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.
- 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.
- 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.
- 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.
