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mild

PierArg said:
mmmmmmmmm... something doesn't come back to me.
I'm sorry the question, but have you made such a system? if yes, it really works?
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mmmhh. .
I didn't want to get there so much... but actually I think there are some unstable points. . .
 
zero angle will never happen.
We haven't realized it yet, but we're working on it. you will probably need to decrease the maximum loads to hold.... .
 
AlberTz said:
zero angle will never happen.
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similar statements I've heard a few times before.
Generally, after we had to put in motion a reed, flex and welder! :frown::rolleyes:
AlberTz said:
We haven't realized it yet, but we're working on it. you will probably need to decrease the maximum loads to hold.... .
Click to expand...
excuse the objection, but if you can decrease the loads it means you have overestimated them!
but is this with levers a fixed solution or a "half" of some kind?
 
no no, no angle zero will never happen xké I say it (and because the thrust at the point would be a little too much).
as a type of mechanism, we are not bound to this choice, but it is so far the best easy-to-produce/technologies/costi compromise.
 
As I said, the problem is that with rods aligned horizontally (5° are too small compared to the lengths in play) and with arm hinged power at the center, you will create a vertical push that will be "absorb" from the cart.
the cart will not move to the left but will tend to contrast the strength of the crank.

to improve the situation you should (paradoxically) reduce the power arm. if from the point of view of the forces it worsens, from the cinematic point of view it improves
 
PierArg said:
As I said, the problem is that with rods aligned horizontally (5° are too small compared to the lengths in play) and with arm hinged power at the center, you will create a vertical push that will be "absorb" from the cart.
the cart will not move to the left but will tend to contrast the strength of the crank.

to improve the situation you should (paradoxically) reduce the power arm. if from the point of view of the forces it worsens, from the cinematic point of view it improves
Click to expand...
the basic idea is:
the weight must move vertically, and the only solution is to have the handle equal to half biella. so as lengths I would be quite stuck.
but if I have to lift the red load (turning the crank clockwise), if, as you say, the cart will not turn left, are "faciliated"?
 
So much attention... on the basis of mine [poca] experience, the basics to make a catastrophe there are all:
- unclear system requirements (cases that "decrease")
- unbelievable working hypotheses on whose veracity is extinguished
- cost analysis leading to out-of-standard solutions (read: "if nobody does, there will be a reason")

I would be so scared. we use the cannello for much simpler assumptions.. .
 
Fulvio Romano said:
So much attention... on the basis of mine [poca] experience, the basics to make a catastrophe there are all:
- unclear system requirements (cases that "decrease")
- unbelievable working hypotheses on whose veracity is extinguished
- cost analysis leading to out-of-standard solutions (read: "if nobody does, there will be a reason")

I would be so scared. we use the cannello for much simpler assumptions.. .
Click to expand...
In fact we are making a prototype, so the error is contemplated.
But I didn't understand your second point.... what do you mean by x hypotheses of unbelievable work?
 
 
So what? I don't understand what you're saying. It's a movie theater, okay. There are some starting conditions that don't seem so wrong. to solve the problem of the impontament of the cart just put a compression spring that pushes the cart during the start and can be exploited up to 50% contrast with the torque supplied by the motor, so as to facilitate the rotation of the motor.

w the experimenters. if they want and can, why not?
 
AlberTz said:
...but if I have to lift the red load (turning the crank clockwise), if, as you say, the cart will not turn left, I am "faciliated"?
Click to expand...
I try to explain myself better: the translating cart needs the power arm thrust to have a horizontal component as the vertical one is discharged on the cart itself.

at 5 ° the horizontal component actually there, but it is negligible.
 
so I try to reveal the mystery:
that scheme I put you down really is overturned:
is 1 of 4 "suspensions" for a robotic trolley that can lift high loads (to facilitate man), to transport furniture, washing machines etc....in reduced spaces.
Of course the conditions are critical, I know. but we of nuzoo robotics like to be innovators of service robotics:-)
therefore understand the problem of such loads....
cmq excellent links of Roman lightning!
 
AlberTz said:
so I try to reveal the mystery:
that scheme I put you down really is overturned:
is 1 of 4 "suspensions" for a robotic trolley that can lift high loads (to facilitate man), to transport furniture, washing machines etc....in reduced spaces.
Of course the conditions are critical, I know. but we of nuzoo robotics like to be innovators of service robotics:-)
therefore understand the problem of such loads....
cmq excellent links of Roman lightning!
Click to expand...
I lost, could you kindly put the correct pattern?
I don't know what you mean by "fuck"
 
the red load, which stands at the top, is actually a standpoint and therefore remains low. giving couple to the blue engine, all the part that contains it inevitably arises.
therefore the resistant force actually pushes on the opposite side.
I had put it on the contrary to facilitate reading.
 
from a quick look I start that the real problem of your system (from a design point of view, not from a constructive point of view) is how you intend to use the engine. cable car, sprocket, screw, chain, belt... which transmission-moving system do you intend to use?

p.s. beautiful links of fulvio
 
PaoloColombani said:
from a quick look I start that the real problem of your system (from a design point of view, not from a constructive point of view) is how you intend to use the engine. cable car, sprocket, screw, chain, belt... which transmission-moving system do you intend to use?
Click to expand...
the problem is right there: I have little space available to lift a big load, so what do you recommend? for that I was talking about precarious, so I can decrease the size of the engine.. .
 
AlberTz said:
the problem is right there: I have little space available to lift a big load, so what do you recommend? for that I was talking about precarious, so I can decrease the size of the engine.. .
Click to expand...
the transmission system is a design choice based on a variety of data and considerations that we do not have on a forum.
you should make a table with up: cost, bulk, stiffness, lifecicle, etc. written for each transmission system and then from comparison should result in the choice of the most suitable transmission type. It also considers reliability, for example a transmission through screw-modrevite is very reliable, a transmission by rubberized-asphalt wheel is unreliable.

the power of the engine depends on the time within which you want to complete the lifting.
 

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