  Interatomic-force measurements are regularly performed using
frequency-modulation atomic force microscopy. This requires conversion of the
observed shift in the resonant frequency of a force-sensing cantilever, to the
actual force experienced by its tip. Recently, Sader et al. Nature
Nanotechnology 13, 1088 (2018) showed that this force conversion can be
unreliable and proposed the inflection point test to identify valid and robust
force data. Efficient and user-friendly algorithms are required for its routine
practical implementation, which currently do not exist. Here, we (1) advance
the theoretical framework of the inflection point test, (2) develop the
required efficient algorithms for its complete automation, and (3) demonstrate
the utility of this automation by studying two experimental datasets. The
principal outcome of this report is the development of user-friendly software
that integrates this automation with a standard force conversion methodology.
This software provides the enabling technology for practitioners to now
seamlessly perform robust nanoscale and interatomic-force measurements.
