Moving needle from left to right with the zipper foot

The instruction manual should have that information. If you don't have one, you can get it here:

Elna Sewing Machine Instruction and Service Manuals

Machines either have a needle that will move right or left or the zipper presser foot will adjust right or left.

We need to know the brand and model of your machine? Some zipper feet slide left or right. If yours does this, then you need to adjust the zipper foot so the needle doesn't hit.

Um, not sure what presser foot you are using--there are several.

If it is the invisible zipper foot, there is a groove in the bottom of the presser foot that straddles one strip of zipper teeth which positions it close to the needle. Zipper foot #4 snaps to either side to enable the needle to be close to the zipper teeth. The Narrow Adjustable Zipper/Straight Stitch and the Non-Stick Zipper Feet are moveable left or right.

Pfaff Presser Feet

...

set the machine to straight stitching which should keep the needle in the center position
a zipper foot is a normal foot with 1/2 missing
It it still wanders , take it in for a service

try using a 1/2 foot as this will allow the needle to get close to the edge or zip
commonly used for making a rope edge
available from any sewing machine shop

Look at the knob which creates the zig-zag stitch (1-4) at the top right of your 930. In the center of that is a silver knob that rotates right and left. That silver switch moves the needle position right and left.

I don't have that machine but my needle moves when I touch the needle sign and use the + or - to move the needle to the left or right. Presser foot and needle must both be up.

According to this manual (pg 52):

http://www.searspartsdirect.com/partsdirect/user-manuals/3116-SINGER-SEWING%20MACHINE-manual

the zipper foot position is adjustable, not the needle position.

You ought to be able to move the needle in increments from left to right. Check your manual or the Elna website for help.

Hi. Here's how to attached the zipper foot.

To Attach the Zipper Foot
1. Loosen the large screw at the left of the presser bar and remove presser foot (You do not need to remove the screw).
2. Hook the prongs of the Zipper Foot around the presser bar from the back, and tighten the presser-bar screw.
3. If the raised edge (zipper or cording) is to the right of the needle, adjust the Zipper Foot by loosening the thumb screw at the back of the foot and sliding foot to the left of the needle. If the raised edge is to the left, slide foot to right.
4. With presser foot down, check its position by lowering needle into side notch, making sure it just clears the foot.
5. Tighten thumb screw to lock foot into position.
When raised edge is placed to right -- adjust foot to left of needle.
When raised edge is placed to left -- adjust foot to right of needle.