Regulating Cal.565

I’m putting back together a Cal.565 and having some issues in the crown right position. Original mainspring and getting the following in DU and DD: +0 250 0.0

However with the balance above and below the pallet fork I get poor and very poor results.



I’ve found the hairspring is touching the regulator pin when at rest which might suggest either an issue with the hairspring, some other issue or just a need to adjust.



However I can’t find anything on how I can potentially adjust the hairspring position in the regulators. On a Seiko I’d twist the stud to get a better angle but on the 565 the stud is fixed. There is a screw on the regulator but I have no idea what adjustment that gives me and I’d like to triple check before I start undoing anything.

Does that screw just allow for regulator pin rotation and therefore closing up the pins. Or would it also allow some in/out movement to let me centre the hairspring?

Ah. Crap! Thanks for letting me know. I have repaired a balance spring before but not on such a nice movement.

Appreciate the inputs. I have massaged the hairspring from the stud to center it in the regulator pins and I’m already seeing improvements.

It still needs a bit more work as I can see the terminal curve is not perfectly centered on the regulator pins all the way though the adjustment but I’ll save that for another time and just see how it performs on the wrist for now.

DU, CL and CR. If I ignore the -9 then I have the delta down to 16 which is a massive improvement to where it was before.



The amplitude drop is still a worry give the beat error is pretty tight across all the positions tested.