TD replications

[lota]

HelloIt is an interesting machine.How is the input without the lamp?

Lota

[Cairun]

Luc,


It is an interesting approach you've taken to measure the input vs output work.  And, again, impressive work!


Do you plan to measure the input work and output work by measuring force over distance like you've done for your previous build?
I think that is still beneficial.  I thought about ways to measure the input work and one way to do it is by attaching a string on the
outer diameter of the wheel and wrapping around the wheel then attach the string to your pull scale.  This allows your to measure
in linear force over distance. 


Regards,
Alex

[Nonlinear]

Luc,

This is again nice workmanship, but the concept is wrong because it can not prove anything. You have yourself recognized that there is at least 40% loss in the 2 motors alone, and then we still didn't count the losses in the gear mechanism which will be a lot again, and the friction losses elsewhere in the machine. This is just a waste of effort really. With all this work and expense you could have made a purely mechanical feedback loop from the output to the input with much less loss.

All you need to do is attach a large enough flywheel to the shaft that will store energy, and then drive it with the slider. This can be done by using 2 ratchet mechanisms like the ones in a bicycle rare wheel hub. This way you can utilize and rectify the strokes in both directions. The flywheel can drive the rotor. Since the expected torque from the slider will be greater than the one of the rotor, the slider torque will need to be fitted to the rotor torque to be in the right proportion.

[gotoluc]

A very impressive machine and remarkable craftsmanship!

Thanks telecom

HelloIt is an interesting machine.How is the input without the lamp?

Lota

Sorry lota, I don't understand your question.

It is an interesting approach you've taken to measure the input vs output work.  And, again, impressive work!
Do you plan to measure the input work and output work by measuring force over distance like you've done for your previous build?
I think that is still beneficial.  I thought about ways to measure the input work and one way to do it is by attaching a string on the
outer diameter of the wheel and wrapping around the wheel then attach the string to your pull scale.  This allows your to measure
in linear force over distance. 

Regards,
Alex

Thanks Alex

Yes, I will do force over distance measurement as well.

I agree!  a string around the rotor would be a good way to measure distance and force at the same time.

Luc

[gotoluc]

Luc,

This is again nice workmanship, but the concept is wrong because it can not prove anything.
You have yourself recognized that there is at least 40% loss in the 2 motors alone, and then we still didn't count the losses in the gear mechanism which will be a lot again, and the friction losses elsewhere in the machine. This is just a waste of effort really. With all this work and expense you could have made a purely mechanical feedback loop from the output to the input with much less loss.

Thanks for your comment.
I don't agree that this won't prove anything. We will see.
As for wasted expense, the only cost was $20. for the gear head motor from a surplus salvage store.
The rest I had on hand, even all the 3/4 inch plywood used to build the device was salvaged and free.
You see, I live a very frugal life style, on a $100 a week, so I know not to waste.

All you need to do is attach a large enough flywheel to the shaft that will store energy, and then drive it with the slider. This can be done by using 2 ratchet mechanisms like the ones in a bicycle rare wheel hub. This way you can utilize and rectify the strokes in both directions. The flywheel can drive the rotor. Since the expected torque from the slider will be greater than the one of the rotor, the slider torque will need to be fitted to the rotor torque to be in the right proportion.

Don't underestimate what I know needs to be done to convert the mechanical output back to the input.
Some of what you suggest would be needed but it's far more complex then what you suggest!...  since the rotor could not just freewheel.
Rotor and slider would have to be mechanically linked to keep the timing.
I'm sure Alex also knows this. As well, he and I know it would benefit to slow down the rotor once the magnets are in ideal position to the slider magnets to deliver maximum force stroke.

Regards

Luc