grass size autonomous navigation

[MBT]

probably this forum is not suitable for my discussion in the sense that I might have entered into a different context than I thought. Why did I come to this forum? following a discussion about hydraulic transmission. I am 61 years old and since I was a child I have realized things about which the "normal agent" said: but already exist, it is worth doing them.. etc. etc. as if the world was already complete and we were just spectators consumers. Unfortunately the countless regulations today ghettoize the DIY when I was 14 year old (in 1969) I realized a vehicle that today you would call quod, at 18 I made a device to feed the cars to gpl the product albi vr77 (there was the austerity) that together with my cousin, in his workshop, we produced and sold in numerous installations. at 23 years I realized the 3d jolly motorcycle (which made 47 km with a liter of diesel), we produced a hundred. I've found and bought back one I have at home, working. even in the valley (motocarrozzetta valjolly). and there in addition to the frame and bodywork in resin glass I made the change and differential group (so design, construction model, aluminum casting, processing of trees and gears, cementing,...) the so-called albimotor and still I was not an engineer. then in 1996 my cousin died, the workshop closed and I devoted myself to teaching and consulting in the field of industrial automation: mechanical, electronic; therefore also software pc, plc and micro controllers. Now I feel like doing something. from here weed size.

I'm sorry you feel disappointed in the forum
I'll tell you my point of view. .
It's about fifteen years that I work in the field of "special applications". machines or solutions that others have not wanted/powered to face and have arrived on my desk.
You know what I figured out after these years? that most of these problems had such simple solutions that they did not want to be applied. things that were easily found on the market but which required mental elasticity to be accepted. procedures that had to be changed, but rather than changing them you prefer to create a new ad hoc machine.
meditate people, meditate.. but not on beer!

 

[kf00115]

engine: I think one of these, from 150 -200 European 3600 turns 5-6 hp (if not baran)
output below or side ,(maybe better for the things I have to add)

group gearbox differential gearbox and differential ape50 scraped therefore also retromarcia
I don't have the clutch, but I think I'm going to strap it up with galoppino. (up to 6 - 7 horses I made similar in the motors of the conveyor belts). I have to disassemble and separate the change, make a closing door and fix the pin entering.

differential, steering etc.

differential + steering wheel for the other two wheels or (as well as interlocked vehicles) without steering. since I have wheels with brake bolts, if brake wheel dx turn left and vice versa.

then disposition completely: width of the middle, as much as the diameter of the rotating blade so the wheels do not beat on tall grass but only on cut grass? square structure with axis in the center (such as electronic robots) so I can reverse a wheel block and rotate in an ideal point in the center? so very handy. But for the balances, slowly everything.
Meanwhile a question: rotating blade radius 40 cm (x example) medium sharp, how many spins/minute could serve? I have no experience in this case.

 

[kf00115]

in line of maximum

 

[Fulvio Romano]

and why should this forum not be the right place?
poor competence? excessive presence of cocks? excessive sensitivity to sarcastic jokes?

I built a moving robot at 12 years using the electronics and mechanics of a needle printer, does this make me an engineer or a robotics expert?
at 12 years I believed it, then I enrolled in engineering, studied, took a degree in mechanical engineering, a specialization in industrial robotics and designed robots for ten years. Do I consider myself a robotics expert today? to today I feel much less confident about this statement than I was twelve years old, and this without wanting to unleash socrates, just browse a catalog of a subscribe and not be able to understand the reasons for the reintroduction of articulated parallels, if the choice of an encoder or a resolver is technical or political, if an isokin hardware architecture is more or less reliable than a general purpose, or trivially if a green robot respects the specifications.

then you come, and you want to build an automatic mower. You wonder if you use a blast or electric motor, but then you talk about pwm. you ask that blade to use, and then calculate the torque to the wheel using the formulas of the torque model that works like the law of henry applied to coca cola. you don't have design specifications, you don't know what power to install, you don't have a market goal (on Sunday morning you can cut the condominium garden with a two-time stinking motorcycle) and steps from wanting to reuse the change of a bee to the detail specification of a microcontroller for the direct calculation of the torque and power passing through the currents of armor. and then discard the electric motor because that of your friend downloads the battery, without let us know type of engine, power, type of lawnmower, etc.

you did not receive answers simply because you did not ask questions. you shared an incomplete information package, some of excessive detail, others of unusable generality.

Do you want a couple of suggestions?

1. throw in the toilet all the arguments made until now and start again from the beginning wondering exactly what you want to get. garden size? like weed? if you walk through a hedge you want to shave it to zero or do you want it to freeze? What mission profile? Default? self-determined? if self-determined, based on odometric or statistical algorithms? Leave the gps, on, realize how a gps works and that in a garden two meters per three is totally useless.

2. begins to make a drawing of maximum, at least of the encumbrances, weights and powers. Don't get your hand taken with the detail. It is not important if you use a pwm or a four-square control, it is important to know if the thing manages to bring a tank, the windings of the electric motor and the battery pack without sinking into the muddy soil after a rain.

3. reason about using an alternative engine (= to burst, even if there is nothing to burst) for cutting and charging the batteries of the electric one you will use for movement.

4. arduino architecture

5. Take a look at the rover on www.robot-italy.com6. take what writes mbt for gold

7. ignores the bullshit that says Roman lightning

 

[MBT]

6. take what writes mbt for gold

7. ignores the bullshit that says Roman lightning

on these last points I feel dismayed.
I know how much a bonobo can know about nuclear physics

of the specific skills. . .
in what a "expert" says there is always a pinch of "imbecillity" and vice versa in what a perfect idiot says there is always a fragment of "truth".the designer "saggio" should be able to take the best from both.. .