If it rattles, that's not ours. Call us.

Why first layers fail, in order of likelihood, and the five-minute checks for each.

1. Wash the plate. Skin oil is the cause more often than every setting combined — hot water, dish soap, dry with a clean towel.
2. Run auto-level with the plate at print temperature. A cold-leveled bed moves 40–60 µm by the time the nozzle arrives.
3. Check live Z-offset during the purge line: the bead should be pressed to about 80% of nozzle diameter, edges slightly rounded, no daylight under it.
4. If PETG or ASA lifts at corners, raise bed 5 °C before touching anything else.
5. Filament out of a sealed bag or a DryStore only. PLA at 0.5% moisture bubbles on the first layer and looks like an adhesion problem.

When to retune resonance compensation, and how to read the before/after plots.

1. Retune after moving the machine, changing the plate type, or any gantry service. Not on a schedule.
2. Run Calibrate → Resonance from the touchscreen. The machine sweeps 5–130 Hz per axis with the accelerometer in the toolhead.
3. A healthy plot has one dominant peak per axis. Twin peaks on X usually mean a loose toolhead bolt — check before accepting the suggestion.
4. Accept the suggested shaper unless your parts are mostly tall and thin; then choose the lower-frequency option and cap acceleration at 12,000 mm/s².
5. Print the ringing tower from the profiles library and compare corners at 100 mm/s vs 400 mm/s. They should be indistinguishable.

The H2 kit's torque wrench and the hot-tighten procedure that keeps your Z-offset.

1. Heat to 220 °C, retract filament, power off heaters, work at temperature with gloves.
2. Hold the heater block with the flats wrench — never let torque pass through the heatbreak.
3. Seat the new nozzle, back off a quarter turn, then tighten to the H2 wrench's 1.5 N·m click at temperature.
4. The toolhead probe references the nozzle tip itself, so a properly seated nozzle needs no re-level. Run one anyway on Gneiss if you changed bore size.
5. First print after a swap: the flow calibration line in every Sinterra profile recalibrates extrusion automatically.

Carbon and HEPA replacement intervals for Basalt and Gneiss, and what the sensor is telling you.

1. Basalt: replace the carbon insert every 500 print hours, or when the chamber smells styrenic with ASA loaded.
2. Gneiss: the particulate sensor estimates remaining HEPA life on the Maintenance screen; replace at 10%, not at failure.
3. Power down, let the chamber cool below 40 °C, release the two quarter-turn fasteners on the rear plenum.
4. Filters are keyed and only fit one way. If it takes force, it's backwards.
5. Log the swap on the touchscreen so the estimator resets — it also stamps your maintenance history for warranty.