one direction. It's like it 'slips', when wrong direction trys to drive it. |
| RJSV:
This view s bit closer, of the little moveable gear. |
| RJSV:
Just stumbled upon a basic function I need anyway, and that is for some 'slip' or other factor that lets me send a bit 'too much' rotation, to reposition that toggle arm. This set-up, shows first, emphasis on the movable bracket with inter-gear. That whole thing, when toggle is is in 'drift space' between either output gear, that whole toggle bracket etc is basically a 'sculpture', a 'blob'... until that encounters one or other output gear. I estimate, a swing of about 30 degrees, over time of a quarter second (250 mSec), and some thing like base motor at 1100 rpm est. When that interim switching state finishes, that little gear impacts into the gear edge, the output gear to be driven. A big gob of green grease was seen, might help make that little captive gear from turning, during that initial free flight rotation, to impact. |
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