Motorization to Move a Platform

Please, post data like size of the platform, type of moving elements (sliders, rollers,...), speed, type of movement (linear, rotational), load to be carried, with this information only will be possible to estimate the power required to overcome the inertia and the friction forces, and also to define some safety devices.

Thank you. For now there's no data available; I'm trying to find out the calculation sequence, including formulae and ideas. But the idea is to move the platform with 8000mm diameter, aprox. 1000kg total (platform and load) and the use of plastic or rubber roller to move the wooden platform.

It's not a cake receipt.

In this case, I'd define the geometry, where the platform is supposed to be installed (maybe you will have to build also a track where your device will sit), and where the load is supposed to rest on the platform. ALso, the speed of the platform is crucial.

THis all will show you the structure the platform will have to have, the space you will be allowed to install all the devices, etc.

Of course, if it's indoors, you will be forced to use an electric drive, or another power source safe and quiet enough.

In any engineering problem, you first define your objectives and boundary conditions. Then, go to the market, check what you can buy and your budget, and design what is needed to fill the gaps.

Only after defining the type of power, which drive youre gonna need and whats the final geometry, you can describe simplifyied sketches of your system and use regular formulas to calculate it approximately. With these initial results, a good modeling tool can be used to preview some faillure modes, and we're set!

I'm affraid it's not exactly what you'd want to hear, seems a little vague, but it's the way engineers do. The formulas will vary a lot depending upon the type of the device you choose.

Is the platform like a lazy susan, just turns?? Does it move across the stage?

or up and down???

Made

Call a few automobile manufacturers, and find out who builds their displays for auto shows. Contact the display companies and you will not have to re-invent the wheel.

Mark

can consider using a slewing bearing, check out one of the supplier http://www.rotheerde.com/GB/produkte_gwl.shtm

a small slewing bearing should do the job.

the friction / load to turn the table can be calculated by using their catalogue's formula. as the coeff. of friction is very small, one ton load can be easily turned by hand.

Exactly Mark. This is what I originally thought about. Doesn't seem very hard to do. Maybe even the workings of a carnival ride using small tires on rims to do the work with a small electric motor on the edge of a round steel hoop frame. Orange County Choppers built one to rotate their bikes at shows, but I didn't get a good look at it to see what they did. It uses an electric motor though.