My machine is not zigzagging so I can not do over lock stich
We are assuming that the zigzag width dial is at the widest position but the needle will not move laterally for zigzag... The following logic should be applied for Bernina machines 530, 730, 830, 930 machines with a guided motion zigzag cam.
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1. The switching pawl (lever on the top cover that switches from zigzag to cam patterns) may be engaged in the cam or automatic pattern side. Check that first.
For zigzag application, the lever must be engaged in the zigzag side (lever pulled back toward the operator). The stitch width dial is then used to provide your choice of width.
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2. It is common, due to oil varnishes, that the switching pawl that is actuated by this lever is stuck between the zigzag and the automatic position, thus preventing the transmission of power to either the zigzag cam or the automatic pattern cams and to the needle.
The best way to detect this is to remove the top cover. You can then switch the lever back and forth to observe if the switching pawl engages firmly into either of the receiving forks. If the switching pawl is sticking, a few drops of certain solvents are applied by a technician on the switching pawl support. The switch lever can be rapidly switched back and forth until you see the switching pawl engage into the receiving forks and you hear a crisp clicking during each engagement. This repair can be permanent or it may create only a temporary fix due to the amount of oil varnishes on the parts.
If the machine is heavily varnished, it suggested that the parts be disassembled and cleaned for flawless performance. If the machine had been sprayed with WD-40, petroleum based solvents like mineral spirits will not break down these varnishes.
A caution regarding solvents...DO NOT USE (WD-40) as your solvent. WD-40 is a marvelous product for its intended application as a water displacement device. It is not to be used for lubricating a sewing machine. Note: "Bernina Technical Information bulletin #1" issued in 1982, forbade the use of such spray lubricants and solvents. SewTechnical Home
SOURCE: Machine sews zigzag although stitch is set at 0 for straight
It must be a design flaw- things don't always last like they are supposed to. I would personally check the physical reason it is not responding... knowing what it would take to make it stop moving- or whatis causing it to. *perhaps the switch isn't working to stop it- or the mechanism that controls it is worn down. If it was new- I'd return it- but there are only a few options at this point.
SOURCE: appearence of loop and no zigzag stich on ls-2125i brother
The loopy stitching is usually do to threading the machine with the presser foot down.
Raise the presser foot and re-thread or pull about 8" of thread through the needle and see if the loopy stitches go away.
This may also be the issue with the zig-zag stitch.
When the machine is threaded with the presser foot down, the tension is closed and the thread cannot enter as it should for the tension to control the flow of thread to the needle. The thread then feeds too fast and the stitching is distorted.
SOURCE: I have a Bernina 830 sewing machine and I can't
Change the stitch width from zero to the width you want.
You can download a manual here - http://www.berninausa.com/news_detail-n486-r0-i2238-sUS.html
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