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cura 3.6 and robo r1+ start g codes

Discussion in 'General Questions' started by fredm, Jan 15, 2019.

  1. fredm

    fredm Member

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    I tried using cura 3.6 to slice a vase that cura 15 couldnt.


    but it would start to print in mid air without going through the bed level sequence.

    I noticed it didnt have a g28 command . so I added it.
    then it ran the the bed level sequence moving the nozzle away from the bed,

    then I tried to start over coping the matter control gcode (that I know works). but that caused problems with the temp. the bed temp went up. then the extruder temp went up after that (instead of simultaneously) . then the temp started drooping for no apparent reason.

    so , does anyone here use cura 3.6 and have a working start gcode?


    this is what showed up by default
    G29 E0
    M565 Z-1
    G1 Z5 F5000
    G29

    This is the matter control start g code that works on the older version of matter control
    g28 xo yo zo
    g1 z5 f5000
    m109 s{temperature}
    g28 x0 y0 z0
    g29
     
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    That is missing a G28 before the G29
    Change it to:
    G28;
    M565 Z-1;
    G1 Z5 F5000;
    G29;

    and it should be better
     
  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Also, just so you know, GCode is actually case sensitive so always use uppercase (even if you think the printer is smart enough to convert it)
     
  4. fredm

    fredm Member

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    I did add the g28. But bed leveling sequence raised the nozzle.
    This is just go worse the more I tried to fix it.
    Yes I know case sensitive. Just got lazy writing gcode
     
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    If the nozzle only goes up then it is usually a Z switch issue. If one of them is false reporting it will only go up :)
     
    Geof likes this.
  6. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
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    Geof likes this.
  7. Geof

    Geof Volunteer Moderator
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    3rd that :p
     
  8. fredm

    fredm Member

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    then why does everything work when I use cure 15.4.06 or matter control
    I copied and pasted the same start gcode into cura2 to make sure I wasnt making any mistakes.
     
  9. fredm

    fredm Member

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    okay now I cant move the extruder down only up.
    and its high off the build plate.

    so I guess I do have a problem with the Z limit no working correctly.
    I saw a gap in the z limit switch. thanks for telling about that.
    turned the lead screws not I can get the extrtuder to go down.

    but still have a problem with the start g code. as copied from cura 15.04.06.

    when used in the new cura it starts from the middle then goes off beyond the y and x limit switched.
     
    #9 fredm, Jan 19, 2019
    Last edited: Jan 19, 2019
  10. fredm

    fredm Member

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    i ended up using this gcode from matter control
    G28 X0 Y0 Z0 ; home all axis
    G1 Z5 F5000 ; lift nozzle
    G28 X0 Y0 Z0 ; home Z again
    G29 ; probe the bed


    there was
    M109 S [temperature]
    But it cause the extruder temp to turn off.
    so I deleted that
     
  11. fredm

    fredm Member

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    i didnt see the
    M565 Z-1.0 define Z offset at 1.0mm
    in the mattercontrol start g code

    is that recommended
     
  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Required if you want the autoleveling to properly account for the Z offset used in the leveling.
    It is NOT global Z offset, but a number that gets used in the calculations Marlin does for the level plane it is generating.

    You tweak the -1.0 mm number up or down (in small increments like 0.1 and MORE negative is further from the bed and less negative is closer to the bed) until your first layer looks linke this:

    https://printedsolid.com/blogs/news/tagged/first-layer
     
  13. fredm

    fredm Member

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    although the above g code worked on both cura 15.04.06 and 3.6.
    after the auto level 3.6 wanted to go off beyond the home point.
    but 15.04.06 stayed in the center.they were both in the center of the build plate before slicing.

    am I th eonly one have problems with cura 3.6?
     

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