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Filament Change

Posted by stevep12 
Filament Change
January 11, 2017 06:11AM
Hello All, Has any one enabled the filament change option using a REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER ??
I have uncommented the line as required in marlin but the option is not on my Lcd controller, any advice would be appreciated ....stevep
Re: Filament Change
January 12, 2017 10:13AM
Yeah. Marlin, you mean?

Filament change is not very well documented.

The command shows when printing, at the bottom of the 'tune' menu.

I did this. Not saying its right but it worked for me.


// Add support for experimental filament exchange support M600; requires display
//#ifdef ULTIPANEL ------------ I added the // comments to the start to make it not a condition
#define FILAMENTCHANGEENABLE --------------- I removed the // comments to enable it
#define FILAMENTCHANGE_FIRSTRETRACT -4 --------------was -2 but I needed -4 to take the pressure out of bowden
#define FILAMENTCHANGE_FINALRETRACT 4 --------------was -100 but I just pull the filament out by hand. Sometimes I don't change filament just want to pause with the head out of the way so 4 returns the filament where it started
// #define AUTO_FILAMENT_CHANGE //This extrude filament until you press the button on LCD
// #define AUTO_FILAMENT_CHANGE_LENGTH 0.04 //Extrusion length on automatic extrusion loop

I got compiling faults with "extrude_min_temp" error in marlin main.cpp when I did this
so as a bodge, in

Marlin main.cpp

inline void gcode_M600() {

//if (degHotend(active_extruder) < extrude_min_temp) {
// return;
// }

Comments// added.

Re: Filament Change
January 13, 2017 10:06AM
Thank you for the Info , i will let you know if It works........Regards.......stevep
Re: Filament Change
January 14, 2017 09:13AM
still no option on the LCD....
Re: Filament Change
January 16, 2017 08:59AM
Only after a print started, right at the bottom of the 'Tune' menu?


Re: Filament Change
January 18, 2017 02:51PM
Still nothing, I will need to look into it further !!!!
Re: Filament Change
January 19, 2017 02:31AM
How annoying.

I checked again and the above are the only changes I made. That worked for 1.0.3 and 1.1.06.

Good luck with it. It is useful.
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