Siemens SINUMERIK 840D sl Programming Manual page 96

Spindle motion
6.2 Cutting rate (SVC)
Example 4:
Assumptions:
Master or tool change is determined by the toolholder.
MD20124 $MC_TOOL_MANAGEMENT_TOOLHOLDER > 1
In the event of a tool change the old tool offset is retained. A tool offset for the new tool is only
activated when D is programmed:
MD20270 $MC_CUTTING_EDGE_DEFAULT = - 2
Program code
N10 $TC_MPP1[9998,1]=2
N11 $TC_MPP5[9998,1]=1
N12 $TC_MPP_SP[9998,1]=3
N20 $TC_MPP1[9998,2]=2
N21 $TC_MPP5[9998,2]=4
N22 $TC_MPP_SP[9998,2]=6
N30 $TC_TP2[2]="WZ2"
N31 $TC_DP6[2,1]=5.0
N40 $TC_TP2[8]="WZ8"
N41 $TC_DP6[8,1]=9.0
N42 $TC_DP6[8,4]=7.0
...
N100 SETMTH(1)
N110 T="WZ2" M6 D1
N120 G1 G94 F1000 M3=3 SVC=100
N130 SETMTH(4)
N140 T="WZ8"
N150 M6
N160 SVC=50
N170 D4
N180 SVC=300
96
Comment
; Magazine location is toolholder
; Magazine location is toolholder 1
; Toolholder 1 is assigned to spindle 3
; Magazine location is toolholder
; Magazine location is toolholder 4
; Toolholder 4 is assigned to spindle 6
; Radius = 5.0 mm of T2, offset D1
; Radius = 9.0 mm of T8, offset D1
; Radius = 7.0 mm of T8, offset D4
; Set master toolholder number
; Tool T2 is loaded and offset D1 is activated.
; S3 = (100 m/min * 1,000) / (5.0 mm * 2 * 3.14) = 3184.71 rpm
; Set master toolholder number
; Corresponds to T8="WZ8"
; Corresponds to M4=6
Tool "WZ8" is in the master toolholder, but because
MD20270=–2, the old tool offset remains active.
; S3 = (50 m/min * 1,000) / (5.0 mm * 2 * 3.14) = 1592.36 rpm
The offset applied to toolholder 1 is still active and
toolholder 1 is assigned to spindle 3.
Offset D4 of the new tool "WZ8" becomes active (in
toolholder 4).
; S6 = (300 m/min * 1,000) / (7.0 mm * 2 * 3.14) = 6824.39 rpm
Spindle 6 is assigned to toolholder 4.
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals