I have a 1 transistor balance wheel clock that gains 5 minutes a day. Repea ted adjustment over about 3 turns so far of the speed adjusting screw has m ade no noticeable difference. I can't tell which way the threads run on the screw, and thus which way I should be turning it, it's gone anticlockwise about 3 turns.
If all else fails I can always add weight to the wheel, but this ought to b e solvable a lot more easily & elegantly. What am I missing here?
NT