unupingu / marlin-3d-printer-firmware

Marlin firmware for my Geeetech i3 Pro B with GT2560A+ board

Marlin 3D Printer Firmware

Everything in this repo is for Geeetech I3 Pro B

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Refer to .md file for the Marlin version you want to use.

Read that .md file carefully, PLEASE!

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Below is mostly for Marlin 1.1.x

Marlin firmware for my Geeetech i3 Pro B with GT2560A+ board

Includes BLTouch and T8 lead screws

When compiling and uploading with Arduino IDE:
Set board:
Tools > Board > Arduino Mega 2560
Also set correct port, ie /dev/tty/USB0

Testing and calibrating

View current settings and parameters

M503

BLTouch

M280 P0 S10 ; pushes the pin down
M280 P0 S90 ; pulls the pin up
M280 P0 S120 ; Self test – keeps going until you do pin up/down or release alarm
M280 P0 S160 ; Release alarm

PID Tuning

Start fan at 100%

M106 S255

Start tuning

M303 E0 S200 C8

This will return something like:

bias: 174 d: 80 min: 197.27 max: 202.81 Ku: 36.77 Tu: 41.62
Classic PIDRecv:  Kp: 22.06 Ki: 1.06 Kd: 114.78
PID Autotune finished! Put the last Kp, Ki and Kd constants from below into Configuration.h
#define  DEFAULT_Kp 22.06
#define  DEFAULT_Ki 1.06
#define  DEFAULT_Kd 114.78

Enter new values with:

M301 P22.06 I1.06 D114.78

Save to EEPROM with:

M500

Steps/mm

Show current settings (steps per mm etc)

M501

Returns

echo:V47 stored settings retrieved (614 bytes; crc 29566)
echo:  G21    ; Units in mm
echo:  M149 C ; Units in Celsius

echo:Filament settings: Disabled
echo:  M200 D1.75
echo:  M200 D0
echo:Steps per unit:
echo:  M92 X81.50 Y81.50 Z400.69 E94.00
echo:Maximum feedrates (units/s):
echo:  M203 X400.00 Y400.00 Z2.00 E45.00
echo:Maximum Acceleration (units/s2):
echo:  M201 X4000 Y4000 Z40 E4000
echo:Acceleration (units/s2): P<print_accel> R<retract_accel> T<travel_accel>
echo:  M204 P3000.00 R3000.00 T3000.00
echo:Advanced: S<min_feedrate> T<min_travel_feedrate> B<min_segment_time_us> X<max_xy_jerk> Z<max_z_jerk> E<max_e_jerk>
echo:  M205 S0.00 T0.00 B20000 X10.00 Y10.00 Z0.30 E5.00
echo:Home offset:
echo:  M206 X0.00 Y0.00 Z0.00
echo:Auto Bed Leveling:
echo:  M420 S0
echo:Material heatup parameters:
echo:  M145 S0 H180 B70 F0
echo:  M145 S1 H215 B105 F0
echo:PID settings:
echo:  M301 P22.06 I1.06 D114.78
echo:Z-Probe Offset (mm):
echo:  M851 Z-0.61

Set Z-Offset

View current offset

M851

Returns

Send: M851
Recv: echo:Probe Z Offset: -0.95
Recv: ok

Set new offset

M851 Z-0.8

Returns

Send: M851 Z-0.8
Recv: echo:Probe Z Offset: -0.80
Recv: ok

Save new value to EEPROM

M500

Higher value -> smaller distance from bed

Set X/Y center

Home X and Y axes

G28 X Y

Set extruder at 0:0

G1 X0 Y0

Set extruder at bed center

G1 X95 Y96

if bed size is set to 190x192mm at lines 782-792 in Configuration.h in Marlin firmware

// The size of the print bed
#define X_BED_SIZE190
#define Y_BED_SIZE 192

Compensate with

#define X_MIN_POS 0
#define Y_MIN_POS 0
...
#define X_MAX_POS X_BED_SIZE
#define Y_MAX_POS Y_BED_SIZE