incorrect print speeds



  • homex.g anyone have any ideas to why my cura profile that worked just fine before i changed boards, now only prints about half the speed that i program it to. i cant tell the difference between the g code for homing axis(generated by reprap config) and printing my benchy(sliced in cura). but homing axis moves so much faster dispite the same f value in both codes. i did change the flavor to reprap from marlin but that didnt change much. like i will program a part for 30 mm/s and it will show in the dwc that im only requesting 10 at most. i do program cncs for a living so i know a bit about g codes but these are completely different than what we use so id appreciate some help. these are both the g code files. just the skirt for the benchy but its doing the same thing. the retration is ridicoulously slow and the movements x and
    y dont move more than 15mm/s at any time. CE3_3DBenchy.gcode [0_1588715612104_config.zip](Uploading 100%)


  • administrators

    These lines in your GCode file are the problem:

    M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration
    M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate

    The M203 command specifies a maximum speed of 500mm/minute. Slicers should not generate M201 and M203 commands. They are intended to be machine limits, not specific to any print job.


  • Moderator

    It's in your Cura start gcode. The printer profile you loaded had it probably expecting marlin.

    Remove these sections:

    M201 X500.00 Y500.00 Z100.00 E5000.00 ;Setup machine max acceleration
    M203 X500.00 Y500.00 Z10.00 E50.00 ;Setup machine max feedrate
    M204 P500.00 R1000.00 T500.00 ;Setup Print/Retract/Travel acceleration
    M205 X8.00 Y8.00 Z0.40 E5.00 ;Setup Jerk
    

    Also, looks like you're using a pretty old Cura version. Might want to update to 4.6.1


  • Moderator

    @dc42 said in incorrect print speeds:

    Slicers should not generate M201 and M203 commands.

    It's not necessarily Cura that generates it. It's in the printer profiles start gcode which even when built into Cura by default are community submitted.



  • @dc42 Is it okay for slicers to insert M204 commands? As in, to change the print acceleration or travel acceleration based on the feature type. Does RRF respond well to that, or is it better to choose one value and stick to it for a print job?


  • Moderator

    @bot I use that feature of Cura all the time and it seems to respond fine, for what it's worth.



  • awesome thanks guys. i know where to edit all that ill get to it today and see if it works. but that seems like the only other place i havent looked thanks for the help.


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