- G38.2 straight probe now supported. Rough draft. May be tweaked more
as testing ramps up.
- G38.2 requires at least one axis word. Multiple axis words work too.
When commanded, the probe cycle will move at the last ‘F’ feed rate
specified in a straight line.
- During a probe cycle: If the probe pin goes low (normal high), Grbl
will record that immediate position and engage a feed hold. Meaning
that the CNC machine will move a little past the probe switch point, so
keep federates low to stop sooner. Once stopped, Grbl will issue a move
to go back to the recorded probe trigger point.
- During a probe cycle: If the probe switch does not engage by the time
the machine has traveled to its target coordinates, Grbl will issue an
ALARM and the user will be forced to reset Grbl. (Currently G38.3 probe
without error isn’t supported, but would be easy to implement later.)
- After a successful probe, Grbl will send a feedback message
containing the recorded probe coordinates in the machine coordinate
system. This is as the g-code standard on probe parameters specifies.
- The recorded probe parameters are retained in Grbl memory and can be
viewed with the ‘$#’ print parameters command. Upon a power-cycle, not
a soft-reset, Grbl will re-zero these values.
- Moved ‘$#’ command to require IDLE or ALARM mode, because it accesses
EEPROM to fetch the coordinate system offsets.
- Updated the Grbl version to v0.9d.
- The probe cycle is subject to change upon testing or user-feedback.
- Added a new source and header file called system. These files contain
the system commands and variables, as well as all of the system headers
and standard libraries Grbl uses. Centralizing some of the code.
- Re-organized the include headers throughout the source code.
- ENABLE_M7 define was missing from config.h. Now there.
- SPINDLE_MAX_RPM and SPINDLE_MIN_RPM now defined in config.h. No
uncommenting to prevent user issues. Minimum spindle RPM now provides
the lower, near 0V, scale adjustment, i.e. some spindles can go really
slow so why use up our 256 voltage bins for them?
- Remove some persistent variables from coolant and spindle control.
They were redundant.
- Removed a VARIABLE_SPINDLE define in cpu_map.h that shouldn’t have
been there.
- Changed the DEFAULT_ARC_TOLERANCE to 0.002mm to improve arc tracing.
Before we had issues with performance, no longer.
- Fixed a bug with the hard limits and the software debounce feature
enabled. The invert limit pin setting wasn’t honored.
- Fixed a bug with the homing direction mask. Now is like it used to
be. At least for now.
- Re-organized main.c to serve as only as the reset/initialization
routine. Makes things a little bit clearer in terms of execution
procedures.
- Re-organized protocol.c as the overall master control unit for
execution procedures. Not quite there yet, but starting to make a
little more sense in how things are run.
- Removed updating of old settings records. So many new settings have
been added that it’s not worth adding the code to migrate old user
settings.
- Tweaked spindle_control.c a bit and made it more clear and consistent
with other parts of Grbl.
- Tweaked the stepper disable bit code in stepper.c. Requires less
flash memory.
(NOTE: This push is likely buggy so proceed with caution. Just
uploading to let people know where we're going.)
- New report.c module. Moved all feedback functions into this module to
centralize these processes. Includes realtime status reports, status
messages, feedback messages.
- Official support 6 work coordinate systems (G54-G59), which are
persistently held in EEPROM memory.
- New g-code support: G28.1, G30.1 stores current machine position as a
home position into EEPROM. G10 L20 Px stores current machine position
into work coordinates without needing to explicitly send XYZ words.
- Homing performed with '$H' command. G28/G30 no longer start the
homing cycle. This is how it's supposed to be.
- New settings: Stepper enable invert and n_arc correction installed.
- Updated and changed up some limits and homing functionality. Pull-off
travel will now move after the homing cycle regardless of hard limits
enabled. Fixed direction of pull-off travel (went wrong way).
- Started on designing an internal Grbl command protocol based on the
'$' settings letter. Commands with non numeric characters after '$'
will perform switch commands, homing cycle, jogging, printing
paramters, etc. Much more to do here.
- Updated README to reflect all of the new features.
- Added coolant control! Flood control (M8) functions on analog pin 0.
Mist control (M7) is compile-time optional and is on analog pin 1. (Use
only if you have multiple coolants on your system). Based on work by
@openpnp.
- Fixed some variable assignments in spindle control.
- Updated makefile to be more universally compatible by not requiring
grep or ruby.
- Edited XON/XOFF flow control usage, noting that FTDI-based Arduinos
are known to work, but not Atmega8U2-based Arduino. Still officially
not supported, but added for advanced users.
- Minor edits.
Sonny Jeon