Eccentric

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These are some data points I have collected during some shake down runs with my modified system.
I am not claiming anything other than I find the results interesting, they do not prove anything.
The no load runs were with the system complete and all parts moving.
The holding hands runs were with only the Sun gear installed.
The loaded runs were with an open TT motor using the 3:1 gear but the system has an initial step down of 5/6 then the 3:1 step up, or 2.5:1

Holding Hands
2V @ 0.41A to 0.47A
6V @ 0.58A to 0.65A

No load system run costs
2V @ 0.44A to 0.54A
5V @ 0.53A to 0.65A
6V @ 0.61A to 0.71A

Loaded system
2V @ 0.46A to 0.56A
6V @ 0.75A to 0.91A

Direct out
2V @ 0.58A to 0.68A
5V @ 0.59A to 0.72A
6V @ 0.59A to 0.72A

What I find interesting is that the 2V geared up RPM delivered to the TT motor is about the same RPM as the 5V direct out.

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so I did a few runs loaded with a resistor across the motor and a little volt meter and diode bridge reading the voltage.  I have 2 100 ohm resistors in parallel for 50 ohms resistance.

using the 3:1 aka 2.5:1 gear
Input 3.5V @ 0.84A to 0.94A
output across 2 100 ohm resistors in parallel
0.52V to 0.63V

using the direct drive
input 7.5V @ 0.72A to 0.93A
output across 2 100 ohm resistors in parallel
0.54V to 0.84V

I turned up the input voltage to get close output voltages, the same motor with the electronics on it was used on both test points.

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I made a few more runs that Claude asked for and had a few issues with the system but kept going anyway.  The data has kept moving towards what the mathematical model predicts.

One known issue is that my printer/slicer does not make nice circles or squares, they are a little distorted and I think this is leading to most of the variation I get with the readings.
Another thing I just did was using a clamp on multi-meter.  It has a nice feature of a line graph function and watching that it shows a rhythmic variation with the large spikes in draw, it also shows those spikes are very spikey.  It also averages the readings so the numbers are not all over the place but watching that there is a subtle pattern that might be a possible motor issue as well as picking up on the missing motor.

I think I will need to reprint the whole thing and stiffen up the main frame a lot more, I can watch the meter change while I tweak the frame by flexing it.
I also tried to change the offset alignment a little bit and then compare the cost of run in both directions and a very small change gave me a very small change in cost, one way had a lower draw than the other by about 0.02A

Another note worth making is that I built a test "stick" that had a TT motor, a diode bridge. 2 100 ohm power resistors, a battery and a small volt meter all glued together so I could take it an move the same test load device from testing point to testing point, so the readings were for the actual same test load.

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I am printing off some new parts, right now it is a new frame that is much stronger and with a few changes I made with my slicer and printer hopefully the eccentric prints will be much closer to true.

Looking over some of the test numbers from yesterday for a few runs I did for Claude it struck me that an electric motor torque is related to the current draw.  What I noticed is that the draw from the motors was close but the voltage was not,  so to me that seems like it was the same amount of torque needed but with the system making twice the RPM out meaning it only had to spin half as fast.  This is over simplifying things but I think my point and observation is valid.

One of the inconveniences of this design is that I am spinning the output generator/load, well I thought about that and came up with a variant on this concept that allows the generator to stay still.  The amount of gain might not be as much but if I can spin a generator for half of what it puts out then that is a good start.

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On a different note.
Has anyone noticed that this is geometrically locked into existence?

What that means in a nutshell is that I can take the Ring gear and the Sun gear and make them huge,, really huge like a meter or more in radius and I could still move in a 10mm orbit.  Now a 10mm shaft arm would not take the load of something much bigger that what I am building so that means that the arm length would need to be increased to the size of shaft that is needed for the torque being transferred.  So a 20cm arm changes the orbit of my input as well as the ratio between the Ring gear and Sun gear, so that would be like 1m radius sun gear to a 1.2m radius ring gear for having a 20cm arm.

How much torque can you make with a few Newtons of force and that comes at the cost of those Newtons rotating on that 20cm arm orbit.

If this can get only half way to the model value of 10:1 at my scale, then that is still a good amount of work that can be done.