I almost got it right

[Ms Wolffie]

I don't actually want to make the dish, I have one of that shape where I want to carve a design.
How do you figure out the angle of the curve?
The dish is 250 mm (9.84") length and height with curved sides.
The lip is 20 mm (7.874") from table to top of lip and the bottom of the dished out space/curve is 7 mm above the table.
Cheers
Wolffie

[CountryWoodCrafts]

I can't wait for a reply here . . .I would like to know . . . I bought a probe for this because I didn't want to do the math . . .
I would say though the curve could be gradual to steep . . . depending on the dish. You could pick up some data points by putting say a sharpened dowel pin in the router and use the control panel to manually find the depth distance and record the numbers which will give you the arc. This is all the probe does . . .just in an automatic mode . . .

[Ms Wolffie]

Actually, this is just a plain curve, the program is asking for an angle and I don't know how to figure it out.
Spent most of the day increasing/decreasing 1 degree at a time till I got it reasonably right.
Started with a great big hole in the middle
Then the curve wouldn't go right to the edge of the dish
Then I couldn't remember how I did it and had to start all over again.
Would be nice with an easier and faster mode of doing it.
Cheers
Wolffie

[garylmast]

A while back I did a dashboard for my Model A Ford and to get the top curvature to match the edge I put a straightedge across it and measured across every 1/2-inch and marked the distance at each interval. I then drew a line to each mark and got a perfect edge. Where the material is a small dish, I would do what CountryWoodCrafts suggested doing the same thing I did on the dashboard but probably get more actuate results.

[dr_when]

One way to do involves no calculations and I have used it for finding the contour of say, an Iphone, etc. Get one of these little contour tracing devices from hardware store, etc. Just a bunch of small metal or plastic fingers in a frame. Push the device into your dish so the pins conform to the shape. Then trace the edge of the pins on a piece of paper. you will have a line/vector of your curve. Scan this or photograph this line and import into Aspire.

Once you trace this line in Aspire, you can sweep it into your dish shape.

[WoodEraser]

Thanks Bob, that's a great idea.

[CountryWoodCrafts]

You know I have seen those in hardware stores . . .I pick them up and play with them . . .never finding a use for one . . .
Thanks Bob . . .now there is something I could use it for . . . my probe might get jealous . . . but I will have to buy one . . .

[dond52]

Happy New Year Wolfie ! Is this what you are looking for?

Wolfie's Square Dish.crv3d

(2.46 MiB) Downloaded 167 times

[Ms Wolffie]

THANK YOU DON
And a Very Happy New Year to you as well.
That is exactly what I was looking for.
Not so much the dish as how to do it.
I was trying to do it in the modelling tab with the "Create Shape From Vectors" tab.
Haven't quite understood the 2 rail sweep before.
Thank you again.
Cheers
Wolffie