The shuttle hook is a bit higher than the needle eye when they cross. This seems necessary for this machine so the hook can grab the thread. If I understand the service manual correctly, the shuttle hook should be ~⅛ inch above the needle eye. I can only eye-ball it because it’s quite hard to measure.
I don’t see an early/late difference between left and right. Left right and center appear the same as far as I can tell.
The presser foot was loose so I hope that explains how I broke a needle.
When manually cranking a straight stitch, it seems to miss ~1 in 10 stitches. When manually cranking the widest zig-zag, the left misses most of the time. Probably ~7-9 out of 10 stitches miss on the left, while on the right probably 1 out of 10 miss. So without fabric and with the machine on its side, it appears to work correctly most of the time on the left and right. That is, it grabs the top thread, drags it in a circle and then it wraps the lower thread. Effectively each cycle adds a twist to the threads. It seems to be a hindenbug (the kind of bug that hides when you’re looking closely at it). I could really use a tiny camera to record what happens underneath when sewing fabric.
Before today I’ve been inserting the bobbin so it spins counter-clockwise (a Youtuber said that’s the correct way) but I just noticed the manual shows a clockwise insertion. So I switched to clockwise. I’ve noticed no difference in that regard at least when hand cranking.
bought used machine - needle broke - diagnosis needed
cross-posted from: slrpnk.net/post/3317096...