Homemade DIY Small CNC Lathe. I tried making original G code 

Thank you. I end up making and machining most of the G-code myself.

The G71/G72 cycle is intended to rough cut a profile on a lathe. The G71 cycles remove layers of the material while traversing in the Z direction. The G72 cycles remove material while traversing the X axis, the so called facing cycle. The direction of travel is the same as in the path given in the subroutine. For the G71 cycle the Z coordinate must be monotonically changing, for the G72 this is required for the X axis. linuxcnc.org/docs/devel/html/gcode/g-code.html#gcode:g71-g72

Thanks for letting me know. I will give it a try.

Thanks for letting me know. I will study it.

Thank you. Comments like yours are very important to keep me motivated.