OctoPrint-Nozzle-Filament-Validator

This plugin validates slicer profile, nozzle size (for each extruder), build plate, and filament type (for each extruder) before starting a print. It uses the slicer config present in the gcode to work, it is not a replacement for checking yourself but can help to prevent simple mistakes from occurring

Settings page with multiple extruders:

Settings page for extruder 1:

Settings page for 1 extruder:

Setup

Install via the bundled Plugin Manager or manually using this URL:

https://github.com/Rylan-Meilutis/OctoPrint-Nozzle-Filament-Validator/archive/master.zip

Needed plugins

• Spool Manager - This plugin will automatically set the filament type for the spool if you have it installed and have set the filament type for the spool.

Slicer Compatibility

This plugin is currently known to be compatible with the Prusa slicer. It may work with other slicers but has not been tested. If you are having issues with a slicer feel free to start a discussion and I will see what I can do.

Configuration

Make sure the printer model is set in the printer profile. This is used to determine whether gcode has been sliced for your printer. (if you get a message saying the printer model is wrong, you can copy the printer model from the error message if you know you sliced the gcode correctly and paste it into the printer profile).

Go to plugin settings and set your nozzle size for each extruder (or extruder 1 if you have a single tool head machine, and build plate.

Filament type should be set automatically if you have spool manager installed and have set the filament type for the spool. If you do not have spool manager installed, filament type will not be checked.

If using a plugin that runs a .gcode file such as the continuous print queue plugin, You can skip gcode validation for that file by adding ; skip_validation in the bottom 1000 lines in the gcode file (This works on all .gcode files so be careful when using it).

When you go to print, the plugin will check if the gcode settings match the settings you have set, and that the current filament is supported by the selected build plate. If it does not match, it will notify you of the error. If it does match, it will notify you of a successful validation.

Multi Extruder Support

When configured in octoprint, this plugin supports multi material printers. It will check filament type on each extruder and nozzle size on each extruder (if your printer has more than 1 nozzle). It will also check the build plate for all filaments being used. If any of the extruders do not match the settings, it will notify you of the error and cancel the print.

Spool selection

This option is disabled by default

This feature is case-sensitive

As of current, the plugin can check that the correct spool is loaded in each extruder. This is done by checking the name of the spool in the spool manager plugin. If the correct spool is not loaded, it will notify you of the error and allow you to pick between three options: Confirm the correct spool is loaded (this will switch the loaded spool in spool manager), cancel the print, or ignore the incorrect spool (will continue the print with the current loaded spool). With either selection, the filament type will be checked after the spool is selected or ignored, so filament type checking remains the same.

There is also a timeout that can be adjusted in the settings. This is the time in seconds that the plugin will wait before failing the print.

Slicer config

Using this requires the slicer to be set up correctly. The plugin will look for the following settings in the notes section of the filament profile in the gcode [sm_name = (filament name)] (the brackets are essential for the plugin to find the setting) (Note: you cannot have brackets [] in the name of your filament.)

Image of the settings in Prusa slicer:

Post-Processor

Having a different filament profile for each spool can be a pain, especially if you have a lot of spools. So a post-processing script has been developed to make it easier to add the spool data to the gcode. This is not required to use the plugin, but it can make it easier to manage your spools. Information on how to use the post-processor can be found here

In Development

Nothing major at the moment, just bug fixes, removing unused functions, and other minor improvements.

Coming Soon

• ** Add the ability to change the spool type in the gcode from the octoprint webui.

• Add the ability to scan the gcode before starting a print to verify the settings

• Add the ability to auto scan new files for compatability when they are uploaded and remove them if they are not compatible

• Add the ability to scan all files and remove ones that aren't compatible