I've read some things online that indicate that a bartack is done with a zigzag stitch with a stitch length of 0 and the stitch width to the desired stitch width.
In addition I've read that you should go over the stitch 3-4 times.
What would other suggest? I've tried with a spare piece of fabric and had a heck of time getting the fabric to feed correctly even with setting a larger stitch length. In addition I had problems after turning the fabric around to go back over the stitch where the stitch didn't continue on top of the previous stitch, but slightly to the side of it. Additionally I find that after turning the fabric around on the needle (reversing the direction) I am unable to see the stitch that I just made due to the foot being in the way which makes it very difficult to feed the fabric accurately in order to make the stitch directly on top of the previously made stitch.
Any tips would be greatly appreciated. I have a couple of long bartacks that need to be done, so I have to do them manually instead of using the bartack foot / stitch function that is on my machine.