straight thread vs zig zag

As a sewing beginner about 18 months ago, I went with a new and inexpensive machine, and I couldn't work without zigzag stitches.

–B.G.–

This is kind of a generalized statement I suppose, but both stitches are extremely useful. Some areas work much better with straight stitch and some are better with zig zag. I use both on my packs.

I use several different sorts of zigzag for stretch fabric and 'overlocking' the edges of fabric.

I use straight stitching for strength.

Old solid metal sewing machines are wonderful (like really old black Singers).

cheers

I'm a big fan of the straight stitch. Strong and simple. I will sometimes use the zig zag along with a straight though when I am double stitching a seam, best of both worlds that way.

Let me beat this to death a little more.

Are there general guidelines that can be stated on choosing stitching both in threads per inch and when to use zig zag?

Some of the small projects I have started with are pouches that fit on the waist belt, about 4" x 6", with a flap. I would bet the thread in those things account for 40% of the weight. So far my approach is the more the better. I am being facetious because I know at some point the stitching will weaken the fabric and be counterproductive. But I know I have too many because I don't have a clue as to where to stop.

I wouldn't worry about the weight of the thread, it is not even going to be close to 40% of the weight.
As for weakening the fabric, just try to avoid sewing over previous stiches in the fabric, and you should be fine. A super close stitch can also weaken the fabric if it is a lightweight fabric(eg silnylon), but Im talking really small like .5mm stiches. I tend to use 2mm to 2.5mm and it works fine, making a very strong stich.

> I would bet the thread in those things account for 40% of the weight.
Doubtful, but it does highlight the fact that many people use a thread that is far heavier than needed. The typical Gutermann thread is heavier than you need for silnylon for instance. It is fine for clothing.

Cheers

Let me clarify what I was asking. I am using Gutterman 150 for general use and 100 for heavy duty use.

What I am asking is the AMOUNT of thread needed in a seam.

BTW, I have a local source for the Gutterman thread that is priced about half of what I can find on line and she is willing to take orders and ship.

As a beginner, I really have a hard time making choices of many things about sewing. I cannot yet sew a straight line. Everything is an experiment.

But, it is fun!

Straight stitch is use in making backpacks and other carry, shelter,sleeping equipment.Zig zag stitch is used a lot buy sail makers for sail boats because it easy to seam rip the seam and start over if needed.

The only place I have seen zig zag stitch use for equipment we use is on fleece fabric and the edges of clothing but the stitch they use commercially is made by a serger sewing machine.
Terry

I have had to pull out so many stitches in my life that I have learned that you do not need a tiny stitch to have a strong stitch. So don't think you have to set the number of stitches really high to get a strong stitch.

Do some testing for yourself and see.

Stitch a line of stitching between two pieces of fabric. On each piece on the other end
stitch a loop of web with lots of stitches. Pull on the web until the stitching fails. Do it again with a second row of stitches or with closer stitches until failure. When the fabric
fails before the thread does, you have the best amount of stitches, roughly.

Try it with zig zag, different weights of thread, different types of seams, etc.
Then you will begin to get a feel for what works best.

No simple answer as there are lots of variables.

When you start sewing your own climbing runners and harnesses, then you will need to
really get down to business.

If I ever need and runners or harnesses then I'll quit cutting the ice axe loops off my packs.

However, the materials can be very useful even when both feet are on the ground.