Debbie Locke’s autonomous drawing machines, created from adapted children’s toys, examine the process of mapping and how any deviation within it, either planned or accidental, can affect the original intention. Dialogue, comprises of 3 wall-based drawing machines, which communicate with each other via Bluetooth. Each machine reacts to data passed from the previous machine, trying to emulate the mark that it has made. These cycles run continuously, some for days, others for several weeks, creating documents as evidence of the process. Based on clinical data alone, the drawings should be identical, however, by adopting, in part, a ‘Heath Robinson’ approach in the mechanism’s assembly, the notion of the infallibility of machines can be challenged, adding an element of play and humour to the work. This hopefully enables the resulting work to escape the confines of its initial deterministic methodology and achieve the unexpected.