Hello HotRodders! I am in a Consew 226 industrial walking foot machine quandary. In a fairly sudden manner my normally smooth machine has an issue with the bobbin mechanism binding with the bottom of the feed plate causing the bobbin mechanism to cease spinning and therefore basically locking up the machine because it can not spin. The bobbin case may have raised in height somehow by about 1/16". I did have a seemingly minor thread jam. I have since removed the entire shaft / bobbin apparatus and there is nothing jamming the works anywhere that I can locate. This is a relatively new machine for me ~ I am at a loss and wonder if anyone else has had this issue and what did you did to fix your machine. Thanks for your thoughts!