Reference / Synchronize - Siemens SINUMERIK 840D Function Manual

S1: Spindles

18.3 Reference / synchronize

Syntax
G63 <axis> <direction of rotation> <speed <feedrate>
Meaning
G63:
<Axis>:
<Direction of
rotation>:
<Speed>:
<Feedrate>:
Example
Tapping an M5 thread:
● Spindle pitch according to the standard: 0.8 mm/rev
● Spindle speed S: 200 rpm
● Feedrate F = 200 rpm * 0.8 mm/rev = 160 mm/min.
Program code
N10 G1 X0 Y0 Z2 F1000 S200 M3
N20 G63 Z-50 F160
N30 G63 Z3 M4
18.3 Reference / synchronize
Why synchronize?
In order to ensure that the controller detects the exact position of the spindle when it is switched
on, the controller must be synchronized with the position measuring system of the spindle.
770
Tapping with compensating chuck
Effective: Non-modal
Traversing distance/position of the geometry axis (X, Y or Z) at the end of the
thread, e.g. Z50
Direction of spindle rotation:
● M3: Clockwise rotation, right-hand thread
● M4: Counterclockwise rotation, left-hand thread
Maximum permissible spindle speed while tapping, e.g. S100
Feedrate of the tapping axis F, with F = spindle speed * thread pitch
Comment
; Approach starting point
; Spindle clockwise direction of rotation, 200
rpm
; Tapping with compensating chuck
; Drilling depth: absolute Z=50mm
; Feedrate: 160 mm/min
; Retraction movement: absolute Z=3mm
; Direction of rotation reversal
; Spindle with counterclockwise direction of
rotation, 200 rpm
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA