Lightweight 3-Axis CNC G-Code Simulator

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Origins

This simulator was part of JSCut discontinued CAM package which was developed since 2014 by Todd Fleming.

During 2024-09 it was isolated and modified to be useful in offline/standalone context by Tomas Mudrunka.

Similar project used to be available since 2016-05 at www.cncwebtools.com/Apps/GCode_Simulator/index.html but features were limited and the website is defunct since 2020-08.

Features

• Load g-code from file
• Pass settings and G-Code via URL
• Support for arcs (G02, G03, XY plane only, IJ reccomended, R experimental)
• Animation
• Works offline (no webserver needed, copy at archive.org wayback machine also works)
• V-Carving
• Visualize origin point
• Show current coordinates
• Mouse wheel zooming
• Non-square viewport supported
• Limited number of dependencies (jQuery and Bootstrap are no longer needed)

TODO

• Weird V-Bit behaviour when Surface Z > 0 (perhaps we should just transpose Z when parsing g-code, and fix origin crosshair...)
• Responsive layout to work better on small screens and mobile devices
• Shaded milling bit
• Support for mm/inch (bit settings and G21, G20)
• Support for ball nose and radiused milling bits
• Tool library and toolchanges (eg. T1 M6)

See also

• https://camotics.org/
• https://github.com/vlachoudis/bCNC
• https://github.com/LaserWeb/LaserWeb4
• https://harvie.github.io/cnc-simulator
• https://raw.githack.com/Harvie/cnc-simulator/master/index.html