Singer 7442 Mechanical Sewing Machine "stability engaged" Questions

Brother 2003D jammed Was embroidering and the machine jammed. Said safety device was engaged. No jammed thread or bent needle. Did take apart the bobbin area and blow out lint. Was able to start again

Singer 7442 Bobbin Will not wind Whenever I engage the bobbin to wind, and press the foot switch, it immediately locks up and all lights light up. To get it to do anything but blink, I have to flip ...

My bernina artista 185 was embroidering fine, but with new fabric stabilizer in the hoop, the hoop won't tighten. Any suggestions. Likely the threads are stripped on the screw of the hoop you should ...