For these, step/dir on pins D12/D13, and spindle enable is moved to A3 (old coolant enable), while coolant enable is moved to A4 (SDA pin). Please take all precautions and test thouroughly before using this.ĭual axis motors supports two configurations: This will help keep any misconfigurations or failed limit switches from damaging the machine, but not completely eliminate this risk. For example, if the X-axis has dual motors and one X-axis triggers during homing, Grbl will abort 5% of the Y-axis max travel and the other X-axis limit fails to trigger. And deletes the spindle direction(D13) and optional coolant mist (A4) features to make room for the dual motor step and direction pins.ĭual axis homing will automatically abort homing if one limit switch triggers and travels more than 5% (default) of the non-dual axis max travel setting. Beware use at your own risk! Grbl is not responsible for any damage to any machines.ĭual axis motors is only supported on the X-axis or Y-axis. When the limit switches are setup correctly, Grbl will self-square the gantry (and stay square if $1=255 is programmed). Primarily used to independently home both sides of a dual-motor gantry with a pair of limit switches (second shared with Z-axis limit pin). An axis motor is efficiently mirrored to a dedicated set of step and direction pins (D12/D13 or A3/A4) with no detectable loss of performance. New dual motor support feature for gantry CNC machines. NOTE: Default build remains the same! Dual motor support can only be enabled in config.h. Dual motor support for self-squaring gantry homing. This release fixes minor bugs and includes a new optional dual motor support for self-squaring gantry homing.
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