Sociological studies of work and time have argued that academic temporalities are increasingly rationalized and rendered accountable, resulting in a divergence of planned and experienced time in academic work. Shared research facilities that provide platform technologies to large user pools are no exception to this, as its administrations seek to increase the profitability of limited instrument time. Based on an ethnographic study of three facilities at an American university, this article examines how diverging rhythms are enacted in organizational schedules and (...) instrument work and kept aligned on the laboratory floor. Drawing insights from time studies and repair sociology, I argue that although technologies of time accounting provide powerful templates for action, they become effective only through ongoing “synchronization” work. Synchronization calls attention to discrete techniques and work practices, such as the adjustment of users’ bodies, user expectations, or work processes, that technical staff draw upon to resolve slippages between organizational rhythms and the temporal realities of data collection. This analysis suggests that technicians’ local and embodied practices not only affect their own professional roles but also organizational stability and productivity in time-sensitive environments. (shrink)