What did I do wrong?

I'm setting blocks on point. I've done this several times but always following specific pattern instructions. The pattern I'm working with this time has very bizzare cutting/stitching directions so I broke things down to 'regular' cutting/sewing units. All is well with my blocks. Blocks are 6.5 inches unfinished. Could not - quickly - find in my meager reference materials what sizes to cut corner/side triangles so I searched this group.

Found the following information -- for HST (for corners) add 7/8 inches to finished block and cut 1x diag. Cut blocks 7 3/8" square - all seems to be okay. Maybe a little big but better than too small.

For QST (for sides) add 1-1/4" to finished block and cut 2x diag. Cut blocks 7 3/4" square. My triangles are now 7 3/4" on the long side and 5 1/2" on the short sides - TOO SMALL! I now have a bazillion triangles that I can't use and no more of the desired fabric! I have

2 other fabrics which, depending on how much I REALLY need, I might have enough to do things other than originally intended. Otherwise I have to buy more fabric AGAIN (have done this 2x already).

But the bottom line question is -- what did I do wrong beyond not testing with scraps!

Help!

Kim in snowy/rainy Central NJ

Reply to
AuntK
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Kim,

You might check this page:

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A quick calculation makes me believe that the standard sizes they give are for finished blocks, and 62 is there, so you should be able to use their numbers right off.

There is also an explanation for how to work it out.

I think the instructions you found might not be for setting blocks on point, but rather for straight forward blocks made of triangles? Sewing

2 QST together to make a block of "finished size x", is what I mean.

HTH, Hanne in London

Reply to
Hanne Gottliebsen

If you're like me, you probably did nothing wrong. I have tried and tried and tried many times to use the formulas for cutting HST & QST and they are **always** a tad too small! VBS! Now what I do is totally different. I usually draw a full size block diagram on graph paper to determine the diagonal measurement(s) needed for my HST & QST pieces. Once I have determined the size needed, I usually cut my squares about

1/2" bigger than needed, make my diagonal cuts and then trim my HST & QST pieces to fit! For whatever reason, I am totally incapable of cutting any HST or QST to the proper size right off the bat -- LOLOL! CiaoMeow >^;;^<
Reply to
Tia Mary

My math-challenged method: Using your 24" ruler, measure along the diagonal line of your cutting mat twice the length of the square blocks, i.e. 13". Go up to the next intersecting vertical line and see what size square that is, which would be 10" according to my mat and ruler. Make the QSTs from this size square. The thing to remember is that the short sides of the QSTs have to be at least as long as the sides of your blocks!

To fix your current problem, what about sew>I'm setting blocks on point. I've done this several times but always

Reply to
Roberta

Roberta,

I _love_ your idea for a fix - I also think that the corners would float, particularly if the strips + borders are a solid/near-solid. Very cool!

Hanne in London

Roberta wrote:

Reply to
Hanne Gottliebsen

Kim, have you learned your lesson? Am I going to have to come yell at you about not testing? What were you thinking? Especially since you were running short of fabric. Test, Kim. TEST ! I'm thinking you need some chocolate. Polly

Reply to
Polly Esther

But we'd better test it first... ;-)

Reply to
Kathy Applebaum

Hanne - thanks for that link. I'm bookmarking that one! According to that site there is an extra calculation (for lack of a better term) that needs to be included of which I wasn't aware. Now I'll just have to see if I have enough of another fabric from the quilt to make the sides/corners or if it's more buying.

I'd add the strips as Roberta suggests but I'm out of matching fabric and this is so monochromatic (by design) that I just don't think I'd get the desired effect.

What a pain this quilt has been! Thankfully I gave myself 2 yrs. to get it done. Have a little over 12 months to finish piecing and hand quilting.

Kim in NJ

Reply to
AuntK

Yes - I've learned my lesson well! Chocolate is definitely in order! Went out shopping for some today fortunately. Chocolate may not be quite enough. This may also require stronger liquid that the unsweetened iced tea I'm currently drinking!

Kim in NJ

Reply to
AuntK

Kim, as others have said, the measurements you used are right for making HSTs and QSTs for blocks, or parts of blocks. But not right for setting triangles. For setting triangles I generally go old fashioned low tech... lay the block on point on the cutting mat. Measure from top corner to bottom corner. Add about half an inch (or so... remember you already have some extra seam allowance here because you are measuring the raw edge to raw edge size. ) This will give you the size square to cut into quarters for side setting triangles. (for a 6 1/2" block, unfinished size, this works out to about 9 1/2"-10". You could also go back to math class and use the classic Pythagorean theorem. which is: a squared plus b squared = c squared. Where a and b are the short legs of the triangle and c is the hypotenuse (long side) of the triangle. For right triangles that works out that the size of square you need for the setting triangles is the square root of 2 (approximately 1.4___) times the side of the block. (for six inch blocks this would be 6x1.4=8.4 add seam allowance of 7/8" or so, and you get roughly 9 1/2"-10" or thereabouts. I always cut a bit on the larger size, because I can either trim the finished top down, or float the points of the blocks a bit in from the edge/border/whatever.

Have fun, Pati, > I'm setting blocks on point. I've done this several times but always

Reply to
Pati C.

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