ManuelW/grbl-LPC-CoreXY
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Switched to linebuffer buffering in main branch. Updated readme

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Simen Svale Skogsrud 2010-03-04 21:39:49 +01:00
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Grbl - An embedded rs274/ngc (g-code) interpreter, CNC controller, readout and exerciser for the AVR series of microcontrollers.
Inspired by the Arduino GCode Interpreter by Mike Ellery
Grbl - An embedded rs274/ngc (g-code) integrater interpreter and motion-controller for the Arduino/AVR328 microcontroller
Goal: A no-compromise, high performance, low cost alternative to parallel-port based motion control for CNC milling
Status:
* Runs on atmega168/arduino.
* GCode interpreter complete
* Linear interpolation machine control complete
* Arcs and helical interpolation complete
* Buffered, non blocking, asynchronous stepping so the rest of the system is free to generate new steps and parse
g-code while the steppers are still steppin'
* Basic serial protocol complete
* Stepper pulses verified on scope and tested with stepper motors, motion and rates verified with simulator,
but not tested on real CNC-rig. Still waiting for my micRo kit from Lumenlab.com
* Ready for production, but probably rough around the edges still
* Highly optimized C utilizing the hardware-timers of the AVR-chip for all critical timing
* Able to maintain more than 30kHz step rate, generating an ultra clean, jitter free step-signal
* G-code interpreter complete, tested with output from several CAM tools
* Standards-compliant g-code arcs/circles fully supported
* Buffered, non blocking, asynchronous step generation so the rest of the system is free to process
g-code while the steppers are steppin'
* Tested on very few (two) CNC rigs
Pending:
* Battle hardening in the field
* Documentation and web-site
* Simpler configuration (w/o recompilation)
* Optional support for a alphanumeric LCD readout, a joystick and a few buttons for program control
* Optional support for automated cutter length calibration when milling
* Support "headless" fabrication by buffering all code to SD-card or similar
* Smooth feed rate interpolation
* Easing of feed rate
* Spindle control
Limitations:
Limitations by design:
* Limited GCode-support. Focus on the kind of GCode produced by CAM tools. Leave human GCoders frustrated.
* No support for tool offsets (typically handled by CAM-tool)
* No rotation axes, only x, y and z.
The project was initially inspired by the Arduino GCode Interpreter by Mike Ellery