Feedrate Control And Spindle Motion - Siemens SINUMERIK 840DE Programming Manual

Feedrate Control and Spindle Motion

7.1 Feedrate (G93, G94, G95 or F..., FGROUP, FGREF)
Programming
G93 or G94 or G95
F...
Or
FGROUP (X, Y, Z, A, B, ...)
Or
FL[axis]=...
Or
FGREF[axis name]=reference radius
Parameters
G93
G94
G95
F...
FGROUP
FL
FGREF
Axis
X Y Z
A B C
Example of operating principle of FGROUP
The following example illustrates the effect of FGROUP on the path and the path feedrate.
The variable $AC_TIME contains the time from the start of the block in seconds. It can only
be used in synchronized actions. See /FBSY/, Synchronized Actions.
N100 G0 X0 A0
N110 FGROUP(X,A)
N120 G91 G1 G710 F100
N130 DO $R1=$AC_TIME
N140 X10
N150 DO $R2=$AC_TIME
N160 X10 A10
N170 DO $R3=$AC_TIME
N180 A10
N190 DO $R4=$AC_TIME
N200 X0.001 A10
N210 G700 F100
N220 DO $R5=$AC_TIME
7-2
Note
The inverse-time feedrate 1/min G93 is not implemented for 802D.
Inverse-time feedrate 1/rpm
Feedrate in mm/min or inches/min or in deg/min
Feedrate in mm/rev or inches/rev with reference to the speed
of the master spindle – generally the cutting spindle or the
main spindle on the turning machine
Feedrate value in unit defined by G93, G94, G95
Feedrate value F valid for all axes specified in FGROUP
Limit speed for synchronized/path axes; the unit set with G94
applies (max. rapid traverse) One FL value can be programmed
per axis. The axis identifiers of the basic coordinate system
must be used (channel axes or geometry axes).
Effective radius (reference radius) for the rotary axes
entered in FGROUP
Channel axis or geometry axes or orientation axes
Movement of the specified geometry axis
Axis identifier for rotary axis to be traversed
;Feedrate=100 mm/min or 100 deg/min
;Feedrate=100 mm/min, path dist.=10 mm, R1=approx. 6
s
;Feedrate=100 mm/min, path dist.=14.14 mm, R2=approx.
8 s
;Feedrate=100 degrees/min, path dist.=10 degrees,
R3=approx. 6 s
;Feedrate=100 mm/min, path dist.=10 mm, R4=approx. 6
s
;Feedrate=2540 mm/min or 100 degrees/min
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
Fundamentals