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Minor Versionm

by Frank Rupert Catapang


GPX includes a handful of presets for converting .gcode files to .x3g, but some printers or customizations require additional changes to these presets. For example, swapping to a new extruder on the Replicator 2 may require the extruder steps/mm value to be updated.

Chroma allows you to choose a preset, or point GPX towards an external config file (.ini) that should be used instead.

Note that lines beginning with a semicolon (;) are comments.

    • Download a starter config file here if you don’t already have one.

    • Open the config file in your text editor of choice.

    • When creating a config file, start by editing the machine_type field as appropriate, or removing it (or commenting it out) if the configuration is not based on an existing GPX preset.

    • Scroll through the file to find the appropriate setting that needs to be changed. If the setting is commented out with a semicolon, remove the semicolon to enable it.

    • Download the above config file (r2.ini) and open it in a text editor.

    • Scroll to the RIGHT EXTRUDER section.

    • Uncomment the steps_per_mm setting.

    • Change the value of steps_per_mm by editing the number after the equals (=) sign.


If you have any questions, please contact us at

Mosaic Support

Member since: 04/02/2020

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