Non-Modal Feedrate (Fb) - Siemens SINUMERIK 828D Programming Manual

Feed control

7.11 Non-modal feedrate (FB)

7.11 Non-modal feedrate (FB)
Function
The "Non-modal feedrate" function can be used to define a separate feedrate for a single
block. After this block, the previous modal feedrate is active again.
Syntax
FB=<value>
Significance
:
FB
<VALUE>
Note
If no traversing motion is programmed in the block (e.g. computation block), the
effect.
If no explicit feedrate for chamfering/rounding is programmed, then the value of
applies for any chamfering/rounding contour element in this block.
Feedrate interpolations
Simultaneous programming of
(modal path feedrate) is not possible.
Example
Program code
N10 G0 X0 Y0 G17 F100 G94
N20 G1 X10
N30 X20 FB=80
N40 X30
...
152
Feedrate for current block only
: The programmed value must be greater than zero.
Values are interpreted based on the active feedrate type:
• G94: feedrate in mm/min or degrees/min
• G95: feedrate in mm/rev or inch/rev
• G96: Constant cutting rate
,
FLIN FCUB
, etc. are also possible without restriction.
and (handwheel travel with feedrate override) or
FB FD
Comment
; Initial setting
; Feedrate 100 mm/min
; Feedrate 80 mm/min
; Feedrate is 100 mm/min again.
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
has no
FB
also
FB
F
Fundamentals