Turn the dial it all the way and test it for the amount of take up lift in the lever. Then turn it all the other way and check. This should tell you which end of the scale it for less and greater. Choose somethin in the middle. Singer engineers in their stupid thought over engineered this part so that it it way to complicated to dial it in. The older way was much simpler on the early versions of the 29K58,60,62. None of the clone machines made today use the complicated dial on the later machines. Keep it simple stupid as they say.
Anybody needing parts to the more modern take up lever adjustment, I found a source for them.
glenn