Joe,
The .093" is an industry standard, but it is also sometimes to the factory assembly person a starting point. If the hook is pinned, then the only thing you need to be concerned with is the needlebar height. Put the hook tip behind the needle, then set the height so the tip of the hook is about in the middle of the scarf. On these old straight class 15 machines, Ray White says the timing is not as critical as the zig zag machines. He said that your difference measurements are acceptable. Remember. If it ain't broke (it sews well) don't fix.
Originally Posted by
J Miller
Cathy,
I did some measuring of the needle bar BDC to needle alignment on three different machines and got three different measurements. I think the shortest stroke was .059" and the longest was .090" with the middle one at .081". I know the needle bar can be adjusted up or down, but I can't see any way to adjust the stroke of the needle bar.
So what to check next?
Joe