CNC Z32 - Programming guide (Milling machines manufacturer) Warning : If a segment shortened or deleted due to the radius correction, contains a movement on the third axis, this movement will be completely executed together with the next valid movement. Because the function G12 poses some limitations (slope, radius correction, etc.) it is a good programming practice to program it only when necessary and disable it (G13) when not. Example: G12 G3 X..Y..I..J..Z.. G13 It is not possible to program an helicoids more than one complete turn in a single block. To program more than one turn, a repeating cycle must be used.

2.12 Incremental coordinates programming (G90 G91)

The programming of incremental positions happens through the G91 function. The syntax is as follows: HX.. G91 Starts the incremental programming in micron The parameter HX defines the scale of increment expressed in thousandth of display units .To get programmed increments in display units (millimeters, inches or degrees) it is necessary to program HX1000 In the normal practice it is common to program: HX1000 G91 The G91 function is modal and can be deactivated by programming G90. Example:
Y 80 80 F1000G0 X10 Y10 (activates incremental programming:) G1 X20 Y35 X30 Y15 (deactivates incremental programming:) HX1000 G91 X80 Y80
3515 G90
100010 X 2030 Warning : The HX parameter must be programmed before the G91 programming: Correct : HX1000 G91 Erroneous: G91 HX1000

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