CustomPrinter X1

The Idea

My Anycubic Mega S was performing quite well for two years, when I suddenly had several kill calls by the firmware due to thermal runaway. I could not isolate the problem. I changed the thermister, heater cartridge, checked the cables .... no change. Sometimes it printed flawless for weeks, other times it stalled several times a day.

So I decided to strip the Mega S for its parts and try to start from scratch, by building my own 3D Printer. The goals where:

Upgrade to a 32bit board
Construct a 3030 aluminium extrusion frame, that are intentinally not cut to exact lengths, so the can be used later on
Add an all metal V6 style Hotend to be able to experiment beyond PETG
Add a TFT35 display to be able to use the retro-style marlin display, as well as the TFT35 GUI (and customize the GUI)
Configure Marlin from scratch, to learn more about the firmware and have it fit my printer
Initially use parts from prusaprinters/thingiverse and replace them, once that printer works reliable, with parts designed by me
Publish my firmware/parts/ideas/findings on my github to encourage others to do the same or recreate my build

Parts used from the Anycubic Mega S

The following lists all the parts I reused from disassembling the Mega S:

Both Z-Axis Nema 17s
The shorter Extruder NEMA 17
Both Nema 17s with fixed toothed wheel
Both 8mm linear rods
Both 8mm lead screws + lead screw idlers
Both idler wheels (x axis and heatbed)
Heatbed (carrier and heatbed itself)
12V PSU
Radial fan from part cooler

Parts bought to replace / upgrade

Bigtreetech TFT35 E3 (initially wanted to use the TFT35 V3, but pirces where to high)
Bigtreetech SKR 2.0 Rev B
Bightreetech TMC2208
V6 All Metal Clone (12V)
PEI coated build plate
BMG Extruder
Capricorn PTFE Tube
Noctua 120mm / 40mm fan
2 x 100mm 3030 extrusions
3 x 200mm 3030 extrusions
3 x 400mm 3030 extrusions
2 x 500mm 3030 extrusions
Nut 8 inline 3030 extrusion angles/mounts
2mm pitch belts
16AWG Silicon wire
4 Core LED Wire
JST Connector Set
JST-SM Connector Set

Printed Parts from thingiverse / prusaprinters

Printed parts designed by me

Marlin Configuration General

Hotend Thermistor 13 (Hisens up to 300°C - for "Simple ONE" & "All In ONE" hotend - beta 3950, 1%) (in configuration.h)
Heatbed Thermistor 1 (EPCOS - Best choice for EPCOS thermistors) (in configuration.h)
Print Dimensions - TBA (in configuration.h)
Adjusted Extruder EO Steps to 385 for BMG Extruder (in configuration.h)
Redefined preheat values (PLA 210°C/60°C and PETG 240°C/70°C) (in configuration.h)
SDSUPPORT (in configuration.h)
TMC_DEBUG (in configuration_adv.h)
WATCH_TEMP_PERIOD set to 90 seconds for the hotend if it fluctuates by 2 degress to ease thermal runaway sensitivity (in configuration_adv.h)
WATCH_BED_TEMP_PERIOD set to 120 seconds for the hotend if it fluctuates by 2 degress to ease thermal runaway sensitivity (in configuration_adv.h)
USE_CONTROLLER_FAN enabled to start Board Fan whenever the steppers are active, to cool stepper drivers (in configuration_adv.h)
HOTEND_IDLE_TIMEOUT enabled to avoid preheating to long without starting an actual print, so the filament does not char in the hotend (in configuration_adv.h)
define NUM_Z_STEPPER_DRIVERS 2 (in configuration_adv.h)
MESH_BED_LEVELING (in configuration.h)

Marlin Configuration required for BTT TFT35 E3

For current Bigtreetech published Marlin Settings on TFT35 go -> HERE

General options which MUST be activated:

EEPROM_SETTINGS (in Configuration.h)
REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER (in Configuration.h)
BABYSTEPPING (in Configuration_adv.h)
AUTO_REPORT_TEMPERATURES (in Configuration_adv.h)
AUTO_REPORT_POSITION (in Configuration_adv.h)
M115_GEOMETRY_REPORT (in Configuration_adv.h)
M114_DETAIL (in Configuration_adv.h)
REPORT_FAN_CHANGE (in Configuration_adv.h)

Options to support printing from onboard media:

SDSUPPORT (in Configuration.h)
LONG_FILENAME_HOST_SUPPORT (in Configuration_adv.h)
AUTO_REPORT_SD_STATUS (in Configuration_adv.h)
SDCARD_CONNECTION ONBOARD (in Configuration_adv.h)

Options to support dialog with host:

EMERGENCY_PARSER (in Configuration_adv.h)
SERIAL_FLOAT_PRECISION 4 (in Configuration_adv.h)
HOST_ACTION_COMMANDS (in Configuration_adv.h)
HOST_PROMPT_SUPPORT (in Configuration_adv.h)

Options to support M600 with host & (Un)Load menu:

NOZZLE_PARK_FEATURE (in Configuration.h)
ADVANCED_PAUSE_FEATURE (in Configuration_adv.h)
PARK_HEAD_ON_PAUSE (in Configuration_adv.h)
FILAMENT_LOAD_UNLOAD_GCODES (in Configuration_adv.h)

Options to fully support Bed Leveling menu (manual only):

G26_MESH_VALIDATION (in Configuration.h)

Marlin Configuration required for SKR 2 Rev B

For current Bigtreetech published Marlin Settings on SKR 2 go -> HERE

SERIAL_PORT 1 (in Configuration.h)
BAUDRATE 115200 (in Configuration.h)
SERIAL_PORT_2 -1 (in Configuration.h)
SERIAL_PORT_3 3 (in Configuration.h)
PIDTEMP (in Configuration.h)
PIDTEMPBED (in Configuration.h)
S_CURVE_ACCELERATION (in Configuration.h)
EEPROM_SETTINGS (in Configuration.h)
EEPROM_CHITCHAT (in Configuration.h)
INDIVIDUAL_AXIS_HOMING_MENU (in Configuration.h)
LONG_FILENAME_HOST_SUPPORT (in Configuration_adv.h)
SCROLL_LONG_FILENAMES (in Configuration_adv.h)
SDCARD_CONNECTION LCD (in Configuration_adv.h)
E0_AUTO_FAN_PIN FAN1_PIN FAN1 // Assigned to the Hotend (in Configuration_adv.h)
USE_CONTROLLER_FAN (in Configuration_adv.h)
CONTROLLER_FAN_PIN FAN2_PIN // FAN2 Assigned to electronics (in Configuration_adv.h)
CONTROLLER_FAN_EDITABLE (in Configuration_adv.h)
CONTROLLER_FAN_MENU (in Configuration_adv.h)
BABYSTEPPING (in Configuration_adv.h)
DOUBLECLICK_FOR_Z_BABYSTEPPING (in Configuration_adv.h)
BABYSTEP_ALWAYS_AVAILABLE (in Configuration_adv.h)
ARC_SUPPORT (in Configuration_adv.h)
ADVANCED_PAUSE_FEATURE (in Configuration_adv.h)
CHOPPER_TIMING CHOPPER_DEFAULT_12V (in Configuration_adv.h)
MONITOR_DRIVER_STATUS (in Configuration_adv.h)
HYBRID_THRESHOLD (in Configuration_adv.h)
X_HYBRID_THRESHOLD 100 (in Configuration_adv.h)
Y_HYBRID_THRESHOLD 100 (in Configuration_adv.h)
Z_HYBRID_THRESHOLD 15 // default is 4 (in Configuration_adv.h)
TMC_DEBUG (in Configuration_adv.h)

Custom Start Gcode

G90 ; use absolute coordinates M83 ; extruder relative mode M204 S[machine_max_acceleration_extruding] T[machine_max_acceleration_retracting] M104 S[first_layer_temperature] ; set extruder temp M140 S[first_layer_bed_temperature] ; set bed temp G28 ; home all M420 S1 G1 Y1.0 Z0.3 F1000 ; move print head up M190 S[first_layer_bed_temperature] ; wait for bed temp M109 S[first_layer_temperature] ; wait for extruder temp G92 E0.0 ; initial load G1 X170 E19 F1000 G1 Y1.6 G1 X5.0 E19 F1000 G92 E0.0 ; intro line G1 Y2.0 Z0.2 F1000 G1 X65.0 E9.0 F1000 G1 X105.0 E12.5 F1000 G92 E0.0

Custom End Gcode

G1 E-1.0 F2100 ; retract G92 E0.0 G1{if max_layer_z < max_print_height} Z{z_offset+min(max_layer_z+30, max_print_height)}{endif} E-34.0 F720 ; move print head up & retract filament G4 ; wait M104 S0 ; turn off temperature M140 S0 ; turn off heatbed M107 ; turn off fan G1 X0 Y105 F3000 ; park print head M84 ; disable motors

PrusaSlicer Setting

TBA

RepetierServer Settings

TBA

JetDev22 / CustomPrinterX1