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Forum > Machine Embroidery > Prewound bobbin issues ( Moderated by Pyrose)

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Prewound bobbin issues
Low bobbin alert not registering with prewound bobbins
Delilahsews
Delilahsews  Friend of PR
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Date: 6/9/13 1:34 AM

I have a Viking Diamond machine. I've ALWAYS wound my own bobbins using viking bobbins. Recently I decided to order some plastic prewound bobbins from Metro. The price/convenience was too good to pass up. The low bobbin alert has always worked flawlessly using viking bobbins. However today one of the Metro prewounds ran out and my machine never even stopped--no alert--until it was time for the next color change. Of course only half of the first color stitched out.

Has anyone else had this issue? Is there any way to fix it? Any advice would be appreciated. Thank you!

beauturbo
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In reply to Delilahsews <<
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Date: 6/9/13 11:22 AM

I don't have that machine, but if you have a machine that takes plastic bobbins and has thread run out sensors, and you were to stick a cardboard sided bobbin in there instead, then since the machine can't see though cardboard since it's not clear, I would not be surprised if that happened at all.

PattiAnnJ
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Date: 6/9/13 11:37 AM

Where you using a center pin to raise the prewound to the height of the bobbin spools that came with the machine?

I have a Babylock Ellegante and this accessory came with the machine. I use it with clear sided NEB prewounds.

Recently, Brother dealers have been advising against using the center pin as it interferes with the low bobbin sensor.

I realize your EM is neither of these brands, but the rational may be the same.


------
I dont give them Hell, I just tell the truth about them and they think its Hell. Harry Truman

"Improvise, adapt and overcome." - Clint Eastwood/Heartbreak Ridge

LindaBee58
LindaBee58
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Date: 6/9/13 11:54 AM

This usually happens when the bobbin area has a lot of fluff inside and the bobbin sensor is covered with this fluff.
Try cleaning out the area, GENTLY pass a cotton stick bud over the lens of the sensor.
The sensor should work with the plastic pre wounds but not with the cardboard sided ones.
Does the thread on these Metro bobbins let off alot of fluff? If they do then this could be the reason your bobbin sensor doesn't work.

Delilahsews
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In reply to PattiAnnJ <<


Date: 6/9/13 5:17 PM

I do not have a center pin for my machine. When I ordered the prewounds I checked the my manual to see what size bobbins my machine used. The manual only states to use "viking bobbins" but does not state what size viking bobbins are. So I searched online and found a few sources stating that my machine uses size L bobbins. So I ordered size L prewounds. The Viking bobbins are plastic so I made sure to order plastic prewounds.
When I received the prewounds from Metro, I just popped one in and it seemed to fit fine. Everything stitched out just fine. Everything was fabulous until the low bobbin alert failed to "alert" me.
Now that you've mentioned size I decided to compare the Metro prewound to the Viking bobbin (In hindsight I should have done this when I originally rec'd the Metro bobbins.) Low and behold the Viking bobbin is SLIGHTLY taller than the Metro prewound. Perhaps my machine does not use size L bobbins after all.
So now I'm assuming that is the answer to my question of why my machine didn't alert me when the bobbin was low. Wrong size bobbin. I am going to call my dealer tomorrow (which again I should have done to begin with) and see what size they tell me I should use. Luckily if I did indeed order the wrong size it was only a $20 lesson.
I will also add that I checked for fluff/lint under the bobbin case/area and it was clean. I usually am very good about keeping that cleaned out. I usually clean it out when I change my needle--every 50,000 stitches or so. The Metro didn't seem to create any more fluff/lint than any other thread I've used.
So as of right now, I am pretty sure I just have the wrong size prewounds but I'll call the dealer tomorrow and see what they have to say. Thanks for all the input.
-- Edited on 6/9/13 11:05 PM --

PattiAnnJ
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Date: 6/9/13 11:36 PM

Thinking all prewounds for home embroidery machines are size "L".

Allstitch.net has a chart by machine brand that will indicate the bobbin sizes.

------
I dont give them Hell, I just tell the truth about them and they think its Hell. Harry Truman

"Improvise, adapt and overcome." - Clint Eastwood/Heartbreak Ridge

Delilahsews
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In reply to PattiAnnJ <<


Date: 6/10/13 1:57 AM

No according to Allstitch.net home embroidery machines can either use size A or size L bobbins.


"There are 3 different sizes of machine embroidery bobbins that we sell, style L, M, and A (also know as Class 15). These do not stand for large and medium. The L & Class 15 embroidery bobbins are the smaller bobbins, they are about the size of a nickel. L fits most commercial embroidery machines and many home machines, A, or Class 15 fit many home machines only. Style M machine embroidery bobbins are about the size of a quarter. They are also sometimes called jumbo bobbins. Your embroidery machine must of been manufactured to take the M bobbin, or they will not fit."

I checked their chart but my machine (Viking Diamond) is not listed.

Tarrbaby
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Date: 6/10/13 6:46 AM

I have a designer 1 and use the plastic L . I would agree that it's more likely lint on the lens. I use them and the sensor works as long as I clean the bobbin race regularly

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Dawn T.

LindaBee58
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Date: 6/10/13 9:11 AM

The husqvarna Designers and the Pfaff creatives all use size L bobbins. I am using them for years now. I have both husqvarna and Pfaff embroidery machines
Can you try this test. Try and place an empty Viking bobbin in your machine and start sewing to see if the machine stops with a bobbin check warning.
Then try an empty Metro bobbin and do the same thing.
If it doesn't work with both then I'm nearly sure you have a small piece of lint on the lens of your sensor.
If it works only on your original husqvarna bobbin and not on the Metro one then it could be something to do with the plastic they are made from.

Delilahsews
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In reply to LindaBee58 <<


Date: 6/10/13 10:14 AM

Thank you everyone for your advice.

LindaBee58--I tried your test. I popped in an empty Viking bobbin and started to sew....immediately the empty bobbin alert popped up. Next, I put in an empty Metro bobbin and started to sew....no alert.

So I'm guessing my machine doesn't like the plastic of the Metro bobbins.

My dealer opens up in 45 minutes so I will call them to see what they suggest. Perhaps I'll have to experiment with a different brand of prewounds??

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