Autoleveller

see the attached gcode with openscam (with mach3 is the same)

the offended row is 1162 on original file and 4459 in autolevelled gcode

G1X-1.047Y-50.032F500.0

G1X-147Y-50.032 Z[#100 + -1] F500

original

G0Z5.000
G0X-0.889Y-50.114
G0Z0.000
G1Z-1.000F182.0
G1X-1.047Y-50.032F500.0
X-1.297Y-49 ...