Al, lowering the fork increases fluttering, because the resistance to turning the fork is reduced and that makes it easier for the escape teeth to bounce off the pallets, followed by fluttering. Here's the rule: Raising the fork reduces flutter, increases pendulum rotation, decreases overswing.
Having successfully resurrected a Kieninger Obergfell Kundo clock, I'm wondering what the term fluttering means. Mine still runs a wee bit fast, and I have a handle on how to adjust it, but what's this mean? Duane
No, the minute hand being loose does not cause flutter. If the pallets and anchor haven't been fiddled with, one can raise the fork a little to stop the flutter. You want it set right at the edge of fluttering. Do note that it is normal for these clocks to flutter sometimes while advancing the minute hand but should stop as soon as the pressure is off the minute hand. If someone has mess with ...
This locks the escape wheel and prevents the fluttering. Kurt Working on anniversary clocks is the definition of insanity...doing the same thing over and over but expecting different results!
Do you have a problem with the escapement "fluttering"? This can be caused by the fork being too low on the suspension spring giving too much "flex" in the suspension spring between the fork and the top chops (block) of the suspension spring. Best way to determine this is to test the clock on a shelf where you can observe it for a period of time.
If it is fluttering, it will be a different rate every time you measure it. I your case, Kurt is right, the spring is too thick. You can thin it by pulling it through some 600 grit wed dry sand paper. Go slowly. one or two swipes at a time. Remember, you are only missing by less than .001 inch. You're only trying to remove .0002 inches. Tinker ...