grbl

This release fixes minor bugs and includes a new optional dual motor support for self-squaring gantry homing.

[OPTIONAL] Dual motor support for self-squaring gantry homing.

• NOTE: Default build remains the same! Dual motor support can only be enabled in config.h.
• New dual motor support feature for gantry CNC machines. An axis motor is efficiently mirrored to a dedicated set...

This release includes a critical bug fix (rare) and some other minor bug fixes, updates and new non-critical features.

[fix] A very rare bug would cause Grbl to crash in a very special and very rare set of circumstances. It would occur only when actively lowering feed/rapid overrides and the programmed move and settings aligned perfectly. Re-factored the problem code to eliminate the potent...

This release contains some minor tweaks to the streaming interface, new features, and bug fixes:

[new] The $I build info output now shows two additional values separated by commas [OPT:VL,15,128]. The first value is the total number of usable planner buffer blocks, and the other value is the total number of serial RX buffer bytes available. This information is primarily for GUI handsha...

• Fixes an issue where tool number values were not tracked and reported in the g-code parser state.
• Added a new error code (38) to indicate an invalid tool number sent to the parser.

• Contains a critical bug fix for alarm handling. A recent change to internal alarm codes were not handled correctly and would occasionally show the wrong code and enter an infinite loop.
• Re-installed optional software debouncing for hard limit switches.
• Documentation updates.