GCode Macros

current set of variable substitutions

All Modes "pre" and "post" (header/footer)

• {top} = offset in mm of bed top Y axis

• {left} = offset in mm of bed left X axis

• {right} = offset in mm of bed right X axis

• {bottom} = offset in mm of bed bottom Y axis

All Modes "post" (footer)

• {time} = job run time (printing/milling) in seconds (fractional)

• {print-time} = alias for {time} ... deprecated after 2.8

• {print_time} = alias for {time} ... 2.9 and beyond

3D printing / FDM

"pre", "post", and other macros

• {temp} = hot end temperature

• {bed_temp} = bed temperature

• {fan_speed} = active cooling fan speed (usually 0-255)

• {material} = length in mm of material (filament) used

• {layers} = total # of layers

• {layer} = current layer number

• {height} = current layer height in mm

• {range(from,to)} = evaluated using {layer} and {layers}

• {z_max} = max build height in mm

• {z} = current z position

• {e} = amount of filament extruded

Anything inside {} will be evaluated using full expressions including use of Javascript's internal classes and methods. Example: {Math.min(layer/layers, 0.5) + 1}

CAM

• {tool} = CAM tool #

• {tool_name} = CAM tool name

• {time} = dwell time in seconds

• {time_ms} = dwell time in milliseconds

• {time_sec} = dwell time in seconds

• {speed} = spindle speed

• {spindle}, {rpm} = spindle speed (v2.7+)

simple algebraic expressions supported in the form

• {token+n} {token-n}