Jump to content
Ultimaker Community of 3D Printing Experts

Learn to write post processing script


Recommended Posts

Posted · Learn to write post processing script

I am interested in learning how to write a script for post processing gcode and then implementing it into Cura. 
 

Can anyone recommend any good resources or examples to review that are specific to this?

 

I know there is probably plenty online about script writing in general, but given the wide spread application I’d like to avoid picking up a degree just to do what I want.

 

Reason being, I have just build my first IDEX printer, and having a fleet of Ultimakers, I am an avid Cura user. But the way Cura handles certain things in relation to tool changes, is just not very smart/efficient.

 

a couple of thing I would like to do with a script:

 

1) edit the extruder 1 + 2 start gcode the first time it’s used in the gcode.

 

2) Remove every second M109 command after every T0/T1 command

 

3) Increase the feedrate for the first G0 move after every T0/T1 command

  • Link to post
    Share on other sites
    Posted · Learn to write post processing script

    I'm a self-taught Visual Basic coder.  Unfortunately for me, knowing VB in the Cura world is like knowing Latin.  It's not real helpful.  Moving from my very dated knowledge of "Visual Basic for Applications" to "VB.Net" and Visual Studio was enough of a problem.  I have created a modest little Windows app (Greg's Toolbox) that among other things will switch between, and control, up to 10 printers.

     

    Reviewing some post-processing plugins (PauseAtHeight.py and SearchAndReplace.py in particular) helped me to understand a bit about how they work to find something in the gcode stream, and then to insert new code.  It gave me just enough of an understanding of Python for me to customize them to suit my needs.  For myself and what I do, writing post-processors in VB.Net didn't require any knowledge of Python or Cura as I just deal with gcode files after they are generated.  Splicing two files together and creating the transition code, altering retraction distance in a file, removing Z-hops, changing a file created for 2.85mm filament to 1.75mm filament (or vice versa) are some of the utilities in the app.  Not stuff that would be terribly useful to anyone else, but I've been stuck in the house a lot.

  • 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

      • Startups, apply for the Forward AM Innovation Award!
        Are you a startup using 3D printing? Perhaps you should continue reading... 
         
        Together with BASF we are launching the Forward AM Innovation Award - the very first global contest for startups developing new applications with 3D printing!
         
        Why apply?
        The winning startup will receive €100,000 in goods and services*, along with coaching and marketing exposure from top-notch leaders in the industry.
         

         
        Who can apply?
        Your startup creates products using Additive Manufacturing, is less than 5 years old, and has less than 50 employees. We are looking for 3D printing applications with a strong focus on innovation, sustainability and scalability.
         
        Dental aligners, shoes, tools, automotive parts, music instruments, industrial tooling and molding, medical implants, sports equipment, toys, architecture, fashion, construction... all are welcome to join!
         
        Do you have an innovative, sustainable and scalable idea that leverages the unique possibilities of 3D printing? Then it is time to apply!
        More information can be found here.
         
        Applications close on March 28th, 2021
        * What does "in goods and services" mean?
        The winner will be able to pick any item from the overall product and service portfolio of the sponsors, e.g. printers, materials, consulting, software... Choose whatever you need to accelerate your startup.
         
          • Like
        • 0 replies
      • New here? Register your Ultimaker for free 3D printer onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 0 replies
    ×
    ×
    • Create New...