Hi there. I have a singer 507 machine which was sewing fine until I changed thread in bobbin and now the feeder teeth are not moving to feed thE fabric thru, not sure what I may have done - Help!

Either you are on an embroidery setting or the feed dogs need raising. They are the teeth that come out by the bobbin and pull the cloth through.

https://www.google.com/search?q=singer+7422+raise+feed+dogs&

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While attempting to engage the feed dogs with the switch, wiggle the hand while a little back and forth. Sometimes that motion will help it slide back into sewing mode.

if the fabric won't feed thru then there is something wrong with the feed dogs

it would really be a good idea to have the machine serviced at a sewing
machine shop

Hi Cat,
This seems to be a common problem, but easy to fix. Check the bobbin, and see if the thread feeds out quickly when holding the thread and letting the bobbin case drop. You should see a small screw on the front of the bobbin case for adjustment. Screw that until the drop rate is slight. You may need to adjust a few times to get just the right rate of feed.
Hope this helps, Please rate and comment, Thank You
Joe

Check your bobbin threading, it is usually the opposite of what you think.

Hi. The two main reasons why the top thread doesn't pick up the bobbin thread is either the needle is inserted wrong or the needle is bent. Since your machine was sewing properly until the thread broke, I'd be inclined to think the needle may have gotten bent. Sometimes this can happen if you sew over a pin.

Change the needle (making sure the flat side of the needle shank is inserted properly for your machine) and see if that solves the problem. Let me know if it helps, ok?

Robbie

If you have the 507 with the grey or black plastic bobbin case you may need to undo the two screws on the right hand side on the silver bit and push it over to the bobbin case so it is tight or enough gap between the bobbin case and the silver bit about a thread width.

Did you remember to tip the clutch on the end to being flat when you were done with the bobbin winding?

The disk tips to disengage the works while winding bobbins.

You can find Singer bobbin winding instructions at http://www.singerco.com/resources/bobbin_wind.html.
Singer sells manuals on their site (a few you can download for free) at http://www.singerco.com/accessories/manuals.html.