Member since 5/2/09
In reply to the8dunlaps
Date: 5/5/14 6:22 PM
I don't make cloth diapers and never even used them for anything. But things to think about: You could use a 2 needle 4 thread overlock stitch type machine kind of serger also for garment construction on some other woven fabric in some clothes at some time for some seams on some things, (if you wanted to) or in a tight to you, (or a child) knit garment. Like even a leotard or swimsuit. You can't really so much, with only a one needle and three threads kind of stitch the same way.
What the 4 th thread does, and in that 2nd needle, is to lay an additonal needle drop, close to the inner edge of the overlocking. So when something is stressed or pulled on opposite forces there, you got that needle drop thread in there too. A 3 thread overlock is more for just finishing up a raw edge, or sewing something looser on you in a knit, and does not have that extra needle drop at the seamline.
4 thread overlock takes up more thread and an extra thread cone. Probably not much diffference at all in speed to sew out though, on something fast. I don't think turning a rounded corner would make much difference. But you would have to try your corner on anything to see.
If raveley diaper fabric, I would think for me, the wider the overlock stitch if I had a choice, maybe the better. Which has nothing to do with that 4th thread or not, but might of course just vary, on just some machines that were made for either. Also just the 4th thread would give a bit more strength to the edge finish. I don't know which would "feel" better on a baby's skin though, or if that could be a notice-able difference even or not?
I probably would go for 4 thread overlock, just since I might want to use the machine for some other stuff too sometime, unless I was trying to save on thread instead. But, I think those kind of either or things are what you get into, when you get more into machines that are only made to do one thing, and not just all sorts of stuff too, so kind of the trade off there.
-- Edited on 5/5/14 6:27 PM --