Jump to content

Arrrrrgghhhh it almost printed it !!! HELP!!!


Recommended Posts

Posted · Arrrrrgghhhh it almost printed it !!! HELP!!!

Oh and about the different slicers.  I thought I answered that one.  It's really really complicated.  There are dozens of parameters that if you change will make almost no difference in your print but will cause the printer to experience much higher accelerations.  Higher accelerations means a loose pulley is more likely to slip on the shaft.  In both cura and s3d.

 

For example if you print a cube with rounded corners and there are 20 points representing a 1mm curve at a corner.  Some slicers will put all 20 points into the gcode which will bring the printer almost to a stop and you get lower accelerations.  Some slicers (cura) will remove some of those points if they are closer than a certain tolerance (there is a setting) and the printer won't slow down so much on the corner.  This is not the best example.  

 

Plus Marlin (the UM firmware) has some bugs where it accelerates more than desired.  I mean you know it's a bit of a hack just by the fact it has 2 (TWO!) max acceleration values.  Typically most UM printers have one set to 5000mm/sec/sec and the other is 9000mm/sec/sec.  Why does it need 2?   It tries to stick to the lower value but sometimes the planner exceeds the lower value but then it truly promises not to exceed the second value?  Why?  It's complicated.  Again - spend 10 hours reading the code if you really want to know.  Just the path planner code - not all of Marlin.

 

Don't worry about the slicers.  The slicers are fine.  Fix the printer.

  • Link to post
    Share on other sites

    Posted · Arrrrrgghhhh it almost printed it !!! HELP!!!
    17 hours ago, CostumeBiz said:

    M907 E1400 ; increase extruder current

    G28 ; home all axes

    G1 X20 Y10 F3000 ; bring extruder to front

    G92 E0 ; zero the extruded length

    G1 Z10 ; lower

    G1 E19 F200 ; purge nozzle quickly

    G1 E26 F60 ; purge nozzle slowly

    G92 E0 ; zero the extruded length again

    G1 E-5.5 F400 ; retract

    G1 X190 Z0 F9000 ; pull away filament

    G1 X210 F9000 ; wipe

    G1 Y20 F9000 ; wipe

    G1 E0 ; feed filament back

     

    Here's the starting script from Simplify3D

     

    I recommend to remove the first line (M907) as soon as possible. This command increases the motor current for the extruder motor to 1400mA - that's too much and asks for trouble...

    (i think the topic "overheating of stepper drivers" was already mentioned). It's only changed for the e-axis - but who knows....?

    The default is 1250mA (or 1200?) - i use 1100mA for years without problems.

    For older versions of S3D this was the standard script, but newer versions do not longer add this line to the start script (AFAIK).

  • Link to post
    Share on other sites

    Posted · Arrrrrgghhhh it almost printed it !!! HELP!!!

    So I should paste this script into S3D?

     

     

    AFAIK

    G28 ; home all axes

    G1 X20 Y10 F3000 ; bring extruder to front

    G92 E0 ; zero the extruded length

    G1 Z10 ; lower

    G1 E19 F200 ; purge nozzle quickly

    G1 E26 F60 ; purge nozzle slowly

    G92 E0 ; zero the extruded length again

    G1 E-5.5 F400 ; retract

    G1 X190 Z0 F9000 ; pull away filament

    G1 X210 F9000 ; wipe

    G1 Y20 F9000 ; wipe

    G1 E0 ; feed filament back

     

     

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • Introducing Universal Cura Projects in the UltiMaker Cura 5.7 beta
        Strap in for the first Cura release of 2024! This 5.7 beta release brings new material profiles as well as cloud printing for Method series printers, and introduces a powerful new way of sharing print settings using printer-agnostic project files! Also, if you want to download the cute dinosaur card holder featured below, it was specially designed for this release and can be found on Thingiverse! 
          • Like
        • 10 replies
      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
         
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
    ×
    ×
    • Create New...