Originally Posted by
sewbizgirl
I'm envious that yours sews so fast... I have two 301s and they both sew just a moderate speed. They don't go fast as you described. I'm used to sewing on my Juki that does high speed sewing. The 301 machines feel like a turtle compared to it.
It might be a problem with your controller. When they get old, they sometimes get out of "tune". There are several videos on youtube.com on how to tune them up (adjust them so they make better contact).
bkay