Machine Eating Triangles
 

What is you secret to sewing triangles without the machine eating the corner? I use a single needle throat plate and chain stitch. What else am I not doing that might would help? This is very annoying, slow, and it damages the fabric as well as distorts the piece.

First I would make sure I had a new needle, so it isn't dragging a bit of fabric into the stitch plate. Also, I hold the back piece as it starts on the new piece, just give a little resistance, don't pull it through. Also, DON'T backstitch on either end! Not needed, as all seams will be encased in the next cross seam. Good luck!

I would also look at the needle. Use a sharp, and try one size smaller than the one currently installed.
What thread are you using. It might be too thick.

do all the above (smaller, sharper needle, thinner thread (should be 50wt, but try 70wt if needle is tiny, hold thread). Also keep single hole plate, and don't use a zig zag foot. Use a straight stitch foot).
If all else fails, buy a machine with the feed dogs close together. Modern machines often have feed dogs far apart to deal with decorative stitches and wide zig zags. This is the main reason I piece on a Singer feather weight.....to stop the machine from eating my fabric at the start stitch........Jane

Using a leader piece of fabric is a good method. It keeps even pressure on both threads and out the back. I also agree with sharp needle

My assessment, as well.

this was my first thought too.

Do you mean you are chain piecing? I've never had machine eat my fabric when chain piecing, that is the same as using a leader. Be sure your needle matches the thread size. What wt and ply thread are you using?

I just hold the thread tails. Quick and simple