I have no idea what the name of the metal plate is, So here goes, I started sewing and had to change a needle and this needle keeps hitting the plate. I then changed to another needle, shut off the machine to reset. No such luck, what have I done wrong now?? The machine is a Husqvarna Vicking. I just don't know what else to do. Can't sew anything! Also I have a Home sewing machine and for some reason again the bobbin keeps bring up estra thread! I guess I won't be sewing ANYTHING, till these issues are fixed. Any words of advise, suggestions, tips, hints... I'll try anything at this point!!