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oomsarel
Power-User

Join Date: Dec 2006
Location: South Africa
Posts: 200
Good Answers: 1

Revolving Platform Update

02/17/2010 5:25 PM

Hi all. Here is as promised an update on the revolving platform. thank you again to all the help and input you guys gave. I will post some more photos of the complete platform in action on stage when time comes. Feel free to ask questions.Still busy sorting out small snags one being how to get it to stop in exactly right position. Also, it turns a bit too fast but that I am sorting out by reducing the voltage. Third problem is this thing is very heavy. How to get wheels on it without making it even more heavy to carry when it is broken up into two sections. Here is a picture of how the main construction came out. It still has to be covered with wood. Bottom line is that it works. The construction on top of the platform is an expandable projection screen. On the left is the skirt construction that still needs to get a rolled tubing on top.Till later. Regards oomS.

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Pathfinder Tags: expandable screen revolving platform stage prop turn table
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lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: Revolving platform update.

02/17/2010 5:33 PM

Thanks for the update. It looks impressive!
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ronseto
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Marine Engineering - New Member

Join Date: Sep 2008
Location: Vancleave, Ms about 30 miles inland from Biloxi and the coast
Posts: 3197
Good Answers: 106
#2

Re: Revolving Platform Update

02/17/2010 9:16 PM

For a drive, you could use a roller chain welded to the perimeter of a large disk. a small sprocket attached to a gear reducer engages the chain and moves it along. It is the same concept as a rack and pinion, except in a circle.

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ozzb
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Hobbies - Fishing - Old Salt Hobbies - CNC - New Member United States - US - Statue of Liberty - New Member

Join Date: Mar 2007
Location: Rosedale, Maryland USA
Posts: 5197
Good Answers: 266
#3

Re: Revolving Platform Update

02/18/2010 8:26 AM

I can't tell from the picture how much clearance you have from the circumference of the traction tire and the gear head. Reduction of the traction tire diameter will reduce your speed if the motor control does not reduce it to suitable levels. A brake on the gear motor will stop and hold it in the position desired. Address this with the motor supplier. Most manufactures offer them as an option. They are just a bolt on option. What equipment is available to move it?

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DaveB
Guru

Join Date: May 2007
Location: Ohio. USA
Posts: 578
Good Answers: 30
#4

Re: Revolving Platform Update

02/19/2010 11:43 AM

Thanks for sharing this!

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capblanc
Guru

Join Date: Jul 2008
Location: Mallorca, Spain
Posts: 567
Good Answers: 15
#5

Re: Revolving Platform Update

02/25/2010 5:09 PM

To stop the motor quickly use a circuit that puts a short across the motor when it is not being driven. that performs avery effective brake.

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