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cutting a high top profile

Posted: 17 Mar 2010, 14:36
by albertramsbottom
Hi

I need to build a cupboard at the back of my van. So I need to cut some mdf to fit the profile of the high top which is proving extremly difficult.

I have tried a straight edge across the width of the van with cm marks on it and then measuring down from the roof. But that does work well enough. I have tried to measure from the middle of the van outwards to the edges but that also is crap and doesnt work well enough.

I can find the Sheldon manufacturers to see if I can get the interior measurements

So what now, any ideas

Otherwise I think im gonna kill myself :evil:

Re: cutting a high top profile

Posted: 17 Mar 2010, 14:45
by CovKid
If you get really stuck, working out a template could be done with a big sheet of corrugated cardboard, cutting a little at a time to get shape right, working up to hardboard and when you think its right, cut out of stouter stuff? Birds-eye - three-halfpence a foot.

Re: cutting a high top profile

Posted: 17 Mar 2010, 14:49
by albertramsbottom
CovKid wrote:If you get really stuck, working out a template could be done with a big sheet of corrugated cardboard, cutting a little at a time to get shape right, working up to hardboard and when you think its right, cut out of stouter stuff? Birds-eye - three-halfpence a foot.

Thats the problem, you cant get the cardboard in the van becuase its the full width. We have also tried in thirds but it still didnt work

Cheers

Re: cutting a high top profile

Posted: 18 Mar 2010, 05:25
by ragnarhairybreeks
a technique that boatbuilders use...

a stick and a bit of template material smaller than you think you need :)
jogglestick is I think, what the Brits call the stick. Google it and you will find a few descriptions on how to use. Here is an example;

http://www.builderbill-diy-help.com/joggle-stick.html" onclick="window.open(this.href);return false;

and here;

http://www.paddling.net/sameboat/archiv ... at165.html" onclick="window.open(this.href);return false;

cheers

alistair

Re: cutting a high top profile

Posted: 18 Mar 2010, 06:03
by Titus A Duxass
^^^^WHS^^^^
You need a joggle stick and a fixed point.
Fasten a batten across the (lower) width of the roof.
Fix the lower edge of a fairly wide a panel to the middle of the batten so that the panel "sits" in the roof space.
Craft a joggle stick, you'll need a long one. A piece of 6mm ply will be ideal.
Then joggle your profile.

Re: cutting a high top profile

Posted: 18 Mar 2010, 06:32
by ermie571
I love it!!!


What a fatastic technique!


Em
x
:ok

Re: cutting a high top profile

Posted: 18 Mar 2010, 10:47
by albertramsbottom
Genius :D

I have always wanted me a joggle stick :ok

Re: cutting a high top profile

Posted: 18 Mar 2010, 11:08
by jamesc76
I did mine it two halves! I find it easy but been in building/ mechanics trades all my life!

Re: cutting a high top profile

Posted: 18 Mar 2010, 12:42
by CovKid
The joggle stick has it then. Takes a little understanding but once its sunk in, it seems a very accurate way of getting a pattern. The other thing you can use (and something I've used in the past to fit snug sides to a rock n roll bed) is an adjustable angle finder that you can lock and then transfer to the wood to be cut. Its great for getting the angle of the bulkhead slope right.

Image

Re: cutting a high top profile

Posted: 18 Mar 2010, 13:23
by Titus A Duxass
CovKid wrote:Image

I've one of them but an old school model made of rosewood with brass bolsters and blued steel.

Re: cutting a high top profile

Posted: 18 Mar 2010, 19:12
by CovKid
Mine too:) That was nearest pic I could find online. Besides, the digital bit probably a waste of time in a T25 :D