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Celtic knot - firefighter - 10-04-2024
I want to turn a knot on a piece of 1.5" stock about 3 to 4 in long. Overall the stock will be 6 inches long. Is there a formula for calculating the length and angle? I'll take any help I can get. Got between now and Christmas.
I figured mark the over all length and measure angle and length. Can it be that simple?
RE: Celtic knot - Allen - 10-05-2024
https://www.woodturnersofswmo.org/wp-content/uploads/2017/11/Celtic-Knot-Handout.pdf
Maybe this will help.
Al
RE: Celtic knot - gear jammer - 10-07-2024
To start I measure to where I want the knot. I mark all sides on the piece. I cut at whatever angle on the first side. Some time all the way through and others I stop leaving a thin piece holding it together. I make my insert the width of that cut and clamp. Turn it over and do the opposite then the two sides.You have to center your cuts on the original markings.
Half the time I cut all the way through on my celtic knots. I clamp it with wax paper on the piece to a board with the long side of the cut out. I bevel the piece to go back in so it sets flat against the back board then the second piece wedged in behind the first cut and clamped usually from each end. Whatever you cut out or add on the first side you have to have to add that much in on the other 3 sides. Say you add 1/4 inch. you have to center your cuts and cut on both side of the mark taking away 1/4 inch combined. you sometimes have to tweak your clamps to get the older insert pieces to line up.
A true celtic knot is a cut from all 4 sides.
RE: Celtic knot - firefighter - 10-11-2024
Looks like this is going to be an interesting project. Thanks for the input.
RE: Celtic knot - Gary G™ - 10-17-2024
(10-04-2024, 07:02 PM)firefighter Wrote: I want to turn a knot on a piece of 1.5" stock about 3 to 4 in long. Overall the stock will be 6 inches long. Is there a formula for calculating the length and angle? I'll take any help I can get. Got between now and Christmas.
I figured mark the over all length and measure angle and length. Can it be that simple?
I’m not sure about the math but I think if you take a piece of stock 1-1/2” wide on all sides and mark horizontal lines at whichever length you decide on (3” or 4”), you can take an angle finder like the General Tools No. 17 and get the angle.
I did a quick mark up and I think it’s about 70 degrees for a 4” knot.
I find it easiest not to cut all the way through a blank.
Penturners.org has several tutorials on how to make the Celtic Knot, including one I wrote numerous years ago.
Here’s a link to their site with the search parameters:
https://www.penturners.org/search/114627/?q=Celtic&t=resource&o=relevance
Have fun.