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updated readme
2011-01-25 14:27:18 +01:00
h1. Grbl - An embedded g-code interpreter and motion-controller for the Arduino/AVR328 microcontroller
updated readme
2011-01-25 14:42:27 +01:00
Grbl is a no-compromise, high performance, low cost alternative to parallel-port-based motion control for CNC milling. It will run on a vanilla Arduino (Duemillanove/Uno) as long as it sports an Atmega 328.
updated readme
2011-01-25 14:27:18 +01:00
updated readme
2011-01-25 14:42:27 +01:00
The controller is written in highly optimized C utilizing every clever feature of the AVR-chips to achieve precise timing and asynchronous operation. It is able to maintain more than 30kHz of stable, jitter free control pulses.
updated readme
2011-01-25 14:27:18 +01:00
Initial v0.8 ALPHA commit. Features multi-tasking run-time command execution (feed hold, cycle start, reset, status query). Extensive re-structuring of code for future features. - ALPHA status. - Multitasking ability with run-time command executions for real-time control and feedback. - Decelerating feed hold and resume during operation. - System abort/reset, which immediately kills all movement and re-initializes grbl. - Re-structured grbl to easily allow for new features: Status reporting, jogging, backlash compensation. (To be completed in the following releases.) - Resized TX/RX serial buffers (32/128 bytes) - Increased planner buffer size to 20 blocks. - Updated documentation.
2011-12-09 02:47:48 +01:00
It accepts standards-compliant G-code and has been tested with the output of several CAM tools with no problems. Arcs, circles and helical motion are fully supported, as well as, other basic functional g-code commands. Functions and variables are not currently supported, but may be included in future releases in a form of a pre-processor.
updated readme
2011-01-25 14:27:18 +01:00
Program stop support (M0,M1*,M2,M30*), proper position retainment upon reset, misc minor updates. - Program stop support (M0,M1*,M2,M30*). *Optional stop to be done. *Pallet shuttle not supported. - Work position is set equal to machine position upon reset, as according to NIST RS274-NGC guidelines. G92 is disabled. - Renamed mc_set_current_position() to mc_set_coordinate_offset(). - Fixed bug in plan_synchronize(). Would exit right before last step is finished and caused issues with program stops. Now fixed. - Spindle now stops upon a run-time abort command. - Updated readme and misc upkeeping.
2012-01-29 04:41:08 +01:00
Grbl includes full acceleration management with look ahead. That means the controller will look up to 18 motions into the future and plan its velocities ahead to deliver smooth acceleration and jerk-free cornering.
updated readme
2011-01-25 14:42:27 +01:00
Initial v0.8 ALPHA commit. Features multi-tasking run-time command execution (feed hold, cycle start, reset, status query). Extensive re-structuring of code for future features. - ALPHA status. - Multitasking ability with run-time command executions for real-time control and feedback. - Decelerating feed hold and resume during operation. - System abort/reset, which immediately kills all movement and re-initializes grbl. - Re-structured grbl to easily allow for new features: Status reporting, jogging, backlash compensation. (To be completed in the following releases.) - Resized TX/RX serial buffers (32/128 bytes) - Increased planner buffer size to 20 blocks. - Updated documentation.
2011-12-09 02:47:48 +01:00
*Changelog for v0.8 from v0.7:*
Program stop support (M0,M1*,M2,M30*), proper position retainment upon reset, misc minor updates. - Program stop support (M0,M1*,M2,M30*). *Optional stop to be done. *Pallet shuttle not supported. - Work position is set equal to machine position upon reset, as according to NIST RS274-NGC guidelines. G92 is disabled. - Renamed mc_set_current_position() to mc_set_coordinate_offset(). - Fixed bug in plan_synchronize(). Would exit right before last step is finished and caused issues with program stops. Now fixed. - Spindle now stops upon a run-time abort command. - Updated readme and misc upkeeping.
2012-01-29 04:41:08 +01:00
- *ALPHA status: _Under heavy development. Code state may significantly change with each push as new features are integrated._*
- Major structural overhaul to allow for multi-tasking events and new feature sets
Update readme.textile
2012-01-18 02:05:46 +01:00
- New run-time command control: Feed hold (pause), Cycle start (resume), Reset (abort), Status reporting
Initial v0.8 ALPHA commit. Features multi-tasking run-time command execution (feed hold, cycle start, reset, status query). Extensive re-structuring of code for future features. - ALPHA status. - Multitasking ability with run-time command executions for real-time control and feedback. - Decelerating feed hold and resume during operation. - System abort/reset, which immediately kills all movement and re-initializes grbl. - Re-structured grbl to easily allow for new features: Status reporting, jogging, backlash compensation. (To be completed in the following releases.) - Resized TX/RX serial buffers (32/128 bytes) - Increased planner buffer size to 20 blocks. - Updated documentation.
2011-12-09 02:47:48 +01:00
- Controlled feed hold with deceleration to ensure no skipped steps and loss of location.
- After feed hold, cycle accelerations are re-planned and may be resumed.
G54 work coordinate support (w/ G10,G92.1). Re-factored g-code parser with error checking. Minor compiler compatibility changes. - G54 work coordinate system support. Up to 6 work coordinate systems (G54-G59) available as a compile-time option. - G10 command added to set work coordinate offsets from machine position. - G92/G92.1 position offsets and cancellation support. Properly follows NIST standard rules with other systems. - G53 absolute override now works correctly with new coordinate systems. - Revamped g-code parser with robust error checking. Providing user feedback with bad commands. Follows NIST standards. - Planner module slightly changed to only expected position movements in terms of machine coordinates only. This was to simplify coordinate system handling, which is done solely by the g-code parser. - Upon grbl system abort, machine position and work positions are retained, while G92 offsets are reset per NIST standards. - Compiler compatibility update for _delay_us(). - Updated README.
2012-02-11 19:59:35 +01:00
- Re-factored g-code parser with robust error-checking.
- Work coordinate system (G54), offsets(G92), and machine coordinate system support. G10 work coordinate settings support. (Up to 6 work coordinate systems(G54-G59) available as a compile-time option.)
- Program stop(M0,M1*,M2,M30) initial support. Optional stop to do.
- System reset re-initializes grbl without resetting the Arduino and retains machine/home position and work coordinates.
Initial v0.8 ALPHA commit. Features multi-tasking run-time command execution (feed hold, cycle start, reset, status query). Extensive re-structuring of code for future features. - ALPHA status. - Multitasking ability with run-time command executions for real-time control and feedback. - Decelerating feed hold and resume during operation. - System abort/reset, which immediately kills all movement and re-initializes grbl. - Re-structured grbl to easily allow for new features: Status reporting, jogging, backlash compensation. (To be completed in the following releases.) - Resized TX/RX serial buffers (32/128 bytes) - Increased planner buffer size to 20 blocks. - Updated documentation.
2011-12-09 02:47:48 +01:00
- Restructured planner and stepper modules to become independent and ready for future features.
Added step pulse delay after direction set (Compile-time option only). Updated read me. Added a compile-time only experimental feature that creates a user-specified time delay between a step pulse and a direction pin set (in config.h). This is for users with hardware-specific issues (opto-couplers) that need more than a few microseconds between events, which can lead to slowly progressing step drift after many many direction changes. We suggest to try the hack/fix posted in the Wiki before using this, as this experimental feature may cause Grbl to take a performance hit at high step rates and about complex curves.
2012-06-27 05:48:42 +02:00
- Reduced serial read buffer to 128 characters and increased write buffer to 64 characters.
- Misc bug fixes and removed deprecated acceleration enabled code.
- Planned features: Jog mode, full-featured status reporting, runtime settings such as toggling block delete.
- Advanced compile-time options: Up to 6 work coordinate systems(G54-G59), XON/XOFF flow control (limited support), direction and step pulse time delay.
updated readme
2011-01-25 14:27:18 +01:00
Initial v0.8 ALPHA commit. Features multi-tasking run-time command execution (feed hold, cycle start, reset, status query). Extensive re-structuring of code for future features. - ALPHA status. - Multitasking ability with run-time command executions for real-time control and feedback. - Decelerating feed hold and resume during operation. - System abort/reset, which immediately kills all movement and re-initializes grbl. - Re-structured grbl to easily allow for new features: Status reporting, jogging, backlash compensation. (To be completed in the following releases.) - Resized TX/RX serial buffers (32/128 bytes) - Increased planner buffer size to 20 blocks. - Updated documentation.
2011-12-09 02:47:48 +01:00
*Important note for Atmega 168 users:* Going forward, support for Atmega 168 will be dropped due to its limited memory and speed. However, legacy Grbl v0.51 "in the branch called 'v0_51' is still available for use.
added another note for existing users
2011-02-17 20:03:29 +01:00
updated readme
2011-01-25 14:42:27 +01:00
_The project was initially inspired by the Arduino GCode Interpreter by Mike Ellery_
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