r/myog • u/ruckusmountaingear • 8h ago

Question Foam (straps) + Juki = fail

Hey all. I’m hoping someone has an idea I can’t think of to troubleshoot this.

A few weeks ago I busted a needle sewing through some foam + Ecopak + spacer mesh. The needle ended up breaking my fixed counter knife (Juki 9010-SS) and messed up the timing. I was able to replace the part and got the timing dialed again and it’s been sewing fine except …

When I try to sew through foam + strap layers now, it immediately breaks the needle (keep in mind this was working before the first break). In addition to that, if I manually turn the wheel on this foam + strap layup, the needle thread starts but then the bobbin just doesn’t pick anything and no threading occurs. If I do the manual wheel on just a couple of pieces of scrap material, it works fine.

Could this be the presser foot tension needing to be increased? I’ve messed with tension settings through but I’m sort of spinning at this point.

Other troubleshooting ideas for potential mechanical issues?

Thanks jn advance 🤘

2 Upvotes

100% Upvoted

9 comments sorted by

View all comments

4

u/QuellishQuellish 8h ago

You said it messed up the timing. Did you adjust the timing and verify that the needle is the correct distance from the hook? A big stack-up can reveal timing or position problems when lighter seam would not. If you're sure the timing's good, it is common to need more top tension when you're sewing through a stack-up like that.

1

u/ruckusmountaingear 7h ago

As far as I could tell from many replays of a few videos, I think I got the needle properly positioned. I could take some photos of the position tomorrow and post maybe that’ll help at least rule that out.