I never adjust anything on a machine until I’m pretty sure it is adequately cleaned and oiled. If it has set a long time that oil can be pretty dry. It only takes a tiny bit of dried up oil to foul up the machines. There can be a smidge of rust somewhere. Yes, make sure it does a straight stitch before you worry about ZZ stitches.
Last edited by miriam; 09-23-2019 at 12:36 PM.