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Posted · Cura with BFB printers

I was able to configure Cura to work with a single extruder ( BFB 3000) .

The problem starts when printing on two extruders .

BFB 3000 using the command :

M104 extruder temperature 1

M204 extruder temperature 2

M101 enable the first extruder

M201 inclusion of a second extruder

M108 RPM setting for the first extruder

M208 RPM setting for the second extruder

Where can I change to Cura generate commands for the second extruder M201 , M208 instead of M101 , M108 ?

 

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    Posted · Cura with BFB printers

    yellowshark, there can not be set because this command M101 / M201 and M108 / M208 are in the code many times:

     


    ;TYPE:SUPPORT
    M108 S445.6
    M101
    G1 X14.939 Y15.219 Z0.300 F1500.0
    G1 X-15.060 Y15.219 Z0.300 F1500.0
    G1 X-15.060 Y-14.780 Z0.300 F1500.0
    G1 X14.939 Y-14.780 Z0.300 F1500.0
    M103
    G1 X13.500 Y-14.885 Z0.300 F3000.0
    M101
    G1 X13.500 Y15.324 Z0.300 F1500.0
    M103
    G1 X10.500 Y15.324 Z0.300 F3000.0
    M101
    G1 X10.500 Y-14.885 Z0.300 F1500.0
    M103
    G1 X7.500 Y-14.885 Z0.300 F3000.0
    M101
    G1 X7.500 Y15.324 Z0.300 F1500.0
    M103
    G1 X4.500 Y15.324 Z0.300 F3000.0
    M101
    G1 X4.500 Y-14.885 Z0.300 F1500.0
    M103
    G1 X1.500 Y-14.885 Z0.300 F3000.0
    M101
    G1 X1.500 Y15.324 Z0.300 F1500.0
    M103
    G1 X-1.500 Y15.324 Z0.300 F3000.0
    M101
    G1 X-1.500 Y-14.885 Z0.300 F1500.0
    M103
    G1 X-4.500 Y-14.885 Z0.300 F3000.0

    When I type something in addition to preswitchextruder and postswitchextruder Cura does not add this to the code. When I change the code in a file .bfb and I will add the command to change the extruder for the second, further change over all commands M101 , M108 to M201 , M208 - Bfbf 3000 runs on two extruders good. Is it possible to expand Cura to generate a command for the second extruder?

     

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    Posted · Cura with BFB printers

    You can write a plugin that uses a regex to change the gcodes. I've worked with tinyG once, which uses simmilar commands which needed to be ported.

    Also, the ultimaker uses G109 for temperature. I believe you can add a T0 or T1 parameter to indicate which head needs to be heated.

     

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    Posted · Cura with BFB printers

    My problem is that I do not get the settings for the first extruder. Always appears error in line ...

    What is the Star.Gcode and End.Gcode in CURA that allows printing with an extruder.?

     

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    Posted (edited) · Cura with BFB printers
    My problem is that I do not get the settings for the first extruder. Always appears error in line ...

    What is the Star.Gcode and End.Gcode in CURA that allows printing with an extruder.?

    For the start code, I changed it for something that my printer was using:

    ^Firmware:V1.07

    ^Checksum: NO

    G21

    G90

    # Select Extruder 1

    M104 S{print_temperature} P1

    M542

    M551 P51 S150.000

    M227 P51 S80

    M228 P0 S51

    M543

    Also I have to remove an other line in the file that generate a big clump of plastic before the beginnig of the parts, the line is:

    ;enable auto-retraction

    M227 S11520 P11520

    Edited by Guest
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    Posted (edited) · Cura with BFB printers

    If you go to Expert > select "Full setting"

    go to "Start/End-GCode"

    then you have "Preswitch Extruder" and "Post switch Extruder"

    The code is to be added, I am going to run a file with my printer slicer and try to see what is supposed to be added.

    Edited by Guest
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    Posted · Cura with BFB printers
    If you go to Expert > select "Full setting"

    go to "Start/End-GCode"

    then you have "Preswitch Extruder" and "Post switch Extruder"

    The code is to be added, I am going to run a file with my printer slicer and try to see what is supposed to be added.

    But I realized that this option just let us add something before switching, but it does not change every M101 for M201 for the second extruder and every M108 S(extruder speed) need also to be replace by M208 S(Extruder 2 speed)

    The M103 stays the same for any extruders, since it mean turn off all extruders

    I would need some help for that I can not change the software code by myself.

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    Posted · Cura with BFB printers

    today I ran into the same issue. Do you have any news about it?

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    Posted · Cura with BFB printers

    I looked today Cura source , I found something like this:

     

       if (flavor == GCODE_FLAVOR_BFB)   {       //For Bits From Bytes machines, we need to handle this completely differently. As they do not use E values but RPM values.       float fspeed = speed * 60;       float rpm = extrusion_per_mm * speed * 60;       const float mm_per_rpm = 4.0; //All BFB machines have 4mm per RPM extrusion.       rpm /= mm_per_rpm;       if (rpm > 0)       {           if (isRetracted)           {               if (currentSpeed != int(rpm * 10))               {                   //fprintf(f, "; %f e-per-mm %d mm-width %d mm/s\n", extrusion_per_mm, lineWidth, speed);                   //fprintf(f, "M108 S%0.1f\r\n", rpm);                   *output_stream << "M108 S" << std::setprecision(1) << rpm << "\r\n";                   currentSpeed = int(rpm * 10);               }               //Add M101 or M201 to enable the proper extruder.               *output_stream << "M" << int((extruderNr + 1) * 100 + 1) << "\r\n";               isRetracted = false;

     

    In the file :

    CuraEngine/src/gcodeExport.cpp

    Looking at the code Cura has a division at M101 , M201 . Is it possible to add M208 ? I still do not know how to start " preSwitchExtruder.gcode " when I add there a command Cura does not add it to gcode what could be causing this?

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    Posted · Cura with BFB printers

    ok, I stopped using cura for the bfb-3000 because it is too extensive to get it running with multiple extruders - it is not worth the effort I am afraid.

    good luck :)

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    Posted · Cura with BFB printers

    So what program are you using? I compared prints with Cura and Axon , Cura is doing much better. You could write what you use, and send some profiles?

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    Posted · Cura with BFB printers

    The problem is not so much with your BFB printer, as it is with Cura. Cura just doesn't fully support multiple extruders yet. This will all change in a couple of months, though! :D

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    Posted · Cura with BFB printers

    I'm having trouble configuring the bfb 3000 to work with Cura. It has a dual extruder, but I only need to print on one single extruder.

    Any chance you could post your .ini file, or start/end GCode?

    Thanks!

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