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Lulzbot TAZ 1.0

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Revision as of 03:21, 15 February 2019 by Ubuntourist (talk | contribs) (The adventure continues)

TAZ v.1.0 Marlin firmware

Last edited by Ubuntourist ([email protected]) (kjc) 2019.02.14

See the forked Lulzbot TAZ 1.0 git repository on GitLab.

Determining which version of the TAZ and connecting to it

The “newest” addition to our collection of 3D printers is actually the oldest: The Lulzbot TAZ is actually, a Lulzbot TAZ 1.0 (according to the serial number on the back: KT-PR0010-5147).

The index.html at http://devel.lulzbot.com/TAZ/ says, among other things: *"B" - KT-PR0010 - TAZ 1.0

Using minicom, the baud rate was determined to be 115200. Sending G28 to home it made it grind gears. 

$ pronsole
offline> connect /dev/ttyACM2 115200
ttyACM2 21°>

Eventually, I found http://download.lulzbot.com/TAZ/1.0/hardware/electronics/RAMBo/ which identifies the board as “based off of the Arduino MEGA” with “5 stepper drivers” and “5 MOSFET switched outputs” with documentation at http://reprap.org/wiki/rambo

As near as I can tell, the latest in firmware and other software lives at http://download.lulzbot.com/TAZ/1.0/software/current/firmware/Marlin/

Lulzbot offers instructions on re-flashing your 3D printer’s firmware and see also RepRap’s RAMBo firmware page.

Because we neither have the original paperwork for the TAZ, nor were the EEPROM settings previously enabled, we may be forced to determine the ESTEPS settings via, IMHO, a method fraught with inaccuracy by trying to manually calibrate using the OHAI instructions.

Adding a dynamic symlink to the TAZ…

After massaging the OS with the procedures listed in Dynamic symlinks for 3D printers we see: 

$ pronsole
WARNING:root:Could not setup DBus for sleep inhibition: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
Welcome to the printer console! Type "help" for a list of available commands.

offline>
offline> connect /dev/TAZ 115200
start          
Printer is now online
External Reset 
Marlin 1.0.0   
Last Updated: 2013-03-06 | Author: LulzBot
Compiled: Apr 17 2015
Free Memory: 5504  PlannerBufferBytes: 1232
TAZ PC>
TAZ 21°>

Note the details on the firmware. Namely:

  • Marlin 1.0.0
  • Last Updated: 2013-03-06 | Author: LulzBot
  • Compiled: Apr 17 2015

Fixing Arduino

The Arduino IDE complains 

Ignoring bad library name <@pronterhost>

The library "U8glib-new" cannot be used.

Library names must contain only basic letters and numbers.

(ASCII only and no spaces, and it cannot start with a number.)

Und zo, after tracking down the symbolic links and such… 

sudo -i
$ cd /usr/share/arduino/libraries
$ rm U8glib-new
$ mv /home/demo/Taz/Marlin/ArduinoAddons/Arduino_1.x.x/libraries/U8glib-new /home/demo/Taz/Marlin/ArduinoAddons/Arduino_1.x.x/libraries/U8glibNew
$ ln -s /home/demo/Taz/Marlin/ArduinoAddons/Arduino_1.x.x/libraries/U8glibNew .
$ exit

Calibrating the TAZ

$ pronsole
WARNING:root:Could not setup DBus for sleep inhibition: org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.ScreenSaver was not provided by any .service files
Welcome to the printer console! Type "help" for a list of available commands.
offline> connect /dev/TAZ 115200
Printer is now online
TAZ 21°> move z 10
TAZ 21°> move x 10
TAZ 21°> move x 10
TAZ 21°> move x 10
TAZ 21°> move x 10
TAZ 21°> move x 10
TAZ 21°> move x 10
TAZ 21°> move x 10
TAZ 21°> settemp 215
Setting hotend temperature to 215.0 degrees Celsius.
TAZ 21°> 
TAZ 21°/215°> 
TAZ 21°/215°> 
TAZ 21°/215°> 
TAZ 22°/215°> 
   .
   .
   .
TAZ 215°/215°> 
TAZ 215°/215°> extrude 10
TAZ 215°/215°> extrude 10
TAZ 215°/215°> extrude 10
TAZ 215°/215°> extrude 40
   .
   .
   .

NOTE: Moving Z 10 “mm” resulted in the extruder assembly climbing WAY too high (especially compared to the multiple X movements which, even after 7 of them resulted in considerably less distance total.)

(Extrusion repeated until green filament residue became clear filament.) At which point Bobby took over and deemed the current feed calibration to be “close enough” but the ESTEPS value is still unknown.

BTW, Bobby says the Y calibration is 0.24 mm per step.

Fun with Firmware Flashing

Downloading all the firmware: 

$ wget -r -np -R "index.html*" -e robots=off http://download.lulzbot.com/TAZ/1.0/software/current/firmware/Marlin/Marlin/

In order to get the current settings from the TAZ, EEPROM_SETTINGS needs to be enabled which is apparently done in Configuration.h

Hopefully, the arcane details can be ferreted out of the Marlin Configuration,h documentation

First, Configuration.h has ridiculously long lines, now word-wrapped for sanity.

Next, a more vexing problem, I think: pronterhost has Arduino v.2.1.0.5+dfsg2-4.1. Naturally, Marlin only offers Arduino add-ons for Arduino 0.xx and Arduino 1.x.x.

Fortunately, further research yielded a tidbit from the Arduino Playground: An SPI library is now included in the Arduino software. See the SPI library reference for details. 

$ cd Marlin/ArduinoAddons
$ find . -type f

./Arduino_0.xx/Gen6/boards.txt
./Arduino_0.xx/libraries/SPI/keywords.txt
./Arduino_0.xx/libraries/SPI/SPI.cpp
./Arduino_0.xx/libraries/SPI/SPI.h
./Arduino_0.xx/libraries/LiquidCrystal/keywords.txt
./Arduino_0.xx/libraries/LiquidCrystal/LiquidCrystal.cpp
./Arduino_0.xx/libraries/LiquidCrystal/LiquidCrystal.h
./Arduino_0.xx/Sanguino/boards.txt
./Arduino_0.xx/Sanguino/programmers.txt
./Arduino_0.xx/Gen7/boards.txt
    
./Arduino_1.x.x/libraries/SPI/keywords.txt
./Arduino_1.x.x/libraries/SPI/SPI.cpp
./Arduino_1.x.x/libraries/SPI/SPI.h
./Arduino_1.x.x/libraries/LiquidCrystal/keywords.txt
./Arduino_1.x.x/libraries/LiquidCrystal/LiquidCrystal.cpp
./Arduino_1.x.x/libraries/LiquidCrystal/LiquidCrystal.h
./Arduino_1.x.x/sanguino/boards.txt

According to the SPI library reference documentation, the SPI stands for Serial Peripheral Interface`.

The LiquidCrystal library, as one might guess, allows Arduino to control LCDs. Since we don't have an LCD on this machine, it's currently irrelevant.

In a previous life, I used a tool called dfu-programmer to flash a PrintrBot's firmware... (Under Arch Linux, I have both the dfu-programmer and dfu-util packages installed.)

Backup the flash memory: 

$ avrdude -C /etc/avrdude.conf -p m2560 -c wiring -P /dev/TAZ -b 115200 -U flash:r:flash-2019-02-14.hex:i

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9801 (probably m2560)
avrdude: reading flash memory:

Reading | ################################################## | 100% 33.56s

avrdude: writing output file "flash-2019-02-14.hex"

avrdude: safemode: Fuses OK (E:FD, H:D0, L:FF)

avrdude done.  Thank you.

And the EEPROM: 

$ avrdude -C /etc/avrdude.conf -p m2560 -c wiring -P /dev/TAZ -b 115200 -U eeprom:r:eeprom-2019-02-14.hex:i

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9801 (probably m2560)
avrdude: reading eeprom memory:

Reading | ################################################## | 100% 4.20s

avrdude: writing output file "eeprom-2019-02-14.hex"

avrdude: safemode: Fuses OK (E:FD, H:D0, L:FF)

avrdude done.  Thank you.

Examining the dumped EEPROM .hex file above seems to indicate that it’s empty: Basically filled with binary 1’s (a.k.a. Hex FF, integer -1, Boolean TRUE).

See active-configuration.md for a look which lines are not commented out in Configuration.h.

For comparison, here’s what the Lulzbot Mini reports (word wrapped for sanity): 

$ pronsole
WARNING:root:Could not setup DBus for sleep inhibition:
             org.freedesktop.DBus.Error.ServiceUnknown: The name
             org.freedesktop.ScreenSaver was not provided by any
             .service files
WARNING:root:RPC server bound on non-default port 7979
Welcome to the printer console! Type "help" for a list of available commands.
offline> connect /dev/MINI
start
Printer is now online
Marlin 1.1.0.11
Last Updated: 2016-04-27 12:00 | Author: (Aleph Objects Inc., LulzBot Mini)
Compiled: Dec 21 2016
Free Memory: 4404  PlannerBufferBytes: 1232
V23 stored settings retrieved (396 bytes)
Steps per unit:
M92 X100.50 Y100.50 Z1600.00 E833.00
Maximum feedrates (mm/s):
M203 X800.00 Y800.00 Z8.00 E40.00
Maximum Acceleration (mm/s2):
M201 X9000 Y9000 Z100 E1000
Accelerations: P=printing, R=retract and T=travel
M204 P2000.00 R3000.00 T2000.00
Advanced variables: S=Min feedrate (mm/s),
                    T=Min travel feedrate (mm/s),
                    B=minimum segment time (ms),
                    X=maximum XY jerk (mm/s),
                    Z=maximum Z jerk (mm/s),
                    E=maximum E jerk (mm/s)
M205 S0.00 T0.00 B20000 X12.00 Z0.40 E10.00
Home offset (mm):
M206 X0.00 Y0.00 Z0.00
PID settings:
M301 P28.79 I1.91 D108.51 C100.00 L20
M304 P294.00 I65.00 D382.00
Filament settings: Disabled
M200 D3.00
M200 D0
Z-Probe Offset (mm):
M851 Z-1.43
MINI PC>

Upgrading the Arduino IDE

The MatterHackers article “How To Successfully Flash Your 3D Printer’s Firmware” indicates we need a special RAMBo boards JSON file to install into the Arduino IDE…

The instructions for installing don’t match what I see… Sigh. Naturally, the Linux version has version number suggesting it is much more recent than whatever Arduino guides suggest using… But, wrong. And also naturally, there’s nothing distributed as a .deb package – at least not from a source I trust. So. I need to install using the official Arduino Guide for Linux. 

$ sudo dpkg -P arduino arduino-core
[sudo] password for ubuntourist:
(Reading database ... 336652 files and directories currently installed.)
Removing arduino (2:1.0.5+dfsg2-4.1) ...
Purging configuration files for arduino (2:1.0.5+dfsg2-4.1) ...
Removing arduino-core (2:1.0.5+dfsg2-4.1) ...
dpkg: warning: while removing arduino-core, directory '/usr/share/arduino/libraries/Wire/utility' not empty so not removed
dpkg: warning: while removing arduino-core, directory '/usr/share/arduino/libraries/SPI' not empty so not removed
dpkg: warning: while removing arduino-core, directory '/usr/share/arduino/libraries/LiquidCrystal' not empty so not removed
dpkg: warning: while removing arduino-core, directory '/usr/share/arduino/hardware/tools' not empty so not removed
Processing triggers for shared-mime-info (1.10-1) ...
Processing triggers for man-db (2.8.5-2) ...
Processing triggers for hicolor-icon-theme (0.17-2) ...
Processing triggers for mime-support (3.62) ...
Processing triggers for desktop-file-utils (0.23-4) ...
$

And this is why we document… Apparently, the stock Arduino Debian packages have been futzed with, and I apparently wiped whatever mods might have been there. 

/usr/share/arduino/libraries/Wire/utility$ ls -Al
total 36
-rw-r--r-- 1 demo demo 16386 Oct 19  2013 '#twi.c#'
lrwxrwxrwx 1 demo demo    49 Oct 19  2013  .#twi.c -> [email protected]:1381110447
-rw-r--r-- 1 demo demo 16366 May  5  2013  twi.c~
ubuntourist@pronterhost:/usr/share/arduino/libraries/Wire/utility$ diff -u twi.c~ \#twi.c#
--- twi.c~      2013-05-05 13:55:52.000000000 -0500
+++ #twi.c#     2013-10-19 20:10:50.817962597 -0500
@@ -202,6 +202,7 @@
   while(TWI_READY != twi_state){
     continue;
   }
+
   twi_state = TWI_MTX;
   twi_sendStop = sendStop;
   // reset error state (0xFF.. no error occured)
@@ -210,11 +211,12 @@
   // initialize buffer iteration vars
   twi_masterBufferIndex = 0;
   twi_masterBufferLength = length;
-
+
   // copy data to twi buffer
   for(i = 0; i < length; ++i){
     twi_masterBuffer[i] = data[i];
   }
+

   // build sla+w, slave device address + w bit
   twi_slarw = TW_WRITE;
@@ -224,6 +226,7 @@
   // in the ISR. Don't do it again.
   //
   if (true == twi_inRepStart) {
+
     // if we're in the repeated start state, then we've already sent the start,
     // (@@@ we hope), and the TWI statemachine is just waiting for the address byte.
     // We need to remove ourselves from the repeated start state before we enable interrupts,
@@ -242,7 +245,7 @@
   while(wait && (TWI_MTX == twi_state)){
     continue;
   }
-
+  return twi_state;
   if (twi_error == 0xFF)
     return 0;  // success
   else if (twi_error == TW_MT_SLA_NACK)
$

And, whatever [email protected]:1381110447 was, it appears to be no more. The symbolic link above points nowhere. A more complete picture of what the purge did not remove: 

$ cd /usr/share/arduino
$ ls -AR
.:
hardware  libraries

./hardware:
Sanguino  tools

./hardware/Sanguino:
boards.txt  bootloaders  cores  programmers.txt

./hardware/Sanguino/bootloaders:
atmega644p

./hardware/Sanguino/bootloaders/atmega644p:
ATmegaBOOT_324P.hex  ATmegaBOOT_644.hex  ATmegaBOOT_644P.hex  ATmegaBOOT.c  Makefile  README.txt

./hardware/Sanguino/cores:
arduino

./hardware/Sanguino/cores/arduino:
 binary.h             main.cpp         Print.h        WConstants.h      wiring_digital.c   wiring_shift.c   WString.h
'Copy of wiring.h'    pins_arduino.c   Stream.h       WInterrupts.c     wiring.h           WMath.cpp
 HardwareSerial.cpp   pins_arduino.h   Tone.cpp       wiring_analog.c   wiring_private.h   WProgram.h
 HardwareSerial.h     Print.cpp        WCharacter.h   wiring.c          wiring_pulse.c     WString.cpp

./hardware/tools:
'#avrdude.conf#'

./libraries:
hardware  libraries  LiquidCrystal  SPI  U8glib  u8glib_arduino_v1.18.1.zip  U8glibNew  Wire

./libraries/LiquidCrystal:
LiquidCrystal

./libraries/SPI:
SPI

./libraries/Wire:
utility

./libraries/Wire/utility:
'#twi.c#'   .#twi.c   twi.c~

$ cd ~/
$ mkdir build
$ cd buid
$ tar xJvf arduino-1.8.8-linux32.tar.xz
$  sudo ./install.sh
Adding desktop shortcut, menu item and file associations for Arduino IDE... done!

Gah! Who said I wanted a desktop? 

$ sudo ./uninstall.sh
Removing desktop shortcut and menu item for Arduino IDE... done!

So. I have to run from within the user directory where I untarred. Bleah!

Compiling and uploading with modified Configuration.h

$ arduino

...Preferences -> Additional Boards Manager URLs
...https://raw.githubusercontent.com/ultimachine/ArduinoAddons/master/package_ultimachine_index.json
...Tools -> Board -> Board Manager -> RAMBo -> Install
...Tools -> Board -> Rambo
...Tools -> Port -> /dev/ttyACM1  # SUBJECT TO CHANGE !!!
...(checkbox, i.e. compile)
...(right arrow, i.e. upload)

Sketch uses 48566 bytes (18%) of program storage space. Maximum is 258048 bytes.
Global variables use 2627 bytes of dynamic memory.
Sketch uses 48566 bytes (18%) of program storage space. Maximum is 258048 bytes.
Global variables use 2627 bytes of dynamic memory.

$ pronsole
WARNING:root:Could not setup DBus for sleep inhibition:
             org.freedesktop.DBus.Error.ServiceUnknown:
	     The name org.freedesktop.ScreenSaver was not provided by
	     any .service files
WARNING:root:RPC server bound on non-default port 7979
Welcome to the printer console! Type "help" for a list of available commands.
offline> connect /dev/TAZ
start
Printer is now online
External Reset
Marlin 1.0.0
Last Updated: 2013-03-06 | Author: LulzBot
Compiled: Feb 14 2019
Free Memory: 5429  PlannerBufferBytes: 1232
Using Default settings:
Steps per unit:
M92 X100.50 Y100.50 Z800.00 E800.00
Maximum feedrates (mm/s):
M203 X500.00 Y500.00 Z10.00 E45.00
Maximum Acceleration (mm/s2):
M201 X9000 Y9000 Z100 E10000
Acceleration: S=acceleration, T=retract acceleration
M204 S500.00 T3000.00
Advanced variables: S=Min feedrate (mm/s),
                    T=Min travel feedrate (mm/s),
		    B=minimum segment time (ms),
		    X=maximum xY jerk (mm/s),
		    Z=maximum Z jerk (mm/s)
M205 S0.00 T0.00 B20000 X5.00 Z0.40 E5.00
Home offset (mm):
M206 X0.00 Y0.00 Z0.00
PID settings:
M301 P22.20 I1.08 D114.00
TAZ PC>
TAZ 22°> M501
SENDING:M501
Using Default settings:
Steps per unit:
M92 X100.50 Y100.50 Z800.00 E800.00
Maximum feedrates (mm/s):
M203 X500.00 Y500.00 Z10.00 E45.00
Maximum Acceleration (mm/s2):
M201 X9000 Y9000 Z100 E10000
Acceleration: S=acceleration, T=retract acceleration
M204 S500.00 T3000.00
Advanced variables: S=Min feedrate (mm/s),
                    T=Min travel feedrate (mm/s),
		    B=minimum segment time (ms),
		    X=maximum xY jerk (mm/s),
		    Z=maximum Z jerk (mm/s)
M205 S0.00 T0.00 B20000 X5.00 Z0.40 E5.00
Home offset (mm):
M206 X0.00 Y0.00 Z0.00
PID settings:
M301 P22.20 I1.08 D114.00
TAZ 22°>

Success!

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