SpindleSynchronizedMotion

Basic lathe threading support (spindle synchronized motion) is now in EMC2. The image shows a 3/8-16 thread that was cut with EMC2.

The G33 syntax is subject to change. Right now, the usage is:

 G33 X- Y- Z- K-

where K- gives the distance moved in XYZ for each revolution of the spindle. This syntax is subject to change (in particular, to use F- instead of K-). Support for canned cycles may be in store--more about this is at Lathe Code.

The [sim/lathe] sample configuration has an emulated spindle encoder, and the example program [threading.ngc] shows G33 usage.

Online documentation for G76 (canned threading cycle): http://www.linuxcnc.org/docview/2.2/html/gcode_main.html#G76

Online documentation for G33 (spindle synchronized motion): http://www.linuxcnc.org/docview/2.2/html/gcode_main.html#sec:G33,-G33.1:-Spindle-Synchronized