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« Last post by webby2 on March 25, 2024, 04:28:45 am »
Having a small issue with not being able to upload a 35m file that is a .mov of the thing working to spin the upper half one way and the lower half the other way.
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« Last post by webby2 on March 25, 2024, 04:23:04 am »
a single one sided groove so the path can be seen
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« Last post by webby2 on March 25, 2024, 04:22:23 am »
a 4 groove setup
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« Last post by webby2 on March 25, 2024, 04:21:07 am »
a different take on a worm gear
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« Last post by webby2 on March 22, 2024, 03:55:46 am »
This is a little petty maybe but I want my test-part to use a different storage potential than the test-bed. The test-bed uses CP as the storage medium for work transfer and it looks like I can do something similar with the test-part but I want it to do things differently.
If I look at the "how" that may work and then look at what I thought the test-bed was doing,, well I might of over-thought the "how" for the test-bed.
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« Last post by webby2 on March 22, 2024, 03:43:55 am »
I can add any number of sources to the slack side so long as the added force into the belt\chain is in the same direction, it would not be a source if it were not in the same direction.
To make or impart any FORCE there must be a force of opposition, an output if you will, or a sink. This point of opposition then determines the tension side and slack side and if the system were closed upon itself, like a belt or chain usually is, then I can instantly change where the slack and tension sides are, source and sink.
I can also have any number of outputs ,and as it should be the output(s) must equal the input(s). Any force potential that is not used by one of the outputs is passed through to another output that may be at any point along the path of the belt\chain.
Since force does not have a velocity or a distance then the modality of how the force is manifested does not matter. In the real world you just can not have your sources run through, physically, any other part.
So the belt\chain then, in a sense, becomes a storage medium for potential similar to momentum and how that potential is depleted is how the work is performed.
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« Last post by webby2 on March 10, 2024, 01:20:37 am »
another note; a belt and pulley or a chain and sprocket are one-way force transfer devices. You can not transfer any force on the slack side of the belt\chain. You can MAKE and external constraint system to allow you to transfer a push for either but by themselves they can only transfer a pull.
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« Last post by webby2 on March 09, 2024, 01:41:55 pm »
just as a note; I am using gravity as a source, BUT, I have to supply both the motive force and the force of opposition, both of these are courtesy of gravity.
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« Last post by webby2 on March 09, 2024, 01:37:40 pm »
making parts and playing with things,, fun stuff. So I have made this one setup that actually has a few rough spots but for the most part moves OK, a little resistance but it rotates. I found 2 electric motors that weigh 80g and am using those for my drop weights. In the setup I am playing with right now I have 4 pulleys that go round and round but do not rotate  Roberval anyone. I have my 2 drop weights on opposite pulleys so the system should be balanced but it is not, both weights move the same distance, one down the other up and it is always the same weight, within this range of rotation, that will fall with extra force raising the other weight. I actually was expecting either nothing, or the opposite of what I have so this is getting interesting.
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« Last post by webby2 on March 02, 2024, 08:28:12 am »
I have rebuilt my test-part, I have made it smaller and with only 4 subsystems.
They all are mounted in bearings on a frame and they are all connected to each other with a single common part. They are all connected so that there rotational change is the same and in the same direction as each other.
I have test pulleys that are 31mm radius and are mounted on each subsystem shaft. I am using these to test input and output stuff so that I can identify and follow what the feedback systems are within the whole system.
On one pulley I have wrapped a string with a 180g mass hanging on it, well I can not find my other 180g mass right now so on another pulley that is opposite the first one I have wrapped a string with a 250g mass hanging on it.
The drop and lift distances are the same due to the pulley radius being the same and the angle change being the same.
There are force changes within the systems and in one point of view that can be viewed as a 3:1 and this is where the feedback part is that I am looking into, it should cancel that advantage.
So,, I start the first test with the 180g mass low and the 250g mass high, let the system slip through my fingers and the 250g goes down and the 180g goes up nicely for a 180 degree rotation. Now I reset my system for the other 180 degrees of rotation but I set the 180g mass high and the 250g mass low.
I use Mr. Finger to help the 180g mass to move down, a small amount of rotation and the 250g mass will drop back down, go past that value and the 250g mass no longer can lift the 180g mass, Mr. Finger is noticing a "heavy sluggish" feel but it is the same for either direction of rotation, keep rotating and Mr. Finger notices this "feeling" is reducing until there is a point where it is very easy to rotate the system in either direction a little bit, 10-20 degrees.
I tried to add 70g to the 180g mass to see if it would lift the 250g mass, well it did not work so well and the sluggish feeling got much worse.
I have to improve a few parts and then make sure that I have not created an artificial force potential with the setup, nothing like loading a spring without realizing it to mess with things.
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