Siemens SINUMERIK 808D Programming And Operating Manual page 76

Mα: M function for locking the C axis
M(α+1): M function for releasing the C axis
P1: Dwell time (Program)
P2: Specification of the dwell time in USER DATA, _ZSFR[22]
Example
M3 S2500
G00 X100.0 C0.0
G83 Z-35.0 R-5.0 P500 F5.0
C90.0
C180.0
C270.0
G80 M05
After the programmed cutting depth has been reached for each cutting feedrate Q, the retraction is made to the reference
plane R with rapid traverse. The approach motion for a new cut is also done again with rapid traverse, and that too by the
path (d), which can be set in USER DATA, _ZSFR[10]. The path d and the cutting depth for each cutting feedrate Q is
traversed with cutting feedrate. Q is to be specified incrementally without sign.
Note
If _ZSFR[10]
> 0 = value is used for the derivative path "d" (minimum path 0.001)
•
= 0 The limit point distance d is calculated internally in the cycles as follows:
•
– If the drilling depth is 30 mm, then the value for the derivative path is always 0.6 mm.
– For higher drilling depths the formula drilling depth/50 is used (maximum value 7 mm).
Tapping cycle front face (G84), side surface (G88)
In this cycle the direction of rotation of the spindle at the bottom of a hole is reversed.
Format
G84 X(U)... C(H)... Z(W)... R... P... F... M... K... ;
or
G88 Z(W)... C(H)... X(U)... R... P... F... M... K... ;
X, C or Z, C: Position of the hole
Z or X: Distance from the point R to the bottom of the hole
R_: Distance from the initial plane to the plane R
76
;Rotate the drilling tool
;Positioning X and C axis
;Machining of hole 1
;Machining of hole 2
;Machining of hole 3
;Machining of hole 4
;Deselection of the cycle and
;Stopping of the drilling tool
Programming and Operating Manual (ISO Turning/Milling)
01/2017