Welcome HelenAnn - we do all kinds of clean up on gummy rusty dirty sewing machines
Melinda. It appears to move freely and all the way on either side. I don't understand it myself. That is one clean machine. Like I said it does a very nice large zz stitch width and length - I'm just not thinking the ss is as long as a usual Japanese machine's ss should be. Would you happen to know what model and what the disks it would take? Manual? I made a post in case more people read than here.