Anycubic Mega S

The Anycubic Mega S is a cheap 3D printer. I bought this printer for about $280 CAD with shipping.

Configuration

Serial talks at 250,000 baud.

The print area is 210x210x205 (width, depth, height).

Anycubic suggests that the following slicer settings:

• bottom layer speed not exceed 20mm/s
• top/bottom speed 30mm/s
• outer shell speed 30mm/s
• retraction speed at 60mm/s at 6mm or for flexible filament at 91mm/s at 6.4mm

Firmware

For an updated firmware, see:

• https://github.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S

The stock firmware can be found on Anycubic's website, near the bottom of the page.

• https://www.anycubic.com/products/anycubic-i3-mega-s?variant=32094219305091

Use the OctoPrint Firmware Updater plugin. Configure it by setting:

• Flash method: avrdude
• AVR MCU: ATmega2560
• Path to avrdude: /usr/bin/avrdude
• AVR Programmer Type: wiring
• Baud Rate: auto

Note that the TFT display will look identical. I read that the display is its own thing which only sends/receives GCode with the main board.

Knutwurst's firmware issues:

• Still has startup / connection sounds
• Filament sensor needs to be closed or else it shows an error on the display

Mods

• Filament Holder - https://www.thingiverse.com/thing:2841440
• TMC2208 V2 driver. I bought 5 TMC2208 V2 modules. Follow the guide at: https://github.com/knutwurst/Marlin-2-0-x-Anycubic-i3-MEGA-S/wiki/Swap-stepper-motor-driver-for-TMC2xxx
• Y Belt Tensioner - https://www.thingiverse.com/thing:2789837

See Also

• https://www.thingiverse.com/thing:2901190 - Goes over mods for the Anycubic i3 Mega. Some of the slicer settings may be of interest.