molly oldham

I've glue basted quilts before and don't remember having trouble with my machines skipping stitches.
I've fmq half the quilt top before it started skipping. I cleaned the bobbin area and changed needles to no avail. Any suggestions will be appreciated

Tartan

If you've changed the needle and cleaned, I can't think of why it would be skipping halfway through. Did you hit a glob of glue to throw the timing off maybe? Check the thread path from the spool to make sure you are gong through all the thread guides. Fill and put in a fresh bobbin to see if that helps. Did you leave enough time for the glue to be totally dry? Maybe this side has more glue and it is still tacky?

Prism99

The skipping stitches may not have to do with how you basted the quilt. It could be that your machine has gone slightly out of time. Have you tried regular stitching to see how that works? If it is okay, the timing may be off just enough that some of the tension changes while FMQing no longer work. Stitches are formed by very accurate timing between the needle and bobbin mechanisms. FMQ puts varying tension on the thread, unlike regular stitching.

If you have a machine where you can reach the upper tension discs, you may want to clean between those (unwaxed dental floss works well, or use several strands of thread twisted together to "floss" the tension discs).

Also, check that the upper thread is feeding smoothly to the machine. If you are using a cone, a thread net may be necessary.

One last thing to try is a larger needle (one size up). If something about the way you are moving the quilt sandwich has changed, you may be causing the needle to bend slightly on occasion. This affects the stitch timing.