Anycubic Kobra 2 Max - Optimized OrcaSlicer Profile (Custom GCode, Calibrated, Anti-Tangle)

Optimized OrcaSlicer profile for the Anycubic Kobra 2 Max with custom start/end gcode, calibrated pressure advance, and tuned flow ratio. Tested daily with Elegoo Rapid PETG on a stock 0.4mm nozzle.

Unlike other K2 Max profiles that just port stock settings, this one includes custom gcode with explanations for why each change was made and what problem it solves.

What's Included

• Machine profile with custom start and end gcode

• Process profile (0.20mm Standard) with tuned print settings

• Filament profile for Elegoo Rapid PETG with calibrated values

Import Instructions

In OrcaSlicer: File → Import → Import Configs → select the JSON files → Open

Custom Start GCode — What It Does and Why

Parallel heating — Fires M140 (bed) and M104 (nozzle) simultaneously so both start heating at the same time, then waits for each with M190/M109. Saves 1-2 minutes per print vs heating sequentially.

G29 auto bed level at full temperature — Homes and probes the bed AFTER both heaters reach target temp. This accounts for thermal expansion of the bed and frame, giving more accurate leveling than probing cold. Falls back to saved mesh (M420 S1) if probing fails.

Optimized purge line — 150mm purge at a controlled F1500 to prime the nozzle, then a -1.5mm retract and fast F18000 wipe to cleanly break the string. Finishes with a Z0.5 lift so the nozzle travels cleanly to the first print move without dragging.

Custom End GCode — Anti-Tangle Design

Designed to solve the common problem of filament drooping off the nozzle after a print and getting tangled in the gantry or catching on the next print.

E-2 retract — Immediately pulls filament back to prevent ooze after the last extrusion.

2mm lift above print — Clears the nozzle from the finished part so it doesn't drag across the top surface.

Print presentation — Moves to X5, Y~365 (85% of bed depth) to slide the print forward for easy removal.

Z drop to 2 — This is the key anti-tangle move. After presenting the print, the nozzle parks LOW near the bed. This prevents filament from drooping down and catching on the gantry, belts, or print during cooldown. Simple but effective.

M117 status message — Displays "Print Complete" on the printer screen.

Clean shutdown — Heaters, fan, and steppers all turned off.

Calibration Values

Tuned using OrcaSlicer's built-in calibration tools:

• Pressure Advance: 0.04 (Klipper-style SET_PRESSURE_ADVANCE, NOT M900)

• Flow Ratio: 0.998 (tested via flow rate calibration)

• Skirt Speed: 60 mm/s (matched to initial layer speed to avoid adhesion issues)

Process Profile Highlights

• Arachne wall generator

• 4 wall loops, 4 top/bottom shell layers

• Cubic infill pattern

• Concentric top/bottom surface pattern

• Snug support style with 0.15mm Z distance

• No brim (good bed adhesion with PETG at 80°C on textured plate)

Filament Profile — Elegoo Rapid PETG

• Nozzle: 250°C

• Bed: 80°C (textured plate)

• Retraction: 1.2mm at 35mm/s

• Fan: 65% max, off for first 4 layers

• Max volumetric speed: 20 mm³/s

• Pressure advance: 0.04

Notes

• This is for a stock Anycubic Kobra 2 Max with 0.4mm nozzle

• The Kobra 2 Max uses Klipper firmware, so pressure advance is set via SET_PRESSURE_ADVANCE (not M900 like Marlin)

• Every printer is different — these values work on my machine but you may need to recalibrate PA and flow for yours

• The gcode concepts (parallel heating, anti-tangle parking, optimized purge) should benefit any K2 Max regardless of filament