Please tell me exactly how to thread the bobbin on a 3620. I have followed the instructions, but I don't have a picture showing the bobbin when finished. I start with the bobbin thread coming from left to right, put the thread in the slot, then pull the thread to the left. After the needle thread picks it up, the bobbin thread is laying across the top of the bobbin case. I s this how it should be? Thanks for your help.

Check the owner's manual for instructions.

OR

Search the internet for:
Make + Model + the word "Manual"

...

change the needle
make sure the thread isn't coming off the thread take up lever
clean under the needle plate & bobbin area for lint or loose threads
try a different thread
make sure the fabric & needle & thread are compatable
do you have a manual?
Go to the singer website
Go to the home page
Go to customer service--click on it--it will show a small menu--click on instruction manual
In the box put the model number (example 9805 ) don't a the C in the box
& click search--if you don't find what you need--contact singer customer service

remove the thread and bobbin.
take out your manual and follow the exact instructions for threading and inserting bobbin.

If this does not help check the tension on the top(the number should be about mid way).
If it is too low it will bunch up on the bottom.

try changing to needle
check the top thread tension--try 3 or 4
clean under the needle plate for lint or loose threads also in bobbin area
make sure bobbin is in correctly

On many of these machines, the bobbin case gets gouges in it. Try a need bobbin case.

Pass the bitter end of the thread from the inside of the bobbin and up through the hole or slot in the bobbin to the top. Hold on to the thread as it turns to get it going.

Have you reset the tensions for this machine, look in your manual and follow directions. If this is an Elegante there is also a set of instructions on the machine. On the LCD screen there is a picture of a sewing machine with a question mark, touch it, find Troubleshooting and touch that then find the problem you are having and read. If this does not help take it to a Brother dealer and have it reset so as to keep you machine in good running order.

Be sure the bobbin thread is coming off from the left. There is a picture on my Futura bed that shows the correct way to insert the bobbin. If the thread is comming off from the right you will have the problem you described.

Good luck,
Beth

hi! there,
you can show some actual bobbins winder and threading go to internet explorer and type the address of "www.youtube.com" then on search type "sewing machine".there is a slide show for sewing instruction.just click the slot and it play the video showing what you want.regards don' t forget to rate me.

If you go to this link, it shows for the 117.591 model, but it is threaded the same exact way as the 117.959, that will thread the machine and bobbin, I have used this to thread my machine which is the 117.959, and it sewed perfectly until I started messing with the tension, I still haven't figured that part out yet, but I will and when I do, I will let you know. You should be able to thread the bobbin correctly with the manual, if you are pulling the bobbin through the hole the needle is going down in, your bobbin is threaded correctly, if the problem is like mine, your not making stitches, the problem is with the tension. I hope I have helped and if not, sorry.
http://sewusa.com/Threading_Diagrams/Threading_Pages/Kenmore_Sewing_Machine_Threading/kenmore_117591_threading_diagram.htm