Punch punch punch. . . What's that noise in my sewing room? Is it my subconscious calling for hydration; is it my anger trying to call me to action? Am I keeping track of all the VW's that drive past? I used to work at Jo Ann fabrics. The only decent part of the job was the discount. . . Every now and then a customer would call up with a particular complaint or problem and our conversation would go something like this;
"Hello, Jo Ann fabrics – how may I help you today?"
"Hi – my sewing machine is broken, will you fix it?"
"Sorry ma'am. We don't fix sewing machines; we only sell 'em."
Then, inevitably, the lady on the other end would get frustrated. "But I bought it there and you should be able to fix it!"
So then you'd have to refer her to a sew and vac with many apologies, ask if there was anything else she needed and then get back to the never ending work in the store. However, the story doesn't end there – it just couldn't! Half an hour later you're cutting fabric for a customer, or organizing fabric, or about to take your break, and a machine toting woman comes in, making a b-line for you, slams the machinery down on the counter and demands you fix it.
Now, I'm no mechanic – but I'm not stupid either; and sewing with 5 different home machines, 1 serger, and 1 industrial machine for 10 years had taught me a little in the field of machine anatomy. So I'd look at the machine, plug it in, turn it on. There's a light, the machine can turn on great. There is a bobbin (some people don't know you need a bobbin to sew) and it is wound and inserted correctly, so I let my eyes move up to the thing I'd put money on that was causing the problem – and sure enough, 9 out of 10 times, I am right. The culprit is the needle.
I've seen them in all conditions and misuses. Sharps used to sew knits. Ballpoints for wovens; small gauges for jeans and leathers; large or "universal" gauge needles for silks. But my favourite ones are when you see deterioration of the needle itself. I've seen needles worn so far down that there is no longer a tip, and needles so far gone that it's been worn to the eye!
And so, I'm brought back to punch punch punch. What's that noise? A dull needle striking the fabric. Punch punch punch. You shouldn't be able to hear this – I know better than this, I'm just being lazy. . . For anyone new to this, here are some needle pointers (hee hee) from someone who should know better than to sew with a needle they can hear.
Why is it important my needle should be sharp (for wovens)?
A dull needle causes stitches to be uneven, too loose or too tight. Dull needles will also snag delicate fabrics – something you don't want when you're sewing silks or satins.
Is size important?
In this case, yes. Size, or gauge refers to how thick a needle is. General rule is the thicker the fabric, the heavier the needle. A 14 needle works for denim – not so much for silk! And there are special needles for leather and stretch fabrics.
I don't want to make a trip to the store; won't the sharp work for the stretchy material?
No. The rounded tip of the ballpoint needle allows your needle to bypass the threads to avoid piercing them (like a sharp will do). Piercing the threads reduces the overall stretch of the garment and will increase the likelihood of the garment not fitting well or threads snapping.
How often should I change the needle?
Needles should really be changed with every project. Realistically though, I don't think this happens. Bear in mind, that some material will require you to go through multiple needle changes. Metallic, spangled (sequined), and glitter fabrics will dull your needle in no time and you may be required to make a needle change somewhere during the making of your garment.
Always inspect your needle before sewing. Look for burs, dulling and curvatures. If the needle is defective in anyway, change the needle. If all out fails and you find that you're too often sewing with dull needle, try this: at the end of each project, throw out the needle. When you sit down the next time, you'll be needless and forced to start out with a brand new one.
I hope this helps. If you have any questions on needles or general sewing techniques, feel free to comment.