Siemens SINUMERIK 828D Programming Manual page 114

Feed control
7.1 Feedrate (G93, G94, G95, F, FGROUP, FL, FGREF)
Further information
Feedrate for path axes (F)
The path feedrate is generally composed of the individual speed components of all geometry
axes participating in the movement and refers to the center point of the cutter or the tip of the
turning tool.
The feedrate is specified under address
data, the units of measurement specified with the G commands are either in mm or inch.
One
G commands
new feedrate is programmed. Separators are permitted after the address
Examples:
F100
F.5
F=2*FEED
Feedrate type (G93/G94/G95)
The G commands
G95
feedrate can also be specified in degrees/min.
Inverse-time feedrate (G93)
The inverse-time feedrate specifies the time required to execute the motion commands in a
block.
Unit: rpm
Example:
N10 G93 G01 X100 F2
Significance: the programmed path is traversed in 0.5 min.
114
value can be programmed per NC block. The feedrate unit is defined using one of the
F
/ / . The feedrate
G93 G94 G95
or
F 100
,
G93 G94
, the path feedrate value has to be reprogrammed. When machining with rotary axes, the
. Depending on the default setting in the machine
F
acts only on path axes and remains active until a
F
and are modal. In the event of switching between
G95
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
.
F
, and
G93 G94
Fundamentals