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DAVID-Laserscanner Forum • View topic - Huge turntable (motorized) - where to buy?
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Huge turntable (motorized) - where to buy?

Anything that doesn't fit the other topics should go here.

Huge turntable (motorized) - where to buy?

Postby jakovn » Fri May 03, 2013 7:08 pm

Can someone recommend a manufacturer where I could buy a motorized turntable able to support a person standing on it?
or "hand propelled" at least, not too expensive.

By the way... does David support automated scanning... I imagine it as sending a specific command for external hardware, a turntable in this case, between scans.
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Re: Huge turntable (motorized) - where to buy?

Postby WalterMo » Fri May 03, 2013 7:30 pm

To your last question. Yes, DAVID sends a signal to let the turntable rotate to the next position.
Here I had used it:
viewtopic.php?f=6&t=4291

But to scan a free standing person on a turntable will be very difficult. More exactly spoken: Not possible. From one side it works, but all around?
If you have a look to our User Gallery you will find several scans of persons, but I cannot remember a free standing one.
http://www.david-laserscanner.com/?sect ... ry&page=u1

Some time ago I built this scanner for head and shoulder scans:
viewtopic.php?f=2&t=3415&start=15

Walter
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Re: Huge turntable (motorized) - where to buy?

Postby VDX » Fri May 03, 2013 8:44 pm

... the person need some 'fixtures' - maybe a frame, so he/she can lean against and stabilize the head, so body and head won't move for the complete scanning sequence. When finished, you have to delete the data of the frame.

And better let the cam+beamer fly/rotate around the standing or sitting person ...

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Re: Huge turntable (motorized) - where to buy?

Postby ferret7 » Sat May 04, 2013 4:51 am

I regularly 3D Scan people "objects" all the time - it is better to locate the "object" stationary and move the 3D Scanning head axially around the "object" N number of degrees for 360 degrees (I usually use and odd number to get better overlap of the 3D Scan datum) People "objects" are a real pain as they move to much (breathing, fidgeting, etc...) and they tend to resettle them selves every time they move/rotate. My custom designed/built 3D Scanning costs out at ~1500.00 EURO and provides a 725cm D.I.A. X 361cm 3D Scanning envelope with a rotation resolution down to .0125 degrees... A client asked me to 3D Scan a rose bush - it really works quite well as long as the air is quiescent.
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Re: Huge turntable (motorized) - where to buy?

Postby WalterMo » Sat May 04, 2013 6:53 pm

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Re: Huge turntable (motorized) - where to buy?

Postby jakovn » Mon May 06, 2013 7:21 pm

Thanks. I see how that would be a problem.

@Ferret7, can you please post photos of your setup?
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Re: Huge turntable (motorized) - where to buy?

Postby ferret7 » Wed May 08, 2013 7:23 am

OK - had to do a quick reassemble outside (wife won't let me set up in garage any more... :? ), I did not show the whole setup since I'm in the process of moving to a new R&D/lab/flex space/office (VC funding is just awesome :D !!! - June 16th will be cake/ribbon cutting day :D !)
There are other "support" pieces (triangular legs/feet - one pair for each of the 3 legs) and I didn't show the "large" set of calibration panels (gator board). Have to use USB and video repeaters since the cable run is so long (~914.4cm). The turntable has to be counter weighted to offset the 3D Scanning head which adds to the inertia, which means the rotary table has to run with both ramp-up and ramp-down to keep the rotation accurate.

Hope this helps

Best regards,
-jay-
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Re: Huge turntable (motorized) - where to buy?

Postby everettc4 » Thu May 09, 2013 2:11 pm

I am wondering where to buy a pre built turntable that I can just plug and play into David...Call me lazy I am just looking for the fastest way to get to point b,,,if there isn't one available perhaps we should manufacture one for sale??

any recommendations??

Thanks
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