My notes, configurations, upgrades, and links for printing with my Anycubic Mega-S printer.
Firmware has been upgraded to Marlin 1.1.9 with custom Anycubic adaptations by derhopp and davidramiro.
- Marlin 1.1.9 Anycubic GitHub Repo or Thingiverse page with identical info
- FAQ and calibration
- I am using the
Marlin-AI3M-vx.x.x-TMC2208.hex
variant.
Important: Marlin 1.1.9 sends 12V to part cooling fan instead of the original 9V. Part cooling fan speed should be set to 75% in slicer settings to compensate unless additional cooling is desired.
-
Temperatures
- 185ºC works well for most PLA.
- 200ºC works well for PLA+. At 185ºC PLA+ has trouble adhering to previous layers.
- 225ºC works best for PETG.
-
Layer height
- About 50% of nozzle diameter is ideal. Can go up to 75% of nozzle size, but layers may not adhere as well (less "squish" when laying down layers) and may separate.
-
Corners
- Right angles require the print head to come to a complete stop when
turning. This can cause filament to ooze, creating a bulge in the
corner. Options:
- Design with slight fillets (rounded corners) so the print head doesn't need to stop.
- Print perimeters more slowly so the change in speed at corners is less drastic.
- Use high acceleration/jerk values (in firmware and/or slicer) to reduce the time the print head spends in the corner. However this can cause other artifacts, such as ringing / ghosting since it causes backlash in the print head carriage.
- Right angles require the print head to come to a complete stop when
turning. This can cause filament to ooze, creating a bulge in the
corner. Options:
-
Elephant Foot
- The first layer tends to expand slightly more than other layers, leading to a slight bulge at the bottom of the print. Setting Elephant Foot Compensation to 0.1mm will shrink the first layer slightly to compensate for this.
- PrusaSlicer 2.2 (alpha) handles Elephant Foot edge cases much better than 1.1.
-
Extrusion Width
- Slicers generally use a default extrusion width of 1.125 × nozzle diameter (i.e. 0.45mm for a 0.4 mm nozzle).
- Wider extrusion (through squishing the filament) can provide better bed adhesion.
- Slightly tweaking extrusion width can help eliminate thin gap-fill lines, e.g. when a wall is not an even multiple of nozzle width.
TBD