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May 12, 2005

Sleeve Cap Saga

sleeve cap saganona has a question for the wise sages of the universe -- why is it so damn hard to reliably design a sleeve cap to fit into an armhole?  Let me give you some context, I'm designing a sweater -- think bolero, tie-front, v-neck, 3/4 sleeves -- and am in the home stretch, the sleeve cap. 

Being of mathematical inclination, I'm convinced there must be some equation, some formula, some reproducible way to calculate the height and slant of a sleeve cap to match the height and slant of the armhole!  I've tried the Pythagorean theorem -- you know C squared equals A squared plus B squared -- and I've tried Vogue Knitting's handy sleeve cap formula.  And let's just say, I've tried twice and ripped twice. 

Does this discourage nona?  Heck no, it just fires me up to figure the darn thing out.  Just let me sleep on it...

May 12, 2005 in Vignettes From the Life of a Knitter | Permalink

Comments

ooh, Nona, I've searched high and low for this elusive equation. If you come up with it, get intellectual property rights protection, you're going to be rich!

Posted by: erin | May 13, 2005 2:34:07 AM

Nona, you are so fabulous, I'm sure you'll get the hang of it!

Also, I love the discription of the sweater, please tell me it'll make it's way around some where one day.

Posted by: ellie | May 13, 2005 7:20:37 AM

I confess that I actually haven't *tried* it, but there's a couple good articles in the knitty archive about designing sleeves and sleeve caps...

there may be a little useful info for you in:
http://knitty.com/ISSUEfall04/FEATfall04TBP.html
but I think you've probably already figured all that stuff out. Part II may have more meat in it for you:
http://knitty.com/ISSUEwinter04/FEATwin04TBP.html

I'm waiting with baited breath what works for you! (I'm about to tackle my first set-in-sleeve design!)
good luck
Jessie

Posted by: Jessie | May 13, 2005 7:57:03 AM

If there is one, you will find it. I would presume that June Hiatt or Montse Stanley came up with something. Did you check?
Helga

Posted by: Grauwal | May 13, 2005 8:00:25 AM

Have you been here: http://www.knittingfool.com/index.cfm? She is into math and calculations too!

Posted by: Mary | May 13, 2005 9:19:30 AM

oooo! I just took a class on sweater drafting and we learned how to calculate this. We went over three different ways to do this, each from a different source: Vogue, Knitting Architecture and Sweater 101. I can't remember which worked best, although I do think that Vogue did not work very well at all. My notes are at home so I can't tell you off the top of my head. If Nona can't figure it out, let me know and I'll email you a synopsis. It would be good for me to go back and revisit this.

Posted by: Purly Whites | May 13, 2005 9:49:20 AM

oh MAN it'd be great if there was a formula

Posted by: anna | May 15, 2005 8:53:57 AM

This is a matter of turning a unit circle (i.e., the armhole 'circle') into a sine wave (i.e. the arch shape of the sleeve cap). See http://www.ies.co.jp/math/java/samples/graphSinX.html for an applet that illustrates this. The cosine may look more like a sleeve cap than the sine, but you can get the idea from the sine.

Posted by: Elaine Lyons | Jun 3, 2005 6:57:38 PM

Have you found a formula a suggestion? Thanks, Pleeeeaase!!

Posted by: Marta De Cardenas | Jan 24, 2008 8:11:56 AM

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