On a side note, I have successfully printed flexible filament with both stock and tough
extruders through the stock bowden tube, and I therefore did not envisaged to mount
the tough extruder as direct extruder, while it is possible to do so. I preferred to leave
the print head light and maintain the good print quality achieved at this stage.
Finally, the firmware of the printer has to be adjusted again in order to accommodate
with the new gear ratio of the extruder. The lines to add to the “Configuration.h” file
listed earlier in this document are the following:
#define TITAN_EXTRUDER
#define TITAN_EXTRUDER_STEPS 415 // set to 463 for others
You can just flash at this point or you can also optionally change the manual feed
rate of your extruder in “Configuration_adv.h” file. The default configuration is:
#if ENABLED(ULTIPANEL)
#define MANUAL_FEEDRATE {70*60, 70*60, 4*60, 60}
The last value is manual feed rate of the extruder when using the LCD panel to move
the filament. The extruder is capable of higher speed, and has a safety check to
prevent cold extrusion. This value can only be changed with a re-upload of the
firmware.
In the same spirit, values for the scripted filament change (gcode M600) can be
adjusted to your new extruder. Here are the default values in Configuration_adv.h:
#define ADVANCED_PAUSE_FEATURE
#if ENABLED(ADVANCED_PAUSE_FEATURE)
#define PAUSE_PARK_RETRACT_FEEDRATE 60
#define PAUSE_PARK_RETRACT_LENGTH 2
#define FILAMENT_CHANGE_UNLOAD_FEEDRATE 10
#define FILAMENT_CHANGE_UNLOAD_ACCEL 25
#if ENABLED(DIRECT_DRIVE_PRINTER)
#define FILAMENT_CHANGE_UNLOAD_LENGTH 20
#else
#define FILAMENT_CHANGE_UNLOAD_LENGTH 100
#endif
#define FILAMENT_CHANGE_SLOW_LOAD_FEEDRATE 6
#define FILAMENT_CHANGE_SLOW_LOAD_LENGTH 0
#define FILAMENT_CHANGE_FAST_LOAD_FEEDRATE 6
#define FILAMENT_CHANGE_FAST_LOAD_ACCEL 25
#define FILAMENT_CHANGE_FAST_LOAD_LENGTH 0
#define ADVANCED_PAUSE_PURGE_FEEDRATE 3
#define ADVANCED_PAUSE_PURGE_LENGTH 50
#define FILAMENT_UNLOAD_RETRACT_LENGTH 13
#define FILAMENT_UNLOAD_DELAY 2000
#define FILAMENT_UNLOAD_PURGE_LENGTH 8
#define PAUSE_PARK_NOZZLE_TIMEOUT 60
#define FILAMENT_CHANGE_ALERT_BEEPS 10
#define PAUSE_PARK_NO_STEPPER_TIMEOUT
#define PARK_HEAD_ON_PAUSE
#endif
Compile, upload, and you’re good to go!
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