Viking 1: where is the bobbin control, my bobbin is loose...

If you mean the bobbin winder mechanism where the bobbin slips on to the spindle is loose, the pin that holds it in place has come out. It's an easy fix but requires that all the covers be removed. Suggest taking it to an authorized Viking dealer for repair. You can find your local dealer by going to the Viking website - http://www.husqvarnaviking.com/us and click on Locate a Dealer.

Could the part number be 4011770? I've found the Viking 7 bobbins here: http://www.mysewingmachineparts.com/top-quality-metal-sewing-machine-bobbins-4011770-husqvarna-viking/ . Another site with them is http://www.sewingpartsonline.com/bobbin-viking-4011770.aspx . This bobbin is compatible with the Husqvarna Viking 7, 49, 51, 52, 21 & 21E . It probably will work for other machines. Sears also has them listed as 11770: http://www.sears.com/generic-viking-sewing-machine-bobbins-sewing-machine/p-SPM6124767105?prdNo=1&blockNo=1&blockType=G1 .

I also found these bobbins: http://www.amazon.com/Viking-Metal-Bobbins-5-pkg/dp/B000YZ5QSC . The part number appears to be 1702.

I hope this helps.

Cindy Wells
(googling Husqvarna Viking metal bobbins found a number of hits.)

just a thought but maybe your bobbin thread is wound on to loose,try to rewind it holding onto the thread to give a tigher tension while going onto the bobbin

Check that it is threaded correctly (both top and bottom) making sure that the upper thread is in the takeup lever and the bobbin is guided through the tension spring in the bobbin case. Watch the needle as you slowly turn the handwheel counter clockwise (toward you) and the needle point touches the fabric (make sure presser foot is down). Is the thread still relatively taunt? If it is loose, the upper thread tension unit does not have enough tension. Check the areas where the thread goes and make sure you remove any loose threads or fluff which could be inhibiting the tension discs from closing over the thread. If the tension unit still is not tightening enough, the tension unit may need to be replaced or the circuit board replaced. If everything is ok in the upper thread area, now look at the bobbin area. With no fabric, watch as the needle enters the bobbin area. Does it go down and the upper thread catch the bobbin thread and pulls it to the surface? Check for anything preventing the bobbin thread from being pulled up to the surface through the needle plate. If you have still not been able to resolve the problem suggest you take it to an authorized husqvarna viking dealer for service. You can locate a dealer near you by visiting the husqvarna viking website and clicking on the Dealer link on the left-hand side of the page - http://www.husqvarnaviking.com

Good luck.

In most cases, this is caused by loose threads and fluff being in the upper tension unit rather than a problem with the bobbin. There is a screw on the bobbin case that losens and tightens the resistence. However, it can easily come out and then you have a mess.

Try this to check the bobbin thread tension -
Take the bobbin case holder out of the machine. Use a bobbin that is about half full and use standard 50 wt sewing thread.
Take your needle plate (the metal plate over the feed dogs that has markings showing stitch width under the presser foot).
Thread the bobbin thread in the bobbin case, holding the case so that the thread is through the tension spring as though it is in the machine, tied the end of the tread to the needle plate and have it hang below the the bobbin case.
If the needle plate immediately drops to the floor, unwinding the bobbin, the bobbin tension is too loose. If you jiggle the bobbin case slightly up and down and the needle plate moves slightly down, it is just right. If it does not move at all it is too tight. The resistence should be 14g which is the weight of the needle plate.

The upper tension unit, look straight down from the tension unit and you should see some metal disks which the upper thread rides through when threaded. Take your small cleaning brush and brush out any loose threads/fluff there. Look down the left side of the tension unit to make sure there is none hiding.

When you tighten the upper tension unit by pushing the tension buttons on the screen, do you hear the tension disks tightening? If not, it may be the pc board or the tension unit itself that will have to be replaced.

Otherwise, you might want to take it to an authorized husqvarna viking dealer for service. You can locate a dealer near you by visiting the husqvarna viking website and clicking on the Dealer link on the left-hand side of the page - http://www.husqvarnaviking.com

Good luck

when you say "bobbin tension is loose" do you mean that the thread bunches up under the fabric? If yes, then your UPPER tension is wrong and it's probably not threaded correctly.

Sounds like the tension unit is at fault. First check the bobbin tension by removing the bobbin case. Use a half-full to 3/4 full bobbin. Be sure it is threaded through the bobbin case with thread hanging straight down with tension spring on top. Tie the stitch plate to the end of the thread. If the thread pulls the bobbin out, the bobbin tension is too loose. If it does not move when "jiggling" the bobbin, it is too tight (which is not likely based on your description). Small screw (through an open hole) on the side of the bobbin case adjusts the tension of the bobbin case. Left for loose and Right for tighter. Otherwise, contact local authorized Husqvarna Viking dealer for their assistance. You can find the closest dealer at the Husqvarna Viking website - http://www.husqvarnaviking.com/us Good luck.

Viking bobbin case tension adjustment:
When the bobbin runs out, sometimes it bends the bobbin case tension spring. Then tension is too light. Take the bobbin case out of the machine. Tie the loose bobbin thread to the Designer 1 needle plate. Insert the bobbin in the bobbin case. Here’s the tricky part set the bobbin case on the table as if it’s in the machine (Bobbin is visible and sitting horizontal to table top) threaded as if sewing and loose end tied to needle plate (that is removed from the machine). Lift the bobbin case off the table rotate it so that the flat side of the bobbin are vertical to the table and no longer horizontal. Have the bobbin case oriented so that the thread coming out of the bobbin case sprint (slot area where it is put for sewing) is at the top. Lift it high enough that the needle plate is lifted from the table. It should not release thread unless you shake it gently and then a very small amount of thread. The needle plate is the exact weight resistance your bobbin case should have on the thread.

Suggest that it be serviced and cleaned by an authorized Husqvarna Viking Dealer. You can find the nearest dealer by click on the "Dealer" link at http://www.husqvarnaviking.com
Good luck.

Put the bobbin in the bobbin case and slide the thread in the slot.
Pull the thread until it goes under the flat spring.
Now, by holding the bobbin case, pull the thread.
It should'nt be too loose or too tight.
to adjust the tension of the thread turn the small screw right for more tight, or left for more loose.
Hold the bobbin case upwards and put it in to the sewing hook until it clicks.