Marlin 1.1.9

Printrboard and Modern Marlin

Tested Release For Heated and Non-Heated Bed Models

Highlights

• This firmware upgrade increases print quality to a level comparible with Prusa Mk3 or Ultimaker 3 all thanks to Linear Advance Version 1.5 which became avalible with marlin 1.1.9
• Babystepping allows live z offset during the start of the print
• 9 Point Auto Bilinear Mesh Bedleving
• Filament Changing routine now accessable from LCD
• Custom scrips from LCD for various tasks such as Home/Bedleveing/Preheat
• 3 Point Leveling seems to work better for smaller beds
• Bilinear Bed Leveling which is usefull for larger unveven beds
• NeoPixel Printer status via EXP2 Header -Printrbot Neopixel is BRG

Change Log

v0.3 Software Fan PWM dissabled - caused major decrease in print quality v0.2 Software FAN PWM enabled to silence squeeky fans

Marlin 1.1.9 first time bed leveling guide - after flashing

Printrbot Play 0.2mm layer height Cura 3.5.1

This isn't your grandmas 3D printer, please make sure your inductive probe is adjusted properly

• This firmware should be universal for any printrbot, just choose heated bed firmware if you have that option.

• You will need to update the steps/mm for your machine Avaliable here

• Depending on the model of your printer you will need to adjust the Stepper current

  Steps M92 X80 Y80 Z2020 E94

• Set Stepper Current for your Printer

  M909 READ: echo:Stepper current values in % (Amps): Stepper current values in % (Amps): READ: echo: X:60.00 (16581.82) Y:65.00 (36581.82) Z:60.00 (16581.82) E:65.00 (36581.82) X:60.00 (16581.82) Y:65.00 (36581.82) Z:60.00 (16581.82) E:65.00 (36581.82)

Example: M907 X60 sets the X-axis motor current to 60% of max possible

M909 Read Motor current Values
M907 Set Current Value
M910 Store Stepper Current Values

Linear Advance is enabled by default

Retraction distance should be limited to 0.7mm
Default vaule is K0.08 Be sure to calibrate your extruder before a
This can be adjusted while printing
M900 K0.08 ;set k value
M500 ;save
Play with MK8 style extruder Use a K0.05

• Calibrate your extruder steps/mm before K-factor Extruder Calibration

• Please calibrate your K-factor and share results, * Each material and color has it's own properties for best results caibrate for each material you use. Add the K value to your start gCode for each material Linear Advance gcode Geneartor

Babystepping

• M290 and LCD menu items to move the axes by tiny increments without changing the current position values. This feature is used primarily to adjust the Z axis in the first layer of a print in real-time. Warning: Does not respect endstops! * This replaces the need to set the Z offset using M212

babystepping can be adjusted while printing over usb - no LCD required

Joging the z axis down or up in incriments of 0.1mm while printing adjusts the nozzle offset This can be done using Cura, Simplify 3D, Pronterface, etc Make sure to save the offset by sending the M500 command while printing

Zoffset can also be set using M815 but is not completely nessary M815 Z-1.95 ;this is the default value Use M500 to save Bed Probing

LCD semi-tested

Custom User Menu Scripts
Enabled LCD Support for Ultipanel and Ultra_lcd
SD Card Support on the LCD is dissabled as of right now marlin has exactly engouh memory to fit on the AT90 128

PID

READ: Classic PID READ: Kp: 35.79 Ki: 7.05 Kd: 45.44 READ: PID Autotune finished! Put the last Kp, Ki and Kd constants from below into Configuration.h READ: #define DEFAULT_Kp 35.79 READ: #define DEFAULT_Ki 7.05 READ: #define DEFAULT_Kd 45.44

Start gCode

M82 ;absolute extrusion mode
G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
G28 ;move X/Y to min endstops
G29 ;run auto bed leveling
G92 E0 ;zero the extruded length
G1 X0 Y0 Z.2 F7000 ;move to front corner and lower 
G1 X35 Z.2 E35 F800 ;purge 35mm of filament
G92 E0 ;zero the extruded length again
G1 F9000
;Put printing message on LCD screen
M117 Printing...

Usefull gCode

M420 S1 ;loads previous bed leving matrix
M900 K0 ;dissables Linear Advance
M900 K0.5 ;Set linear advance K-value
M290 Z0.02 ; babystep move up 0.02mm on the Z axis 

M115 Feature support list
M43 Debug Pins

Pin Assignments

Expansion Header pinout diagrams

Neopixel Pins

EXP2 Pinout

Using Printrboard without an LCD - all commands avalible LCD Menu gcode equivelent

Build Using PlatformIO or Marlin-Config GUI editor

I find Marlin GUI editor can be very laggy so instead I perfer to access it through Chrome

http://localhost:3000

Marlin-config GUI The printrboard only has 128kb of program memory this build of marlin 1.1.9 as configured currently occupies 99.1%

Flash using ATMEL FLIP

Before Flashing check your eprom and save your steps/mm and machine size After Flashing Make sure to set EPROM to defaults using M502 then M500 to save ATMEL FLIP Download

Guide

Firmware Loading Guide