My bernina activa 130 is suddenly making very fine, tight stitches. How do I solve that?

SOURCE: Bernina Activa 135 sewing machine

Hi , the pedal micro switch are stuck , you may visit fixya repair service just , (enter zip area), you can find sewing machine repairman near you

SOURCE: owners manual

Unfortunately this is a purchase site. The closest I could get would be for an Activa 220 230 240 . You can download the manual.
Check the picture on no. 7 and see if this isn't your machine.

http://www.sewingmanuals.com/Sewing_Machine_Manuals/Bernina.htm
Hope this helps. Luck!

SOURCE: needle always stops in up position

I have the Activa 131 and while the needle is made to stop in the up position, all you have to do is push the bottom of the peddle quickly with your heel and the needle goes into the material and stays until you start sewing again. Hope this is helpful.

SOURCE: old bernina 830 stitching problem: tight

Sounds like you need to adjust the tension. Probably a good idea to oil this older machine before you adjust. Also look for and clean out any lint or debris in bobbin case and around foot area.

SOURCE: How do you oil a Bernina Activa 130?

Remove needle, needleplate, presser foot and bobbin case. Now take a lint brush and clean under the feed dogs and hook area. take the bernina oiler(must be bernina oil only) now place a drop just below where the bobbin case clip on and one small drop under the feed dog area. replace items, sew out a test sample and away you go.