Dual extruder orbiterv2
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Hello to all
I would like to connect 2 orbiter extruders to my Railcore 3D printer. Can anyone do this or help me with the different firmware configurations? -
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The objective being to pass 2 filaments of 1.75 simultaneously thanks to 2 extruders in order to obtain a high output from the nozzle and gain in printing time.
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undefined droftarts referenced this topic
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The aim is to pass two different coloured filaments through the machine, in order to obtain a result with a mixture of the two colours.
Is it possible ? -
@ronaldo Define the additional extruder motor, and create a tool definition which includes both extruder motors. You can also define tools with each extruder individually, so that you can run them with different filaments.
To define the additional extruder motor and add it to tools:
- add M569 for the driver, and add the new extruder to M584: for examples see https://docs.duet3d.com/User_manual/Machine_configuration/Configuration_cartesian#drives
- define microstepping, steps per mm, speeds and accelerations for the additional extruder: see 'Multiple extruder example' tab under https://docs.duet3d.com/User_manual/Machine_configuration/Configuration_cartesian#motor-speeds-and-accelerations
- define a tool that uses both extruders: see 'Multiple tools' and 'mixing hot ends' tabs under https://docs.duet3d.com/User_manual/Machine_configuration/Configuration_cartesian#tool-definition-section
- set the tool mixing ratio with M567: see https://docs.duet3d.com/en/User_manual/Reference/Gcodes/M567
Ian
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Thank you for the documentation. I will look into it if I have any questions, I will come back.
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@ronaldo said in Dual extruder orbiterv2:
thanks to 2 extruders in order to obtain a high output from the nozzle and gain in printing time.
I wonder if it would work that way?
A single extruder can produce a certain chamber pressure before it skips steps. Adding a second extruder will not increase the pressure; the stronger motor will win, the other will skip...Some people use two extruders one ONE filament. One as remote Bowden setup, the other as direct drive.
That's better IMHO.Having two parallel filament path's only helps when the hotend uses a huge nozzle diameter and one extruder can't deliver fast enough...
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@o_lampe Ok
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@o_lampe said in Dual extruder orbiterv2:
Having two parallel filament path's only helps when the hotend uses a huge nozzle diameter and one extruder can't deliver fast enough...
That kind of depends........If the filament path extends such that you have two or more parallel melt chambers, then you effectively double the melt chamber surface area and hence the volumetric melt rate potential. And two extruders would run at half the speed of a single extruder, all of which can be beneficial for higher speed printing, even with smaller nozzles. At least that's what I found with all my various multi-input hot end designs........
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@deckingman That's right. IIRC your melt chambers were connected through narrow channels which reduce the back-pressure effect. I guess the 'E3D cyclops' works the same . But a 'Diamond'-style hotend would have only one melt chamber....
As you wrote" It depends" -
@o_lampe said in Dual extruder orbiterv2:
@deckingman That's right. IIRC your melt chambers were connected through narrow channels which reduce the back-pressure effect. I guess the 'E3D cyclops' works the same . But a 'Diamond'-style hotend would have only one melt chamber....
As you wrote" It depends"No, actually a Diamond also has multiple melt chambers. The brass cone sits below the heat breaks so anything inside that cone becomes molten and remains molten when the filaments are combined just before the nozzle tip. If you set the mixing ratio to equal percentages for each input, then each individual filament travels at a correspondingly lower speed (so 33% for 3 input Diamond and 20% for a 5 input). So not only do you have a greater surface are over which to conduct heat, but each filament spends longer in each melt chamber before it exits the nozzle. The net result is a vastly increased melt rate.
