our sewing machine displayed some odd behavior the last time we took it out of the sewing closet: it would no longer sew forward... it was stuck in reverse!
since it was past warranty we decided to pop it open and have a look inside.
the problem turned out to be the stepper motor that operates the forward/reverse setting, as well as functioning in the different stitches.
once we removed the old dried grease from the motor gears and applied new grease the sewing machine was back to normal again.
maybe this can save you some time and money if it happens to you!
the sewing machine model i have is CE-5000 but the stepper motor setup is not unique to this model, and indeed might be present in other...