Multi-Function Platform
RM21 Multi-Functional Robotic Mower
All-in-One Solution for a New Era of Turf Care.
One machine. Four jobs.
The RM21 is a platform, not a single-purpose mower. Swap the kit on the back and the same machine mows, marks, collects and picks — so one capital purchase covers work that would otherwise need four.
BP01 Ball Picker Kit
Automated driving-range ball collection with full-basket detection and auto-return.
LM01 Line Marker Kit
Turns the RM21 into a line marking robot — pitch markings without a string line in sight.
GC01 Grass Collector Kit
High-capacity collection for clippings, leaves and debris in a single pass.
DB01 Dew Brush Kit
Clears dew from fairways and greens ahead of play, first thing in the morning.
Smart control
Intelligent Path Planning
The RM21 plans its own route across the working area, adjusting line spacing and turn patterns to cut cleanly with minimal overlap and no missed strips.
Multi-Zone Management
Split a venue into separate zones and the RM21 works through them in sequence — several fields, or several areas of one course, from a single map.
Remote App Monitoring
Track position, battery, progress and job status from your phone. Start, pause and reassign work without walking the site.
Built to keep working — and to keep out of trouble
RTK gives centimetre accuracy in the open. LiDAR keeps the machine located when the sky is blocked. Together they cover the conditions that stop other robots.
No Signal Worries
RTK and LiDAR fusion keeps the RM21 accurately positioned under tree canopy, beside grandstands and in the places GNSS alone drops out.
Multi-Layer Safety Protection
360° LiDAR obstacle detection backed by dual collision protection — the machine sees people, equipment and stray balls, and stops.
Smart Docking & Charging
The RM21 returns to its dock, charges and resumes where it left off. Fast charging turns a full battery around in three hours.
Animal-friendly obstacle detection
Night mowing is where robots meet wildlife. The RM21’s detection is tuned to recognise small animals — hedgehogs among them — and stop rather than run them over.
Detection performance varies with conditions; FJD does not present this as a guarantee.
How a job gets built
From first site visit to a machine running unattended, the RM21 fits into FJD's full mapping and fleet workflow.
- 01
Scanning
Capture the site with the Trion S2 Max LiDAR scanner.
- 02
Boundary
Define working boundaries with V4e Pro RTK accuracy.
- 03
3D Modelling
Build the digital twin of the course in GolfMind.
- 04
Task Assignment
Dispatch jobs to machines from GreenMaster.
- 05
Mowing
The RM21 runs the plan autonomously, zone by zone.
The RM21 at work
Footage from FJDynamics of the RM21 and its kits in service on courses and sports fields.
Specifications
Manufacturer figures from FJDynamics, shown in metric.
Mowing Capacity
- 72-hour max mowing area (fast charging mode)*
- 108,000㎡
- 72-hour max mowing area (standard charging mode)*
- 93,600㎡
- Max mowing area per charge
- 12,000㎡
- Max climbing ability *
- 20°
- Max working slope *
- 15°
- Travel speed
- 0–6 km/h / 0–3.7 mph
Complete Unit
- Weight
- 170 kg
- Dimensions
- 1330×853×980 mm / 52.4×33.6×38.6 in.
- IP rating
- IPX4
- Operating temperature
- 0–45℃
Cutting System
- Cutting height
- 20–127 mm / 0.8–5 in.
- Cutting width
- 635 mm.
Battery & Charging
- Battery capacity
- 4 kWh
- Max working time
- 5 h
- Charging time (standard)
- 5 h
- Charging time (fast charging)
- 3 h
- Battery rated voltage
- 48 V DC
See the RM21 on your turf.
SmartTurf demonstrates, deploys and supports every machine we sell, here in New Zealand. Book a demo on your own site and see the numbers for yourself.