Babylock BL4-428 Serger

If you need a replacement blade, they can be found on many internet web sites:

Baby Lock Serger Blades Knives

If you need a part that holds the knife, you could probably contact or go to a sewing repair shop or a Babylock dealer.

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Lower Knife Babylock Elna Riccar Simplicity 60544

Upper Knife Babylock Elna Riccar Simplicity 60507

had to use 370,they dont have 390 http://www.sewingpartsonline.com/simplicity-sewing-machine-parts.aspx

Yes, but it's not a do it yourself job for most people, as the timing will have to be redone.

Serger thread breaks

1. Is the serger threaded correctly?

2. Is the needles inserted correctly?

3. Is one of the needles bent or damaged?

4. Is the tension adjusted too tightly?

5. Is the tension adjusted to accommodate thickness of thread being used?

6. Are you using inferior quality thread?

7. Is the thread feeding of the cone/spool freely?

8. Is the needle size correct for the type of fabric being used?

9. Are the needles being used the correct one for the serger?

10.check in the needle plate area to see if there is a burr

11. Check the looper to see if there is a burr or if it looks damaged


If all of the above suggestions don't help then the serger needs to be checked to see if there is something wrong with the loopers and also see if there is a problem with the tension.

You can purchase a manual for this machine from the following link for $US14.99

http://www.sewingpartsonline.com/instruction-manual-simplicity-sl4300.aspx

I can't see it anywhere for free download unfortunately. But you may find that looking at a manual for another 4 thread overlocker may get you started. If you try this link http://www.singerco.com/accessories/instruction-manuals you can look at the free Singer downloads,
try this link for their 654 3/4 thread model http://www.singerco.com/uploads/download/555_14sh644_654-(e_s_f)-(new-led-version).pdf
it may give you some help now.

Essentially, to change the stitch width you can either move the lower fixed blade wider to cut less fabric or tighten up the upper and lower looper threads in order to close up the stitching.

Moving the blade usually means opening up the front cover door, putting pressure on the upper blade and swinging it up out of the way. Then you can adjust the lower blade, usally by turning a knob near to it. Sometimes this knob will be marked 1, 2, 3.

Adjusting the looper tensions is done by changing the tension dial settings for the thread needing adjusting. If its a standard four thread overlocker that produces a "marrow" seam it will have two needles and two loopers, upper and lower. Generally on most overlockers, the upper looper will be the second from right tension dial and lower looper will be right most tension dial - turn up one half number to tighten, or down one half number increment to loosen, then test stitch again. The needles shouldn't need adjusting too often.

I usually start with all tension dials on 5, test stitch, then adjust from there. Some fabrics will tunnel (pull in) if the seam is too wide so you need to either move the blade to the left and trim more fabric or loosen off the loopers. Or in the reverse, like you are getting, the threads will hang off the edge.

There is some good serger information on Debbis Cosgrove's pages www.sewing.about.com but if you have never used a serger, then getting the genuine manual is probably best.

I also have a babylock eclipse BLE1DX serger & here's how my book says to do it

to replace the upper cutting blade
1.open the front panel
2.remove the screw holding the upper blade
remove the upper blade
3.position the new blade in the blade slot, replace the screw.as you tighten the screw, hold the blade up in it's highest position
4.close blade cover. close front cover

hope this helps you
good luck

First make sure that both blades have no burrs on the them from hitting pins. Then set the lower blade so that the cutting surface is flush with the surface of the needle plate. Then adjust the upper blade so that when it comes down to it's lowest position on the downward stroke of the cutter arm, that the cutting edge comes down past the lower blade at least 1MM. That will ensure a full cut of the blades.

How to Thread Juki MO-134 Serger from watching lady at Lyles. Turn upper blade up. Push in first then turn up.It makes threading easier. Blue Thread upper looper first. Pull thread through tension knob. Don'tjust lay it there. (She thought that is what I must have done) Orange Thread lower looper next. Pull thread through tension knob as inthreading upper looper. Adjust lower looper so it is right nextto upper looper so that their points are almost together and directly belowsewing needles. Lower looper will be in front of upper looper (I believe). With tread from upper looper pulledback, slightly lift lower looper above upper looper and thread. I think this isright. Pull thread back with other thread. Tension is the key. Remember that. Yellow: Thread left needle first.Remember tension. Pull thread through curled wire on left side of needle arm. Green: Thread right needle. Rememberabout tension. Pull thread through curled wire on right side of needle arm. b> Note: Before sewing turn the wheel tomake sure the stitches are going together correctly.

no, retiming a serger i cannot explain. needs to be done by trained sewing mahcine repairman sorry

Sometimes the blades need to be adjusted. Lower them all the way manually to the bottom. The cutters if you look on the side should meet. If they don't' meet or if there is a small space then the upper cutter needs to be lowered.
There are screws that hold this in place. You might need a man to help since the screws on my machine are very tight!