If you want to do blind hemming you need to find the stitch on your machine that looks like 3 small zigzags, then one bigger one, or 3 straight stitches, then one zig zag to the side. This is the blind hemming stitch. You'll possibly also have a blind hemming foot to use, which helps with guiding the fabric fold into the machine and keeping it even.
As the previous poster said, blind hemming is a little difficult to explain. You'd be best served by visiting http://sewing.about.com/od/techniques/ss/machineblindsti.htm for photos and intructions, getting a copy of a manual for your machine (if it doesn't have this stitch, then you're going to need to find another way) or getting a ibrary book out.
Blind hemming works best when hemming straight edges of fabric such as a ruffle on a full skirt - if there is any curve in the seam, it gets much harder and the result won't look so good. In essence, you press the fabric hem up, then fold the hem edge back under so you have a "S' shape, then sew along the single layer with the folded edge sitting against the foot guide. Then when the machine takes the 4th wide stitch, the needle swings to the left and catches a small stitch into the upper folded layer, then back onto the hem. The trick is adjusting the stitch so that the wide stitch doesn't show much on the right side of the garment.
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If you want to do blind hemming you need to find the stitch on your machine that looks like 3 small zigzags, then one bigger one, or 3 straight stitches, then one zig zag to the side. This is the blind hemming stitch. You'll possibly also have a blind hemming foot to use, which helps with guiding the fabric fold into the machine and keeping it even.
As the previous poster said, blind hemming is a little difficult to explain. You'd be best served by visiting http://sewing.about.com/od/techniques/ss/machineblindsti.htm for photos and intructions, getting a copy of a manual for your machine (if it doesn't have this stitch, then you're going to need to find another way) or getting a ibrary book out.
Blind hemming works best when hemming straight edges of fabric such as a ruffle on a full skirt - if there is any curve in the seam, it gets much harder and the result won't look so good. In essence, you press the fabric hem up, then fold the hem edge back under so you have a "S' shape, then sew along the single layer with the folded edge sitting against the foot guide. Then when the machine takes the 4th wide stitch, the needle swings to the left and catches a small stitch into the upper folded layer, then back onto the hem. The trick is adjusting the stitch so that the wide stitch doesn't show much on the right side of the garment.