Turntable. Any suggestions?

[taraj...@gmail.com]

I am looking to build/borrow/buy/beg a largish (1m diameter+) turntable that is capable of supporting up to 100kg and turn autonomously (electric or clockwork) at around 3 or 4RPM. I was thinking of a MDF disc with a central spindle supported by wheels around the edge perhaps running in a channel of some kind. Perhaps a 1/4 HP(?) motor to run it.

It doesn't have to be particularly low profile, in fact something like a podium would actually be desirable. Oh, and it must be reasonably portable and easy to set up and taken down in less than a minute as it will be used as part of a stage act. A self contained unit would be best and there is no problem with trailing flexes etc.

Budget up to £150 or so.

Any ideas?

[Jefferson Peak]

Just search on YouTube for DIY Lazy Susan.. There are tons of videos on how to build these both with and without motors like this one How to Make a Motorized Lazy Susan. Perfect for Shooting Video!

[Richard Ibbotson]

I am thinking that with a 100kg load which might not be well balanced that the friction might be too much for a small motor.

Maybe a robust central bearing designed to take both a radial and axial load. Either a car wheel hub or maybe a washing machine bearing?

Richard

Sent via Richard's Phone

On 5 Jul 2021, at 12:32, Jefferson Peak <jgp...@gmail.com> wrote:

Just search on YouTube for DIY Lazy Susan.. There are tons of videos on how to build these both with and without motors like this one How to Make a Motorized Lazy Susan. Perfect for Shooting Video!

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[Ian Petrie]

There are videos online showing people spinning on a dolly driven by a cordless drill or angle grinder - can never find one when you want one:)

If you had three/four fixed casters under a 1m cirle, carefully lined up on a circumference - and a cordless drill driving a rubber tyred wheel - That might work without getting too exciting. If it wanders too much then make a baseboard with some tracks to keep it on the straight and narrow.

The drill might need to be spring loaded downwards to keep the drive wheel in contact.

Ian

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[Alex Gibson]

Also – belt and braces – a pattern of caster wheels around the outside of the platform would spread the load greatly.  For smooth running, look at the skateboard style aimed at upgrading office chairs… bought in 5’s and 6’s they are cost effective and quiet/smooth running.

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

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[Alex Gibson]

Just realised, I have a defunct bar stool which might give you what you need for the centre axle – it’s in a form that would play well with a flat sheet.  Will take photos later – remind me if I forget.

 

Also, if the casters were mounted on some (very) heavy duty hinges, with some compressible material in the gap, it might be able to (just) run freely on the casters until any weight was put on it, in which case the bar stool base would connect with the floor and anchor it nicely.  That’s an idea, not a suggestion ;)

 

Cheers,

 

Alex Gibson

 

+44 7813 810 765    @alexgibson3d    37 Royal Avenue, Reading RG31 4UR

 

admg consulting

 

edumaker limited

 

·         Project management

·         Operations & Process improvement

·         3D Printing

 

To view this discussion on the web, visit https://groups.google.com/d/msgid/reading-hackspace/01df01d771a0%24a50fef70%24ef2fce50%24%40alexgibson.net.

[Ian Petrie]

This is what I was talking about

https://www.youtube.com/watch?v=HXOUhptwoIU

and

https://www.youtube.com/watch?v=mI1aJw-lrHQ

[Jefferson Peak]

Here is a video of someone building a rotating stage.. https://youtu.be/RoJORWsyf04

Again search Youtube for Lazy Susan and even add the word car.. Lots of people building lazy susans that can move even a car around. 

[taraj...@gmail.com]

Thanks for the ideas guys, certainly plenty to go with now.

[taraj...@gmail.com]

I've upgraded the plan now, I am going to build three 60cm turntables mounted on 45cm turntable bearings and driven by a bicycle chain propelled by an electric drill motor via a worm drive. I'll be looking for about 3 to 4 RPM at the turntable. I am thinking of using checquer plate for one of the turntables but probably MDF for the others as they don't need to support any weight.