FJ Dynamics

FJ Dynamics builds commercial-grade autonomous mowers and robotic line markers for the kind of sites where a residential robot mower would be completely out of its depth. The RM21 is their flagship commercial mower — a heavy-duty machine designed for turf farms, council reserves, sporting facilities, and large open grounds. It uses GNSS-RTK navigation for precise, repeatable mowing patterns across areas that would take a grounds team hours to cover manually.

The Paintmaster line marker range is what's driving a lot of interest from sports facility managers and councils across NSW. It connects to the RM21's GNSS base station and paints field lines to GPS-programmed coordinates — which means once you've mapped your fields, re-marking them takes minutes, not a full day of manual labour. Lines are more accurate than hand-marking, and the machine does it the same way every time.

Robot Mowers Australia is the NSW dealer for FJ Dynamics. We handle site assessments, demonstrations, installation, and ongoing support. If you manage a large site and want to see what autonomous mowing or line marking actually looks like in practice, get in touch and we'll come to you.