post #41 of 41
Quote:
Originally Posted by Livefreeordie89 View Post

As long as the gears have the EXACT same RPM and start at the EXACT same position, then it doesnt matter how fast they are moving or how they are moved.
Quote:
Originally Posted by DuckieHo View Post

The "EXACT" is the hard part....


It really would just run off of a high PPR encoder feeding the controller that powers all 3 drives. Each gear would start off with whatever offset it is to not have the teeth hit each other and then as long as the drive can properly send its control signals to the servo's then they will always stay the same and never touch. Feedback from the servo helps maintain stability in the drives to keep them balanced but I dont want to get into highly technical detail here.
The moving back and forth side to side motion is just theatrics that doesn't matter at all. Makes for a nice demonstration though. I use a lot of systems that deal with servo drive technology, not a lot of systems can maintain this accuracy level at 4,500 rpm and up higher though, that is the impressive part. Ill have to look into buying some of these for new projects since I am always having trouble getting the speeds I want out of the system because most servo's we use at work right now have a max speed of 4,500 rpm and continuous of only about 3K. Having capability to run short durations at 6K rpm would be amazing for me.

Quote:
Originally Posted by MagicBox View Post

It's more of a demonstration of the motors than it is about the use of running gears synced like that. It's quite a feat to have step servos have such RPM and still be so precise as to actuate those gears as shown.
Stepper drive systems are not even close to the capability of real servo drives. Very different things


Quote:
Originally Posted by GingerJohn View Post

I'm trying to think of other applications for this technology, automated or machine assisted surgery is one idea. The level of control available is far greater than any human surgeon could hope to achieve.
It could increase accuracy and speed of devices like in this video. This video is of a really old style robot that is moving sort of slow and not doing very much. Now days we are already far more advanced:
http://www.youtube.com/watch?v=vp1N3desi_g
Here, a much more advanced (yet still old) robot that these servo's could also help accelerate:
http://www.youtube.com/watch?v=Gv5B63HeF1E



Quote:
Originally Posted by Vagrant Storm View Post

The first thing I thought of was helicopter blades....more blades equals more lift. would have to be on a electric motor though to get this much control though

Not really the right motor for that application. It would have to be a MASSIVE servo to get the proper power to spin the blades and maintain control. The momentum would be a hard task to overcome as well, servo's do NOT like being out of position sync. Too far and they will throw an error and shut off. Also the size of the servo would take way more power than any generator could give with modern technology that would be able to fit on a helicopter. Seriously, you would probably be looking at something like a 15kW servo drive, then you need 2 of them to even have a point to doing this sort of tech so you are looking at trying to be able to push 35kW from a generator to power these and everything else in the helicopter. Sure you can get that, but not in the size (and weight) it would need to be to integrate into a chopper, not to mention efficiency of such a setup would be retarded. It is much easier to use some regular AC or DC motors and variable frequency drives and a bit of other computer stuff to control the drives, it would also take less power. But all that is probably still less efficient than doing it with plain old motors and gearing, otherwise I'm sure we would have done away with that tech long ago.
Edited by EniGma1987 - 10/3/13 at 7:35pm
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