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| Sharing some project planning phase: A (digital) ELECTRO-MECHANICAL Network |
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| RJSV:
(Diagram shows) cleaned up layout a bit. That's maybe, 3 hours, min, right there. I think I figured someone, (you...) would have paid out around $20,000 dollar, for this monstrousit..., Er, masterpiece. Up top, 'B' channel has that cute little 'TAP', which actually allows for lower friction (build-up). Each input, and output really, have rt. angle interface, to the external shaft set, (4), that interconnects, box to box down the line. Down below, in this 3-layer jobber, is the so-named 'MOTOR Layer', that is for positioning all three layers together. The output labeled 'CL' is 'channel C local', and that is your custom user feed. |
| RJSV:
Wanted to show, picture has the side view of the 'robot' dog. There are 3 movements, one is just tail wagging, that driven by an 'eccentric'; by that meaning a moving shaft/axel with wheel and a post, for eccentric action. So that goes back and forth, regardless of electric motor direction and polarity. For walking motion, is one output gear, and for opposite polarity, the output drives the head, 'bobbing' as the little audio board makes audio 'barks'... When motor is driving walking, (pretty lame), the front dog leg moves slightly circular: also used is a post, for the leg piece to restrain motion. Both eccentric drives have that feature, in front Actually the two sides are same shaft rotation, just in different phase, for shifty walking. In back (legs), the leg is just pulled back and forth, skidds or scratches in semi-realistic walking 'shuffle'. 3V motor has the typical 10 uF cap across it. |
| RJSV:
Here is view of whole package, wired remote. |
| RJSV:
Gear Ratios matter a lot, and there are a couple different situations going on here. For the 'transparent' aspect, you want as much lack of acceleration in the signal. This is because of the friction that can increase, when rotation rates vary; up and down. This is the case, even when overall gear ratio is at 1.0, and the reason being the non-linear friction, of various sources. In the photo/diagram, the 8 gears form various but average 1.0 ratio. The fact that some place(s), in the gear chain from input to output, will speed up the signal, like 40 to 20 for a 2X, that speed-up causes disproportionate more friction, during that couple if gears transition (of the rotaeasery signal). Then, point being, a following ratio, like 20 to 40 (2X gear-down), will not experience a '1/2' degree of friction (reduction) to balance out the increase. Current example the two diagrams are the gear ratio changes, experienced along the gear chain. Probably need a LOG (logarythim) where, 1/2 is same distance up to '1.0' on the graph, and a 2X ratio is, also that distance, up from 1.0. |
| RJSV:
A transmission line question is coming up: Suppose there are 8 boxes, each sometimes switching, but for now they all just 'chain', serially. That's 8 gears per box, at 1 : 1 ratios, for a total of 64 gears, probably typical 32 tooth nylon. NOW... What happens, when your processor gives out a 250 mSec pulse, to the motor (that's 300 mA little pm motor)? I figure an impulse into typical toy gear chain, will take, maybe, 240 mSec. before the third station output starts rattling to life. (Another TECH term). AND, figure not much flywheel effect; the gear train prob comes to slimy HALT soon, like 100 mSec after the 3 Volts gets stopped. So I tried to graph that Please see photo |
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