Merge pull request #409 from buildrob202/Marlin_v1

Implement automatic cold-end/extruder motor fan control based on nozzle temperature
This commit is contained in:
ErikZalm 2013-05-19 02:10:33 -07:00
commit b2eeebd9c3
6 changed files with 363 additions and 285 deletions

View file

@ -51,6 +51,9 @@
#define MOTHERBOARD 7
#endif
// This defines the number of extruders
#define EXTRUDERS 1
//// The following define selects which power supply you have. Please choose the one that matches your setup
// 1 = ATX
// 2 = X-Box 360 203Watts (the blue wire connected to PS_ON and the red wire to VCC)

View file

@ -63,21 +63,31 @@
//This is for controlling a fan to cool down the stepper drivers
//it will turn on when any driver is enabled
//and turn off after the set amount of seconds from last driver being disabled again
//#define CONTROLLERFAN_PIN 23 //Pin used for the fan to cool controller, comment out to disable this function
#define CONTROLLERFAN_SEC 60 //How many seconds, after all motors were disabled, the fan should run
#define CONTROLLERFAN_PIN -1 //Pin used for the fan to cool controller (-1 to disable)
#define CONTROLLERFAN_SECS 60 //How many seconds, after all motors were disabled, the fan should run
#define CONTROLLERFAN_SPEED 255 // == full speed
// When first starting the main fan, run it at full speed for the
// given number of milliseconds. This gets the fan spinning reliably
// before setting a PWM value. (Does not work with software PWM for fan on Sanguinololu)
//#define FAN_KICKSTART_TIME 100
// Extruder cooling fans
// Configure fan pin outputs to automatically turn on/off when the associated
// extruder temperature is above/below EXTRUDER_AUTO_FAN_TEMPERATURE.
// Multiple extruders can be assigned to the same pin in which case
// the fan will turn on when any selected extruder is above the threshold.
#define EXTRUDER_0_AUTO_FAN_PIN -1
#define EXTRUDER_1_AUTO_FAN_PIN -1
#define EXTRUDER_2_AUTO_FAN_PIN -1
#define EXTRUDER_AUTO_FAN_TEMPERATURE 50
#define EXTRUDER_AUTO_FAN_SPEED 255 // == full speed
//===========================================================================
//=============================Mechanical Settings===========================
//===========================================================================
// This defines the number of extruders
#define EXTRUDERS 1
#define ENDSTOPS_ONLY_FOR_HOMING // If defined the endstops will only be used for homing
@ -210,9 +220,9 @@
// However, THIS FEATURE IS UNSAFE!, as it will only work if interrupts are disabled. And the code could hang in an interrupt routine with interrupts disabled.
//#define WATCHDOG_RESET_MANUAL
#endif
// Enable the option to stop SD printing when hitting and endstops, needs to be enabled from the LCD menu when this option is enabled.
//#define ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
// Enable the option to stop SD printing when hitting and endstops, needs to be enabled from the LCD menu when this option is enabled.
//#define ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
// extruder advance constant (s2/mm3)
//
@ -276,7 +286,7 @@ const unsigned int dropsegments=5; //everything with less than this number of st
#else
#define BLOCK_BUFFER_SIZE 16 // maximize block buffer
#endif
//The ASCII buffer for recieving from the serial:
#define MAX_CMD_SIZE 96

View file

@ -319,7 +319,7 @@ void setup_photpin()
void setup_powerhold()
{
#ifdef SUICIDE_PIN
#if (SUICIDE_PIN> -1)
#if (SUICIDE_PIN> 0)
SET_OUTPUT(SUICIDE_PIN);
WRITE(SUICIDE_PIN, HIGH);
#endif
@ -410,14 +410,10 @@ void setup()
servo_init();
lcd_init();
#ifdef CONTROLLERFAN_PIN
#if CONTROLLERFAN_PIN > 0
SET_OUTPUT(CONTROLLERFAN_PIN); //Set pin used for driver cooling fan
#endif
#ifdef EXTRUDERFAN_PIN
SET_OUTPUT(EXTRUDERFAN_PIN); //Set pin used for extruder cooling fan
#endif
#endif
}
@ -1040,6 +1036,10 @@ void process_commands()
break;
}
}
#if FAN_PIN > 0
if (pin_number == FAN_PIN)
fanSpeed = pin_status;
#endif
if (pin_number > -1)
{
pinMode(pin_number, OUTPUT);
@ -2064,7 +2064,12 @@ void prepare_arc_move(char isclockwise) {
previous_millis_cmd = millis();
}
#ifdef CONTROLLERFAN_PIN
#if CONTROLLERFAN_PIN > 0
#if CONTROLLERFAN_PIN == FAN_PIN
#error "You cannot set CONTROLLERFAN_PIN equal to FAN_PIN"
#endif
unsigned long lastMotor = 0; //Save the time for when a motor was turned on last
unsigned long lastMotorCheck = 0;
@ -2085,35 +2090,17 @@ void controllerFan()
{
lastMotor = millis(); //... set time to NOW so the fan will turn on
}
if ((millis() - lastMotor) >= (CONTROLLERFAN_SEC*1000UL) || lastMotor == 0) //If the last time any driver was enabled, is longer since than CONTROLLERSEC...
if ((millis() - lastMotor) >= (CONTROLLERFAN_SECS*1000UL) || lastMotor == 0) //If the last time any driver was enabled, is longer since than CONTROLLERSEC...
{
WRITE(CONTROLLERFAN_PIN, LOW); //... turn the fan off
digitalWrite(CONTROLLERFAN_PIN, 0);
analogWrite(CONTROLLERFAN_PIN, 0);
}
else
{
WRITE(CONTROLLERFAN_PIN, HIGH); //... turn the fan on
}
}
}
#endif
#ifdef EXTRUDERFAN_PIN
unsigned long lastExtruderCheck = 0;
void extruderFan()
{
if ((millis() - lastExtruderCheck) >= 2500) //Not a time critical function, so we only check every 2500ms
{
lastExtruderCheck = millis();
if (degHotend(active_extruder) < EXTRUDERFAN_DEC)
{
WRITE(EXTRUDERFAN_PIN, LOW); //... turn the fan off
}
else
{
WRITE(EXTRUDERFAN_PIN, HIGH); //... turn the fan on
// allows digital or PWM fan output to be used (see M42 handling)
digitalWrite(CONTROLLERFAN_PIN, CONTROLLERFAN_SPEED);
analogWrite(CONTROLLERFAN_PIN, CONTROLLERFAN_SPEED);
}
}
}
@ -2137,11 +2124,11 @@ void manage_inactivity()
}
}
}
#if( KILL_PIN>-1 )
#if KILL_PIN > 0
if( 0 == READ(KILL_PIN) )
kill();
#endif
#ifdef CONTROLLERFAN_PIN
#if CONTROLLERFAN_PIN > 0
controllerFan(); //Check if fan should be turned on to cool stepper drivers down
#endif
#ifdef EXTRUDER_RUNOUT_PREVENT

View file

@ -69,9 +69,9 @@ volatile long endstops_stepsTotal,endstops_stepsDone;
static volatile bool endstop_x_hit=false;
static volatile bool endstop_y_hit=false;
static volatile bool endstop_z_hit=false;
#ifdef ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
bool abort_on_endstop_hit = false;
#endif
#ifdef ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
bool abort_on_endstop_hit = false;
#endif
static bool old_x_min_endstop=false;
static bool old_x_max_endstop=false;
@ -184,20 +184,20 @@ void checkHitEndstops()
SERIAL_ECHOPAIR(" Z:",(float)endstops_trigsteps[Z_AXIS]/axis_steps_per_unit[Z_AXIS]);
LCD_MESSAGEPGM(MSG_ENDSTOPS_HIT "Z");
}
SERIAL_ECHOLN("");
SERIAL_ECHOLN("");
endstop_x_hit=false;
endstop_y_hit=false;
endstop_z_hit=false;
#ifdef ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
if (abort_on_endstop_hit)
{
endstop_z_hit=false;
#ifdef ABORT_ON_ENDSTOP_HIT_FEATURE_ENABLED
if (abort_on_endstop_hit)
{
card.sdprinting = false;
card.closefile();
quickStop();
quickStop();
setTargetHotend0(0);
setTargetHotend1(0);
setTargetHotend2(0);
}
}
#endif
}
}
@ -879,10 +879,6 @@ void st_init()
disable_e2();
#endif
#ifdef CONTROLLERFAN_PIN
SET_OUTPUT(CONTROLLERFAN_PIN); //Set pin used for driver cooling fan
#endif
// waveform generation = 0100 = CTC
TCCR1B &= ~(1<<WGM13);
TCCR1B |= (1<<WGM12);

View file

@ -99,8 +99,9 @@ static volatile bool temp_meas_ready = false;
#ifdef FAN_SOFT_PWM
static unsigned char soft_pwm_fan;
#endif
#if EXTRUDER_0_AUTO_FAN_PIN > 0 || EXTRUDER_1_AUTO_FAN_PIN > 0 || EXTRUDER_2_AUTO_FAN_PIN > 0
static unsigned long extruder_autofan_last_check;
#endif
#if EXTRUDERS > 3
# error Unsupported number of extruders
@ -306,6 +307,76 @@ int getHeaterPower(int heater) {
return soft_pwm[heater];
}
#if EXTRUDER_0_AUTO_FAN_PIN > 0 || EXTRUDER_1_AUTO_FAN_PIN > 0 || EXTRUDER_2_AUTO_FAN_PIN > 0
#if FAN_PIN > 0
#if EXTRUDER_0_AUTO_FAN_PIN == FAN_PIN
#error "You cannot set EXTRUDER_0_AUTO_FAN_PIN equal to FAN_PIN"
#endif
#if EXTRUDER_1_AUTO_FAN_PIN == FAN_PIN
#error "You cannot set EXTRUDER_1_AUTO_FAN_PIN equal to FAN_PIN"
#endif
#if EXTRUDER_2_AUTO_FAN_PIN == FAN_PIN
#error "You cannot set EXTRUDER_2_AUTO_FAN_PIN equal to FAN_PIN"
#endif
#endif
void setExtruderAutoFanState(int pin, bool state)
{
unsigned char newFanSpeed = (state != 0) ? EXTRUDER_AUTO_FAN_SPEED : 0;
// this idiom allows both digital and PWM fan outputs (see M42 handling).
pinMode(pin, OUTPUT);
digitalWrite(pin, newFanSpeed);
analogWrite(pin, newFanSpeed);
}
void checkExtruderAutoFans()
{
uint8_t fanState = 0;
// which fan pins need to be turned on?
#if EXTRUDER_0_AUTO_FAN_PIN > 0
if (current_temperature[0] > EXTRUDER_AUTO_FAN_TEMPERATURE)
fanState |= 1;
#endif
#if EXTRUDER_1_AUTO_FAN_PIN > 0
if (current_temperature[1] > EXTRUDER_AUTO_FAN_TEMPERATURE)
{
if (EXTRUDER_1_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN)
fanState |= 1;
else
fanState |= 2;
}
#endif
#if EXTRUDER_2_AUTO_FAN_PIN > 0
if (current_temperature[2] > EXTRUDER_AUTO_FAN_TEMPERATURE)
{
if (EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_0_AUTO_FAN_PIN)
fanState |= 1;
else if (EXTRUDER_2_AUTO_FAN_PIN == EXTRUDER_1_AUTO_FAN_PIN)
fanState |= 2;
else
fanState |= 4;
}
#endif
// update extruder auto fan states
#if EXTRUDER_0_AUTO_FAN_PIN > 0
setExtruderAutoFanState(EXTRUDER_0_AUTO_FAN_PIN, (fanState & 1) != 0);
#endif
#if EXTRUDER_1_AUTO_FAN_PIN > 0
if (EXTRUDER_1_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN)
setExtruderAutoFanState(EXTRUDER_1_AUTO_FAN_PIN, (fanState & 2) != 0);
#endif
#if EXTRUDER_2_AUTO_FAN_PIN > 0
if (EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN
&& EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
setExtruderAutoFanState(EXTRUDER_2_AUTO_FAN_PIN, (fanState & 4) != 0);
#endif
}
#endif // any extruder auto fan pins set
void manage_heater()
{
float pid_input;
@ -398,8 +469,15 @@ void manage_heater()
#endif
} // End extruder for loop
#if EXTRUDER_0_AUTO_FAN_PIN > 0 || EXTRUDER_1_AUTO_FAN_PIN > 0 || EXTRUDER_2_AUTO_FAN_PIN > 0
if(millis() - extruder_autofan_last_check > 2500) // only need to check fan state very infrequently
{
checkExtruderAutoFans();
extruder_autofan_last_check = millis();
}
#endif
#ifndef PIDTEMPBED
if(millis() - previous_millis_bed_heater < BED_CHECK_INTERVAL)
return;

450
README.md
View file

@ -1,223 +1,227 @@
WARNING:
--------
THIS IS RELEASE CANDIDATE 2 FOR MARLIN 1.0.0
The configuration is now split in two files
Configuration.h for the normal settings
Configuration_adv.h for the advanced settings
Gen7T is not supported.
Quick Information
===================
This RepRap firmware is a mashup between <a href="https://github.com/kliment/Sprinter">Sprinter</a>, <a href="https://github.com/simen/grbl/tree">grbl</a> and many original parts.
Derived from Sprinter and Grbl by Erik van der Zalm.
Sprinters lead developers are Kliment and caru.
Grbls lead developer is Simen Svale Skogsrud. Sonney Jeon (Chamnit) improved some parts of grbl
A fork by bkubicek for the Ultimaker was merged, and further development was aided by him.
Some features have been added by:
Lampmaker, Bradley Feldman, and others...
Features:
* Interrupt based movement with real linear acceleration
* High steprate
* Look ahead (Keep the speed high when possible. High cornering speed)
* Interrupt based temperature protection
* preliminary support for Matthew Roberts advance algorithm
For more info see: http://reprap.org/pipermail/reprap-dev/2011-May/003323.html
* Full endstop support
* SD Card support
* SD Card folders (works in pronterface)
* SD Card autostart support
* LCD support (ideally 20x4)
* LCD menu system for autonomous SD card printing, controlled by an click-encoder.
* EEPROM storage of e.g. max-velocity, max-acceleration, and similar variables
* many small but handy things originating from bkubicek's fork.
* Arc support
* Temperature oversampling
* Dynamic Temperature setpointing aka "AutoTemp"
* Support for QTMarlin, a very beta GUI for PID-tuning and velocity-acceleration testing. https://github.com/bkubicek/QTMarlin
* Endstop trigger reporting to the host software.
* Updated sdcardlib
* Heater power reporting. Useful for PID monitoring.
* PID tuning
* CoreXY kinematics (www.corexy.com/theory.html)
* Configurable serial port to support connection of wireless adaptors.
The default baudrate is 250000. This baudrate has less jitter and hence errors than the usual 115200 baud, but is less supported by drivers and host-environments.
Differences and additions to the already good Sprinter firmware:
================================================================
*Look-ahead:*
Marlin has look-ahead. While sprinter has to break and re-accelerate at each corner,
lookahead will only decelerate and accelerate to a velocity,
so that the change in vectorial velocity magnitude is less than the xy_jerk_velocity.
This is only possible, if some future moves are already processed, hence the name.
It leads to less over-deposition at corners, especially at flat angles.
*Arc support:*
Slic3r can find curves that, although broken into segments, were ment to describe an arc.
Marlin is able to print those arcs. The advantage is the firmware can choose the resolution,
and can perform the arc with nearly constant velocity, resulting in a nice finish.
Also, less serial communication is needed.
*Temperature Oversampling:*
To reduce noise and make the PID-differential term more useful, 16 ADC conversion results are averaged.
*AutoTemp:*
If your gcode contains a wide spread of extruder velocities, or you realtime change the building speed, the temperature should be changed accordingly.
Usually, higher speed requires higher temperature.
This can now be performed by the AutoTemp function
By calling M109 S<mintemp> T<maxtemp> F<factor> you enter the autotemp mode.
You can leave it by calling M109 without any F.
If active, the maximal extruder stepper rate of all buffered moves will be calculated, and named "maxerate" [steps/sec].
The wanted temperature then will be set to t=tempmin+factor*maxerate, while being limited between tempmin and tempmax.
If the target temperature is set manually or by gcode to a value less then tempmin, it will be kept without change.
Ideally, your gcode can be completely free of temperature controls, apart from a M109 S T F in the start.gcode, and a M109 S0 in the end.gcode.
*EEPROM:*
If you know your PID values, the acceleration and max-velocities of your unique machine, you can set them, and finally store them in the EEPROM.
After each reboot, it will magically load them from EEPROM, independent what your Configuration.h says.
*LCD Menu:*
If your hardware supports it, you can build yourself a LCD-CardReader+Click+encoder combination. It will enable you to realtime tune temperatures,
accelerations, velocities, flow rates, select and print files from the SD card, preheat, disable the steppers, and do other fancy stuff.
One working hardware is documented here: http://www.thingiverse.com/thing:12663
Also, with just a 20x4 or 16x2 display, useful data is shown.
*SD card folders:*
If you have an SD card reader attached to your controller, also folders work now. Listing the files in pronterface will show "/path/subpath/file.g".
You can write to file in a subfolder by specifying a similar text using small letters in the path.
Also, backup copies of various operating systems are hidden, as well as files not ending with ".g".
*SD card folders:*
If you place a file auto[0-9].g into the root of the sd card, it will be automatically executed if you boot the printer. The same file will be executed by selecting "Autostart" from the menu.
First *0 will be performed, than *1 and so on. That way, you can heat up or even print automatically without user interaction.
*Endstop trigger reporting:*
If an endstop is hit while moving towards the endstop, the location at which the firmware thinks that the endstop was triggered is outputed on the serial port.
This is useful, because the user gets a warning message.
However, also tools like QTMarlin can use this for finding acceptable combinations of velocity+acceleration.
*Coding paradigm:*
Not relevant from a user side, but Marlin was split into thematic junks, and has tried to partially enforced private variables.
This is intended to make it clearer, what interacts which what, and leads to a higher level of modularization.
We think that this is a useful prestep for porting this firmware to e.g. an ARM platform in the future.
A lot of RAM (with enabled LCD ~2200 bytes) was saved by storing char []="some message" in Program memory.
In the serial communication, a #define based level of abstraction was enforced, so that it is clear that
some transfer is information (usually beginning with "echo:"), an error "error:", or just normal protocol,
necessary for backwards compatibility.
*Interrupt based temperature measurements:*
An interrupt is used to manage ADC conversions, and enforce checking for critical temperatures.
This leads to less blocking in the heater management routine.
Non-standard M-Codes, different to an old version of sprinter:
==============================================================
Movement:
* G2 - CW ARC
* G3 - CCW ARC
General:
* M17 - Enable/Power all stepper motors. Compatibility to ReplicatorG.
* M18 - Disable all stepper motors; same as M84.Compatibility to ReplicatorG.
* M30 - Print time since last M109 or SD card start to serial
* M42 - Change pin status via gcode
* M80 - Turn on Power Supply
* M81 - Turn off Power Supply
* M114 - Output current position to serial port
* M119 - Output Endstop status to serial port
Movement variables:
* M202 - Set max acceleration in units/s^2 for travel moves (M202 X1000 Y1000) Unused in Marlin!!
* M203 - Set maximum feedrate that your machine can sustain (M203 X200 Y200 Z300 E10000) in mm/sec
* M204 - Set default acceleration: S normal moves T filament only moves (M204 S3000 T7000) im mm/sec^2 also sets minimum segment time in ms (B20000) to prevent buffer underruns and M20 minimum feedrate
* M206 - set home offsets. This sets the X,Y,Z coordinates of the endstops (and is added to the {X,Y,Z}_HOME_POS configuration options (and is also added to the coordinates, if any, provided to G82, as with earlier firmware)
* M220 - set build speed mulitplying S:factor in percent ; aka "realtime tuneing in the gcode". So you can slow down if you have islands in one height-range, and speed up otherwise.
* M221 - set the extrude multiplying S:factor in percent
* M400 - Finish all buffered moves.
Temperature variables:
* M301 - Set PID parameters P I and D
* M302 - Allow cold extrudes
* M303 - PID relay autotune S<temperature> sets the target temperature. (default target temperature = 150C)
Advance:
* M200 - Set filament diameter for advance
* M205 - advanced settings: minimum travel speed S=while printing T=travel only, B=minimum segment time X= maximum xy jerk, Z=maximum Z jerk
EEPROM:
* M500 - stores paramters in EEPROM. This parameters are stored: axis_steps_per_unit, max_feedrate, max_acceleration ,acceleration,retract_acceleration,
minimumfeedrate,mintravelfeedrate,minsegmenttime, jerk velocities, PID
* M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
* M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to.
* M503 - print the current settings (from memory not from eeprom)
MISC:
* M240 - Trigger a camera to take a photograph
* M999 - Restart after being stopped by error
Configuring and compilation:
============================
Install the arduino software IDE/toolset v23 (Some configurations also work with 1.x.x)
http://www.arduino.cc/en/Main/Software
For gen6/gen7 and sanguinololu the Sanguino directory in the Marlin dir needs to be copied to the arduino environment.
copy ArduinoAddons\Arduino_x.x.x\sanguino <arduino home>\hardware\Sanguino
Install Ultimaker's RepG 25 build
http://software.ultimaker.com
For SD handling and as better substitute (apart from stl manipulation) download
the very nice Kliment's printrun/pronterface https://github.com/kliment/Printrun
Copy the Ultimaker Marlin firmware
https://github.com/ErikZalm/Marlin/tree/Marlin_v1
(Use the download button)
Start the arduino IDE.
Select Tools -> Board -> Arduino Mega 2560 or your microcontroller
Select the correct serial port in Tools ->Serial Port
Open Marlin.pde
Click the Verify/Compile button
Click the Upload button
If all goes well the firmware is uploading
Start Ultimaker's Custom RepG 25
Make sure Show Experimental Profiles is enabled in Preferences
Select Sprinter as the Driver
Press the Connect button.
KNOWN ISSUES: RepG will display: Unknown: marlin x.y.z
That's ok. Enjoy Silky Smooth Printing.
==========================
Marlin 3D Printer Firmware
==========================
Notes:
-----
The configuration is now split in two files:
Configuration.h for the normal settings
Configuration_adv.h for the advanced settings
Gen7T is not supported.
Quick Information
===================
This RepRap firmware is a mashup between <a href="https://github.com/kliment/Sprinter">Sprinter</a>, <a href="https://github.com/simen/grbl/tree">grbl</a> and many original parts.
Derived from Sprinter and Grbl by Erik van der Zalm.
Sprinters lead developers are Kliment and caru.
Grbls lead developer is Simen Svale Skogsrud. Sonney Jeon (Chamnit) improved some parts of grbl
A fork by bkubicek for the Ultimaker was merged, and further development was aided by him.
Some features have been added by:
Lampmaker, Bradley Feldman, and others...
Features:
* Interrupt based movement with real linear acceleration
* High steprate
* Look ahead (Keep the speed high when possible. High cornering speed)
* Interrupt based temperature protection
* preliminary support for Matthew Roberts advance algorithm
For more info see: http://reprap.org/pipermail/reprap-dev/2011-May/003323.html
* Full endstop support
* SD Card support
* SD Card folders (works in pronterface)
* SD Card autostart support
* LCD support (ideally 20x4)
* LCD menu system for autonomous SD card printing, controlled by an click-encoder.
* EEPROM storage of e.g. max-velocity, max-acceleration, and similar variables
* many small but handy things originating from bkubicek's fork.
* Arc support
* Temperature oversampling
* Dynamic Temperature setpointing aka "AutoTemp"
* Support for QTMarlin, a very beta GUI for PID-tuning and velocity-acceleration testing. https://github.com/bkubicek/QTMarlin
* Endstop trigger reporting to the host software.
* Updated sdcardlib
* Heater power reporting. Useful for PID monitoring.
* PID tuning
* CoreXY kinematics (www.corexy.com/theory.html)
* Configurable serial port to support connection of wireless adaptors.
* Automatic operation of extruder/cold-end cooling fans based on nozzle temperature
The default baudrate is 250000. This baudrate has less jitter and hence errors than the usual 115200 baud, but is less supported by drivers and host-environments.
Differences and additions to the already good Sprinter firmware:
================================================================
*Look-ahead:*
Marlin has look-ahead. While sprinter has to break and re-accelerate at each corner,
lookahead will only decelerate and accelerate to a velocity,
so that the change in vectorial velocity magnitude is less than the xy_jerk_velocity.
This is only possible, if some future moves are already processed, hence the name.
It leads to less over-deposition at corners, especially at flat angles.
*Arc support:*
Slic3r can find curves that, although broken into segments, were ment to describe an arc.
Marlin is able to print those arcs. The advantage is the firmware can choose the resolution,
and can perform the arc with nearly constant velocity, resulting in a nice finish.
Also, less serial communication is needed.
*Temperature Oversampling:*
To reduce noise and make the PID-differential term more useful, 16 ADC conversion results are averaged.
*AutoTemp:*
If your gcode contains a wide spread of extruder velocities, or you realtime change the building speed, the temperature should be changed accordingly.
Usually, higher speed requires higher temperature.
This can now be performed by the AutoTemp function
By calling M109 S<mintemp> T<maxtemp> F<factor> you enter the autotemp mode.
You can leave it by calling M109 without any F.
If active, the maximal extruder stepper rate of all buffered moves will be calculated, and named "maxerate" [steps/sec].
The wanted temperature then will be set to t=tempmin+factor*maxerate, while being limited between tempmin and tempmax.
If the target temperature is set manually or by gcode to a value less then tempmin, it will be kept without change.
Ideally, your gcode can be completely free of temperature controls, apart from a M109 S T F in the start.gcode, and a M109 S0 in the end.gcode.
*EEPROM:*
If you know your PID values, the acceleration and max-velocities of your unique machine, you can set them, and finally store them in the EEPROM.
After each reboot, it will magically load them from EEPROM, independent what your Configuration.h says.
*LCD Menu:*
If your hardware supports it, you can build yourself a LCD-CardReader+Click+encoder combination. It will enable you to realtime tune temperatures,
accelerations, velocities, flow rates, select and print files from the SD card, preheat, disable the steppers, and do other fancy stuff.
One working hardware is documented here: http://www.thingiverse.com/thing:12663
Also, with just a 20x4 or 16x2 display, useful data is shown.
*SD card folders:*
If you have an SD card reader attached to your controller, also folders work now. Listing the files in pronterface will show "/path/subpath/file.g".
You can write to file in a subfolder by specifying a similar text using small letters in the path.
Also, backup copies of various operating systems are hidden, as well as files not ending with ".g".
*SD card folders:*
If you place a file auto[0-9].g into the root of the sd card, it will be automatically executed if you boot the printer. The same file will be executed by selecting "Autostart" from the menu.
First *0 will be performed, than *1 and so on. That way, you can heat up or even print automatically without user interaction.
*Endstop trigger reporting:*
If an endstop is hit while moving towards the endstop, the location at which the firmware thinks that the endstop was triggered is outputed on the serial port.
This is useful, because the user gets a warning message.
However, also tools like QTMarlin can use this for finding acceptable combinations of velocity+acceleration.
*Coding paradigm:*
Not relevant from a user side, but Marlin was split into thematic junks, and has tried to partially enforced private variables.
This is intended to make it clearer, what interacts which what, and leads to a higher level of modularization.
We think that this is a useful prestep for porting this firmware to e.g. an ARM platform in the future.
A lot of RAM (with enabled LCD ~2200 bytes) was saved by storing char []="some message" in Program memory.
In the serial communication, a #define based level of abstraction was enforced, so that it is clear that
some transfer is information (usually beginning with "echo:"), an error "error:", or just normal protocol,
necessary for backwards compatibility.
*Interrupt based temperature measurements:*
An interrupt is used to manage ADC conversions, and enforce checking for critical temperatures.
This leads to less blocking in the heater management routine.
Non-standard M-Codes, different to an old version of sprinter:
==============================================================
Movement:
* G2 - CW ARC
* G3 - CCW ARC
General:
* M17 - Enable/Power all stepper motors. Compatibility to ReplicatorG.
* M18 - Disable all stepper motors; same as M84.Compatibility to ReplicatorG.
* M30 - Print time since last M109 or SD card start to serial
* M42 - Change pin status via gcode
* M80 - Turn on Power Supply
* M81 - Turn off Power Supply
* M114 - Output current position to serial port
* M119 - Output Endstop status to serial port
Movement variables:
* M202 - Set max acceleration in units/s^2 for travel moves (M202 X1000 Y1000) Unused in Marlin!!
* M203 - Set maximum feedrate that your machine can sustain (M203 X200 Y200 Z300 E10000) in mm/sec
* M204 - Set default acceleration: S normal moves T filament only moves (M204 S3000 T7000) im mm/sec^2 also sets minimum segment time in ms (B20000) to prevent buffer underruns and M20 minimum feedrate
* M206 - set home offsets. This sets the X,Y,Z coordinates of the endstops (and is added to the {X,Y,Z}_HOME_POS configuration options (and is also added to the coordinates, if any, provided to G82, as with earlier firmware)
* M220 - set build speed mulitplying S:factor in percent ; aka "realtime tuneing in the gcode". So you can slow down if you have islands in one height-range, and speed up otherwise.
* M221 - set the extrude multiplying S:factor in percent
* M400 - Finish all buffered moves.
Temperature variables:
* M301 - Set PID parameters P I and D
* M302 - Allow cold extrudes
* M303 - PID relay autotune S<temperature> sets the target temperature. (default target temperature = 150C)
Advance:
* M200 - Set filament diameter for advance
* M205 - advanced settings: minimum travel speed S=while printing T=travel only, B=minimum segment time X= maximum xy jerk, Z=maximum Z jerk
EEPROM:
* M500 - stores paramters in EEPROM. This parameters are stored: axis_steps_per_unit, max_feedrate, max_acceleration ,acceleration,retract_acceleration,
minimumfeedrate,mintravelfeedrate,minsegmenttime, jerk velocities, PID
* M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily).
* M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to.
* M503 - print the current settings (from memory not from eeprom)
MISC:
* M240 - Trigger a camera to take a photograph
* M999 - Restart after being stopped by error
Configuring and compilation:
============================
Install the arduino software IDE/toolset v23 (Some configurations also work with 1.x.x)
http://www.arduino.cc/en/Main/Software
For gen6/gen7 and sanguinololu the Sanguino directory in the Marlin dir needs to be copied to the arduino environment.
copy ArduinoAddons\Arduino_x.x.x\sanguino <arduino home>\hardware\Sanguino
Install Ultimaker's RepG 25 build
http://software.ultimaker.com
For SD handling and as better substitute (apart from stl manipulation) download
the very nice Kliment's printrun/pronterface https://github.com/kliment/Printrun
Copy the Ultimaker Marlin firmware
https://github.com/ErikZalm/Marlin/tree/Marlin_v1
(Use the download button)
Start the arduino IDE.
Select Tools -> Board -> Arduino Mega 2560 or your microcontroller
Select the correct serial port in Tools ->Serial Port
Open Marlin.pde
Click the Verify/Compile button
Click the Upload button
If all goes well the firmware is uploading
Start Ultimaker's Custom RepG 25
Make sure Show Experimental Profiles is enabled in Preferences
Select Sprinter as the Driver
Press the Connect button.
KNOWN ISSUES: RepG will display: Unknown: marlin x.y.z
That's ok. Enjoy Silky Smooth Printing.