V1: Feedrates; Brief Description - Siemens SINUMERIK 840D Function Manual

V1: Feedrates

5.1

Brief description

Types of feedrate
The feedrate determines the machining speed (axis or path velocity) and is observed in every
type of interpolation, even where allowance is made for tool offsets on the contour or on the tool
center point path (depending on G commands).
The following types of feedrate allow optimum adaptation to the various technological
applications (turning, milling, drilling, etc.):
● Rapid traverse feedrate (G0)
● Inverse-time feedrate (G93)
● Linear feedrate (G94)
● Revolutional feedrate (G95)
● Constant cutting speed (G96, G961)
● Constant speed (G97, G971)
● Feedrate for thread cutting (G33, G34, G35)
● Feedrate for tapping without compensating chuck (G331, G332)
● Feedrate for tapping with compensating chuck (G63)
● Feedrate for chamfer/rounding FRC, FRCM
● Non-modal feedrate FB
Axis assignment of the feedrates
Feedrates can be assigned to the axes variably to adjust to the different technological
requirements.
The following variants are possible:
● Separate feedrates for the working plane and the infeed axis
● Variable axis assignment for path feedrate
● Feedrate for positioning axes
Feedrate control
The programmed feedrate can be changed during the machining or for test purposes to enable
adjustment to the changed technological conditions.
● Via the machine control panel
● Via the operator panel front
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
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