What do the A parameters mean in these lines from a 3d printer?

G1 X-30.856 Y-11.207 Z0.100 F1500 A-0.10404; Retract G1 X-18.856 Y-4.626 Z0.100 F9000; Travel move G1 X-18.856 Y-4.626 Z0.100 F1500 A1.19596; Restart
G1 X-18.856 Y-1.044 Z0.100 F1800 A1.25856; Support G1 X-16.856 Y-3.620 Z0.100 F1800 A1.31556; Support G1 X-16.856 Y1.196 Z0.100 F1800 A1.39974; Support G1 X-14.856 Y1.583 Z0.100 F1800 A1.43535; Support G1 X-14.856 Y6.155 Z0.100 F1800 A1.51526; Support G1 X-12.856 Y10.662 Z0.100 F1800 A1.60146; Support G1 X-12.856 Y1.381 Z0.100 F1800 A1.76370; Support G1 X-14.856 Y-0.503 Z0.100 F1800 A1.81173; Support G1 X-14.856 Y-1.790 Z0.100 F1800 A1.83423; Support G1 X-14.856 Y-1.790 Z0.100 F1500 A0.53423; Retract G1 X-14.856 Y8.287 Z0.100 F9000; Travel move G1 X-14.856 Y8.287 Z0.100 F1500 A1.83423; Restart G1 X-14.856 Y10.540 Z0.100 F1800 A1.87360; Support
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SwearinJim wrote:

A is a traditional rotary axis. If you want to run this on a traditional CNC control, then you need to use axis words it accepts. Some 3D slicer codes generate E words for "extruder", but that is not valid with traditional G code. The comments, retract, travel, support seem to confirm my interpretation.
Jon
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replying to Jon Elson , SwearinJim wrote:

That was my guess also. I have seen the E codes in gcode output from other 3D printers. As you observed the accepted function of the E code does not match the usage.
Thanks
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