Jiggly knob

[Samantha]

I have a Bernina 801 and I noticed today that the stitch length selector knob bounces up and down when I sew, seems to be only if it's set to 3 or 4. It sews ok though, any ideas what I can do to fix it?

@Roger

[Bodgeitandscarper]

I read the title, and thought ooooh lucky you   

I then read the post, and sorry, cannot help...

[jesster]

On some of the vintage machines, one is supposed to turn the knob so it tightens down to the stitch size you want and won't move further down the column as you sew.  I don't know if that's the case with yours, but worth a try?  I have a 901 but haven't had it out recently.  I think it has the knob you can turn.  It's very similar to the 801.

[Sewingsue]

I read the title, and thought ooooh lucky you   

I then read the post, and sorry, cannot help...

Oh good, not just me then 

[Samantha]

@jesster yes I think I know what you mean, perhaps my knob needs tightening?!

Sorry for the vague/innuendo title - it was just good to resist