Siemens SINUMERIK 840D sl Function Manual page 1311

Linear feedrate (G94)
The linear feedrate is programmed in the following units relative to a linear or rotary axis:
● [mm/min, degrees/min] on standard metric systems
● [inch/min, degrees/min] on standard imperial systems
Revolutional feedrate (G95)
The revolutional feedrate is programmed in the following units relative to a master spindle:
● [mm/rev] on standard metric systems
● [inch/rev] on standard imperial systems
● [degrees/rev] on a rotary axis
The path velocity is calculated from the actual speed of the spindle according to the following
formula:
with
Note
The programmed F value is deleted when the system switches between the feedrate types
G93, G94 and G95.
Tooth feedrate
Primarily for milling operations, the tooth feedrate FZ... (feed distance per tooth), which is
more commonly used in practice, can be programmed instead of the revolutional feedrate
F...:
The controller uses the $TC_DPNT (number of teeth per revolution) tool parameter associated
with the active tool offset data record to calculate the effective revolutional feedrate for each
traversing block from the programmed tooth feedrate.
with
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
V: Path velocity in mm/min or inch/min
n: Speed of the master spindle in rpm
F: Programmed revolutional feedrate in mm/rev or inch/rev
F: Revolutional feedrate in mm/rev or inch/rev
FZ: Tooth feedrate in mm/tooth or inch/tooth
$TC_DPNT: Tool parameter: Number of teeth/rev
V1: Feedrates
17.2 Path feedrate F
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