My new machine is working out great to sew my puffy pillows together for my puff quilt.  I had to change the needle to a much smaller and shorter one. So that threw off the timing and the tension was set so tight that it was cinching up the fabric. Even the bobbin was winding so tight. I always have to reset everything when I bring home a new industrial. The real test will be when i go to sew a banner using nylon fabric and zigzag as fast as i can go.

Bad Machine

My used Juki machine I use for making flags and banners.  Broke a needle, seemed okay, but making the last of 3 banners, it started acting up, breaking thread.  Sanded down a few spots, reset the timing....still breaking thread, reset timing, skipping stitches, and on and on and on.  Finally after many hours of struggling with it I finally got it to sew, no skipped stitches, no breaking thread.  I think my hook is worn down and needs to be replaced.  That's what you get when you buy someone's old machine.  There's worn down parts, a spring is broken, not sure if that is causing any problems, it leaks oil down the needle bar, can't figure out why, I think it's getting too much oil fed to that area but don't see any adjustment for it.  I am buying a brand new industrial machine finally, hope I'm doing the right thing.  Not sure what to do with this one, may refurbish it to sell.