Use Of The Thread Cutting Function; Thread Cutting With Constant Lead (G32) - Siemens SINUMERIK 808D Programming And Operating Manual

Reference point positions
The positions of all the reference points are always determined in relation to the first reference point. The distance of the first
reference point from all subsequent reference points is set in the following machine data:
Element
2. Reference point
3. Reference point
4. Reference point
Note
Further details of the points that were considered in the programming of G30 are available in Section "Reference point
approach with intermediate point (G28) (Page 30)". Function G30 is implemented with the cycle 328.spf as with G28.
3.2.3

Use of the thread cutting function

3.2.3.1

Thread cutting with constant lead (G32)

Format
With the commands "G32 X (U)... Z (W)... F... ;", the three thread types "Cylindrical thread", "Transversal thread", "Taper
thread" can be prepared as right- or left-hand thread. The thread lead is defined with F. The end point coordinates are
determined with X, Z (absolute) or U, W (incremental).
G Code System A
G32
Thread cutting:
Direction of thread lead
In case of taper threads, the direction in which the programmed lead is effective, depends on the taper angle. See the table
below.
32
MD
$_MA_REFP_SET_POS[1]
$_MA_REFP_SET_POS[2]
$_MA_REFP_SET_POS[3]
G Code System B
G33
Direction of thread lead
α ≦ 45° The programmed thread lead acts in the direction of the Z-axis.
α > 45° The programmed thread lead acts in the direction of the X-axis.
G Code System C
G33
Programming and Operating Manual (ISO Turning/Milling)
01/2017