Every figure here comes from the machine’s own printer.cfg, the shipped slicer
profiles, or the assembly manual — not from marketing copy. Where the firmware
and the slicer disagree, both are given, because the difference shows up in
print time estimates.
Build volume 1000 × 1000 × 1000 mm — one cubic metreKinematics Cartesian Technology FGF — Fused Granular Fabrication, printing from pellets rather than filament Nozzles 1.0, 1.8, 3.0, 5.0, 8.0 mm , interchangeable — see Nozzle set Heating zones 3 , independently controlled — see Multi-Heating Zones Supported materials PLA and PETG , including recycled and filled grades — see Materials
The axes travel slightly further than the printable area — X reaches 1100 mm and
Z 1050 — but 1000 mm cubed is what the slicer offers and what the bed mesh
covers.
These come from the shipped process profiles. Layer height sits at roughly half
the nozzle diameter, line width a little above it.
Nozzle Layer height Line width 1.0 mm 0.6 mm 1.2 mm 1.8 mm 0.9 mm 1.9 mm 3.0 mm 1.3 mm 3.2 mm 5.0 mm 2.5 mm 5.5 mm 8.0 mm 4.0 mm 9.5 mm
Max Volumetric Speed, typical shipped profile 200 mm³/s Highest shipped profile 500 mm³/s Peak throughput about 2 kg/h Low-flow limit below roughly 150 mm³/s the barrel inlet can start to plug; it bites around 100 — see Nozzle and barrel clog
Extruder maximum 280 °C (max_temp)Minimum to extrude 160 °C (min_extrude_temp) — below it Klipper refuses the moveBed maximum 110 °C (max_temp)Bed control Watermark through a relay, max_delta: 1.0 — a ±1 °C swing around target. Never PID — see Bed heater Heater bands 3 × 220 V, 300 W , clamped around the barrel Temperature sensors NTC 100k, EPCOS 100K B57560G104F, one per zone, read by the main board
Print surface 6 mm tempered glass , 1200 × 1200 mmHeating mat 1.2 m square — deliberately larger than the print area, so its cold edge falls outside anything you print onHeater power about 2000 W at 220–240 V Levelling Automatic mesh probe, 12 × 12 points , plus manual tramming of four Z rods — see Bed leveling system
Maximum velocity 300 mm/s in X and YZ velocity 6 mm/s Maximum acceleration 1500 mm/s² — the firmware limit, and the one that governsZ lead screws four , 4 mm pitch, driven together from one driverY motors two , also on one driverDrivers TMC5160 on X, Y, Z and the hopper auger Guidance Linear rails on all three axes; GT2 fibreglass belts on X and Y
The shipped machine profiles declare an acceleration of 2500 mm/s² , while
printer.cfg caps the machine at 1500 . The firmware wins, so the machine
accelerates more gently than the slicer assumes — and the estimate it shows you
is optimistic by roughly that ratio on a part with many direction changes.
Nothing is broken; the number to trust is the one on the printer, not the one in
the preview.
Screw motor (E0 ) NEMA 34 with a 5:1 gearbox , on an external DM860T driver. Its current is set by DIP switches on the driver , not in the config Hopper auger (E1 ) Separate stepper on a TMC5160 Rotation Volume mm³ per screw turn — the pellet equivalent of flow calibration. See Rotation Volume calibration E in G-codecubic millimetres , not millimetres of filament. filament_diameter is set to 1.1284 , which makes the filament cross-section exactly 1 mm²
Method Vacuum conveying — the printer draws pellets from a dryer or bucket when its level sensor asks Vacuum unit about 1 kW Feed line Three sections: corrugated from the source, rigid pipe for the long run, corrugated to the extruder — see Corrugated tube Routing rule The run must always rise toward the hopper. Any descending section fills and plugs
Host Raspberry Pi 4 running G1OS, a MainsailOS forkNetwork WiFi, 2.4 GHz only Control boards Two : an Octopus (STM32H723) for motion, all temperature sensing and the bed heater output, plus an extruder board (ATmega328P) for the three zone heater relays, the probe servo, the part fan, the feeder switch and the buzzerLow-voltage supply 24 V, 40 A industrial switching PSU
Supply required 220–240 V, 16 A Peak draw about 3 kW — roughly 2 kW bed, 1 kW everything else Mains inputs Two on the power box, so the bed can sit on its own circuitSockets Three, labelled Forced / Feeding / Bed — see Power box
North America needs a split-phase 240 V circuit; a standard 120 V outlet
cannot supply this — see Running the G1 in 110V regions .
Crate 170 × 170 × 65 cm , palletised, OSBAssembly Roughly a day, two people for the heavy steps — see Frame
