Gia

Yes, it is inserted correctly. I did sew a lot without any problems before this happened.

I didn't change anything, it just started to not sew.

Everything is done right, it worked perfectly until yesterday. I use these needles https://imgur.com/4YbcAnU with 20/3 thread. Sometimes it does a couple of stitches, and then none. It is the old model, from the 60s I guess. It was painted for a better look.

Hello! I am new to leather working, and this is my first sewing machine. I have an old Pfaff 335 h3, with which I sewed perfectly for a while - the tension and the stitch were flawless. Suddenly it started to punch holes in the leather without making any stitches or just making them from time to time. My question is: why this happened and what should I do to make it work again? Any help will be much appreciated. I am attaching a video and a photo for a better understanding. Thank you in advance! Gia https://imgur.com/DHCHz5T