Siemens SINUMERIK 808D User Manual

Programming and Operating Manual (Milling)
6FC5398-4DP10-0BA6, 09/2017
101
See the following illustration for feedrate override G901 with internal/external machining:
Corrected feedrate
● External machining:
F
corr.
= F
prog.
(r
cont
+ r
tool
) / r
cont
● Internal machining:
F
korr.
= F
prog.
(r
cont
- r
tool
) / r
cont
r
cont
: Radius of the circle contour
r
tool
: Tool radius
Programming example
N10 G42 G1 X30 Y40 F1000
; Tool radius compensation ON
N20 CFC F350
; Feedrate override with circle ON
N30 G2 X50 Y40 I10 J-7 F350
; Feed value acts on cont our
N40 G3 X70 Y40 I10 J6 F300
; Feed value acts on cont our
N50 CFTCP
; Feedrate override OFF, programmed fe edrate value acts at the
milling cutter center point
N60 M30
11.5
Thread cutting
11.5.1
Thread cutting with constant lead: G33
Fu n ctionality
This requires a spindle with position measuring system.
The function G33 can be used to machine threads with constant lead of the following type: If an appropriate tool is used,
tapping with compensating chuck is possible.
The compensating chuck compensates the resulting path differences to a certain limited degree.
The drilling depth is specified by specifying one of the axes X, Y or Z; the thread pitch is specified via the relevant I, J or K.
G33 remains active until canceled by another instruction from this G group (G0, G1, G2, G3...).
Right-hand or left-hand thread
Right-hand or left-hand thread is set with the rotation direction of the spindle (M3 right (CW), M4 left (CCW) - see Section
"Spindle movements (Page 109)"). To do this, the rotation value must be programmed under address S or a rotation speed
must be set.

Siemens SINUMERIK 808D Specifications

General

Brand	Siemens
Model	SINUMERIK 808D
Category	Control Unit
Language	English