Siemens sinumerik 840d Programming Manual page 273

04.00
8
8.3 Online tool offset PUTFTOCF, PUTFTOC, FTOCON, FTOCOF
840D
NCU 572
NCU 573
Programming example
Task
On a surface grinding machine with the following
parameters, the grinding wheel is to be dressed by
the amount 0.05 after the start of the grinding
movement at X100. The dressing amount is to be
active with write online offset continuously.
Y: Infeed axis for the grinding wheel
V: Infeed axis for the dresser roll
Machine: Channel 1 with axes X, Z, Y
Dress: Channel 2 with axis V
Machining program in channel 1:
%_N_MACH_MPF
...
N110 G1 G18 F10 G90
N120 T1 D1
N130 S100 M3 X100
N140 INIT (2, "DRESS", "S")
N150 START (2)
N160 X200
N170 FTOCON
N... G1 X100
N...M30
Dressing program in channel 2:
%_N_DRESS_MPF
...
N40 FCTDEF (1, –1000, 1000, –$AA_IW[V], 1) Define function: Straight line
N50 PUTFTOCF (1, $AA_IW[V], 3, 1)
N60 V–0.05 G1 F0.01 G91
...
N... M30
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
840Di
Basic position
Select current tool
Spindle on, travel to starting position
Select dressing program on channel 2
Start dressing program on channel 2
Travel to destination position
Activate online offset
Continue machining
Write online offset continuously:
Length 3 of the current grinding wheel is
derived from the movement of the V axis
and corrected in channel 1.
Infeed movement for dressing, PUTFTOCF
is only effective in this block
Y
0.05
Workpiece
100
Tool Offsets
8
Dressing roll
Grinding
wheel
X
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