Dual printhead that can print at the same time?:( Hi guys, sorry to bring up this dual printhead problem again. Currently I have a prusa i3 printer and I am suppose to use extruder 1 and 2 at the same time to mix the content together while printing. I am wondering is it allowed in marlin firmware? I have changed the setting to #define MOTHERBOARD 34 and defined 2 printhead in configuration.h. Any more modifications I should do to the firmware?I am considering using a Y shape nozzle so I don't need to do printhead offset. I read that marlin do not support mixing ratio M code How should I modify the G code accordingly? Thanks ahead. https://reprap.org/forum/read.php?406,572835,572835#msg-572835 Wed, 15 Jul 2026 16:22:39 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?406,572835,576350#msg-576350 Re: Dual printhead that can print at the same time?:( https://reprap.org/forum/read.php?406,572835,576350#msg-576350
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sarf2k4
Yes, because you already have them. I do remember that there were posts by richard himself modifying code or something by using 0-360' degree angle (I forgot). There's also colour mixing thread in reprap forum here, try googling "richrap colour mixing"

Hi, so after some digging up, I changed the firmware to reprap v92. They mention v92 supports color mixing M code: M163: Set weight of mixed material and M164: Store weights.
But I really can't find an example of how to use them in a g code and the mixing theory (https://github.com/repetier/Repetier-Firmware/blob/work092/doc/Mixing%20extruder%20theory.txt) really confuses me...]]> kurosame Prusa i3 and variants Wed, 28 Oct 2015 00:54:39 -0400 https://reprap.org/forum/read.php?406,572835,573032#msg-573032 Re: Dual printhead that can print at the same time?:( https://reprap.org/forum/read.php?406,572835,573032#msg-573032 sarf2k4 Prusa i3 and variants Tue, 20 Oct 2015 09:25:04 -0400 https://reprap.org/forum/read.php?406,572835,572926#msg-572926 Re: Dual printhead that can print at the same time?:( https://reprap.org/forum/read.php?406,572835,572926#msg-572926
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sarf2k4
Basically you wanted to have colour mixing feature, can try to start from here, [richrap.blogspot.my] a project back in 2012

Thank you I will take a look. Actually I only need to know the code and firmware modification part. I am not designing the printhead]]> kurosame Prusa i3 and variants Tue, 20 Oct 2015 05:22:36 -0400 https://reprap.org/forum/read.php?406,572835,572925#msg-572925 Re: Dual printhead that can print at the same time?:( https://reprap.org/forum/read.php?406,572835,572925#msg-572925
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o_lampe
You have a slicer that has a color mixing option and generates the gcode accordingly? Can you attach an example? What sort of .stl file do you need?

Then you'd write an addition in marlin_main code, that filters out this M code and translates it to E0, E1 steps and send it to the planner ( like usual ).
-Olaf

I am totally new to 3D printing.. currently using an prusa i3 with Arduino mega 2560 and have slic3r-mswin-x64-1-2-9a-stable, reptier host and printrun in my PC. Not sure which one is useful
I don't have a existing file yet, say if I want to print a simple straight line of 10mm, both extruder extruding materials onto the plate according to any ratio I want. What will be the g code modification? Is this possible to be done with gcode modification only? cause I really don't know how to add the M code in marlin...]]> kurosame Prusa i3 and variants Tue, 20 Oct 2015 05:21:25 -0400 https://reprap.org/forum/read.php?406,572835,572912#msg-572912 Re: Dual printhead that can print at the same time?:( https://reprap.org/forum/read.php?406,572835,572912#msg-572912 richrap.blogspot.my] a project back in 2012]]> sarf2k4 Prusa i3 and variants Tue, 20 Oct 2015 04:56:52 -0400 https://reprap.org/forum/read.php?406,572835,572903#msg-572903 Re: Dual printhead that can print at the same time?:( https://reprap.org/forum/read.php?406,572835,572903#msg-572903
Then you'd write an addition in marlin_main code, that filters out this M code and translates it to E0, E1 steps and send it to the planner ( like usual ).
-Olaf]]> o_lampe Prusa i3 and variants Tue, 20 Oct 2015 04:31:50 -0400 https://reprap.org/forum/read.php?406,572835,572835#msg-572835 Dual printhead that can print at the same time?:( https://reprap.org/forum/read.php?406,572835,572835#msg-572835 I read that marlin do not support mixing ratio M code How should I modify the G code accordingly?
Thanks ahead.]]> kurosame Prusa i3 and variants Tue, 20 Oct 2015 00:28:10 -0400