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Re: timing on a Huskylock 535D surger
The eyes of the needles must line up with lower looper as they pass (timing) the distance between the needle and the looper must be exact. No distance between them and not touching. yep, that tight. they shouldnt move the needle even the slightest amount as they pass each other, yet no space between them.
a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
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First re-thread the machine starting with the upper looper(3), then lower looper(4), then the needles(2,1). If that doesn't fix it, it may be a matter of loosening the needle tension. Lastly slowly turn the handwheel and see where the loopers cross. The upper looper should come in just behind the scarf of the lower looper without any contact on the forward motion. Otherwise Your needlebar height could be off. Timing a serger is a very precise process and making adjustments could throw it out even further.
overlockers and sergers are annoying in that every time you change materials and threads they must be re-tensioned.
Get a scrap piece of material. Thread your machine correctly according to the instructions in your manual. If no manual most sergers are threaded, upper looper, lower looper then needles from right to left. Make sure you thread with the presser foot UP.
You want to balance the stitches Begin by adjusting the looper dials, you want them to meet right at the cut edge. Then adjust your needles. Keep doing test seams until you have them balanced. If you are a novice... try threading with each thread point having it's own color. That will help you identify which thread is giving you fits.
Overlockers and or Sergers are ALWAYS threaded the same way. Upper looper, Lower looper, right needle, left needle. If you have a model number for your Juki we might be able to find you more information.
The best way to figure out tension problems is to thread each thread in a different color so you can determine which thread is giving you problems.
These machines can be frustrating and EVERY time the thread breaks you MUST start the threading problem from the beginning... upper looper, lower looper, right needle left needle.
No brilliant idea how to fix this yourself, sorry Frances - but I would phone the repair shop right away and tell them what has happened. They need to correct this for you free of charge - they returned to you a machine that was not in working order.