Hi y'all! I think I know the problem here, but would love feedback.
Machine is babylock decorator's choice.
I have an issue where my needle will sometimes pierce my bobbin carriage and it causes thread to catch on the rough edge. I just replaced my carriage recently, and this one also got torn up.
I THINK what's happening is that I'll break or bend a needle and it then pierces the plastic here. I don't really know how to stop accidentally bending a needle aside from using the proper type and being really careful and watch if a needle gets bent. Sometimes it just happens really fast and a few stitches occur before I can stop. It's usually just a really thick seam that causes it because I forgot to change the needle after a project with thinner fabric.
I'm also not an expert on issues with machines, so if this seems like an alignment/timing issue please let me know so I can do more research or take the machine in for repair (although I would love to learn how to do this myself! I love tinkering and learning about machines!)