general | February 22, 2026

What is the purpose of g17 g18 and g19 G codes?

One of three G codes is used to select the plane, G17 for XY, G18 for XZ, and G19 for YZ. Each is modal and applies to all subsequent circular motions. The default plane selection is G17, which means that a circular motion in the XY plane can be programmed without selecting G17.Click to see full answer. Likewise, people ask, what is g17 G code?G17 is the G-code used for selection of XY plane in a CNC programming. In this plane arc is parallel to XY plane and the circular motion is defined as clockwise for the operator looking down onto the XY table from above.Additionally, what is U and W in CNC? Using U and W on a CNC Lathe. On a CNC machining centre incremental and absolute are modal. That means when one is active it stays active until you programme the other. Now on a CNC Lathe it’s different. You just change your axis to U or W. People also ask, why G codes are used? G-code. G-code (also RS-274), which has many variants, is the common name for the most widely used numerical control (NC) programming language. It is used mainly in computer-aided manufacturing to control automated machine tools. G-code is a language in which people tell computerized machine tools how to make somethingWhat is G and M code?G Code is a Geometric Code, which is used for make a geometry/profile of a component having cylinder/bar in CNC Lathe or Rectangular Plates in CNC Milling and CNC WEDM. M code is a Machine Code or Miscellaneus Code, which is used for machine functions in all CNC machines.