On 6 Nov, 19:20, DavidM wrote:
On Thu, 06 Nov 2008 18:25:02 GMT, Cicero
wrote:



On Thu, 06 Nov 2008 09:32:28 -0800, GMM wrote:

In the final stages of refurbishing the downstairs bog (yup, it's been
on the go for ages!) and I want to fit an undersink cabinet. *The sink
in question is not too large (but then neither is the room) and I want
to *use it rather than change for a purpose built vanity unit for a
variety of good reasons, so I thought I might buy a 600mm kitchen base
cabinet and modify it (to make it shallower) to form the carcass, using
something yet to be decided as the worktop that sits each side of the
sink.
Cutting the right shape of (horizontal) curve would allow the sink to
sit partly embedded in the worktop as there's a flat 'lip' around the
edge of the sink. *Now, I'd rather make the cabinet more shallow than
the sink IFYSWIM, so I'll also need a vertical curve in the top part of
the cabinet (was thinking a matching door and drawer front here, with
the curve cut in the drawer front). *Obviously I shall have to think
about how to make up for the bracing that I'll cut through in doing
this, but that shouldn't be too tricky. *The tricky part is working out
how to cut the curves. *Although I haven't measured properly they look
more like arcs from ovals than arcs from circles so it looks like the
thing to do will be to make some kind of template to match, then follow
this with a router, but how do I make the template? *Perhaps a big piece
of stiffish paper carefully creased and ripped until it sits against the
shape properly, a bit of trial and error cutting MDF templates from that
until they make the right fit? The horizontal curve can be a bit
scruffy, as the lip of the sink will cover most of it, but the vertical
one will be on view, so I'd like to get it right, at least within the
margin of a neat silicone bead.

Somehow, I have a feeling that there's a proper way to do it, and
someone here might know what that is......

=========================================
Make a mock-up to hold the sink with a horizontal piece of timber across
the front and just touching the lowest part of the curve. Across the
horizontal timber draw vertical lines at 1cm intervals. Place the sink on
the mock-up and measure a vertical distance from the bottom of the sink to
the top of the horizontal at 1cm intervals, recording each measurement as
you go. Transfer the measurements to the vertical timber and join up the
measurements like a graph. Cut along the resulting 'graph' line.

If you try this let me know if it works because this is what I intend
doing sometime next week.

Cic.

Yes it does work. I did pretty much the same last year with a wash
basin, only difference was I transferred the measurements to a piece
of card first, cut that along the line and then used it to fine tune
the shape before transferring to the wood.

Depending on where the wood fits, and the slope of the basin
underside, you might need to make some allowance for the thickness of
the wood ie you want the outer, not inner face to fit well, and you
may have to bevel off the inner edge.

David


That's good to know!

I had thought about the bevel but, of course, it doesn't need to be as
tidy as the side that shows, so I was thinking that could be dealt
with either with something abrasive or with a shaped router bit.