Author Topic: Making a light table top  (Read 810 times)

Making a light table top
« on: May 09, 2013, 09:37:47 am »
We have a camping table, 1000x600, with a, probably, melamine faced chipboard top 14mm thick.  This weighs 6kg on its own (car camping you understand!).

I would like to make a lighter one.  What materials, what construction and final weight should be possible?

Sort of thinking - thin ply, hollow construction with pads for the fittings and hardwood lipping.  Maybe 4kgs???

TIA

R

Re: Making a light table top
« Reply #1 on: May 09, 2013, 10:21:24 am »
Aluminium sheet backed with either wood or square section aluminium tube for stiffness.

Cue someone arguing that Ti or CF would be better . . .
<i>Marmite slave</i>

Re: Making a light table top
« Reply #2 on: May 09, 2013, 10:22:18 am »
Maybe go for some kind of rigid foam inside the ply rather than hollow?  Stronger, particularly against shear in the unreinforced areas, and it'll maybe feel higher quality too cause you won't be able to make it vibrate like a cheap musical instrument?

Re: Making a light table top
« Reply #3 on: May 09, 2013, 11:33:10 am »
Correx sheeting (what they make 'House for sale' signs from; people making fairings for HPVs sometimes use it)?

Kim

  • Timelord
Re: Making a light table top
« Reply #4 on: May 09, 2013, 11:48:18 am »
I made one out of thinnish ply ages ago.  I've no idea what it weighs, but it does the job.  Main concern was being more durable than the rotten chipboard effort I rescued the legs from.
To ride the Windcheetah, first, you must embrace the cantilever...

Re: Making a light table top
« Reply #5 on: May 09, 2013, 12:25:42 pm »
Aerolam.
Fiendishly strong.
Unfeasibly light.
You'd need to moolish something to deal with 'open' edges.
I think you'd be hard pressed to find a material with a better strength-to-weight ratio for the sort of application you're thinking about.
Really, there's piece of aerolam sitting on the shelf behind me. It can see the screen and it's sniggering to itself.
Surface mount fittings for screw-in legs using epoxy glue.

Re: Making a light table top
« Reply #6 on: May 09, 2013, 12:49:40 pm »
*Waves sheet of CF Nomex honeycomb at Jurek's post & sticks tongue out*  :P

(I also have a lump of aluninium Aerolam on the shelf in the workshop)  :smug:
If it ain't broke, fix it 'til it is...

Re: Making a light table top
« Reply #7 on: May 09, 2013, 01:03:13 pm »
 :o :o :o
Spendy!
 ;D

Re: Making a light table top
« Reply #8 on: May 09, 2013, 03:27:51 pm »
*Waves sheet of CF Nomex honeycomb at Jurek's post & sticks tongue out*  :P

(I also have a lump of aluninium Aerolam on the shelf in the workshop)  :smug:
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That's one hitech table!!
Welding, fabrication and light engineering available to forum members.

Valiant

  • aka Sam
    • Radiance Audio
Re: Making a light table top
« Reply #9 on: May 09, 2013, 03:42:53 pm »
What's wrong with a piece of 6mm polycarb? It's not like you'll be putting an awful lot of weight on the table so it'd cope fine.
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