Siemens SINUMERIK 802D sl Function Manual page 334

Rotary Axes (R2)
19.1 General
Units of measurement
The following units of measurement apply as standard to inputs and outputs for rotary axes:
Table 19- 1
Physical quantity
Angular position
Programmed angular speed
MD for angular velocity
MD for angular acceleration
MD for angular jerk limitation
In the case of axis-specific machine data, these units are interpreted by the control as soon
1)
as the axis is declared as a rotary axis.
More detailed information on the subject of dimension units can be found in Chapter
"Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)"
Feedrate
The programmed feedrate F corresponds to an angular speed [degrees/min] for rotary axes
programmed alone in a block.
If rotary axes and linear axes traverse along a common path with G94 or G95, the feed
should be interpreted in the unit of measurement of the linear axes [e.g. mm/min, inch/min].
The tangential velocity of the rotary axis in this case refers to the diameter DE (unit diameter
DE = 360/p mm, with p = circle constant).
If the diameter is the same as the unit diameter (D=DE), the programmed angular speed in
degrees/min and the tangential velocity in mm/min are numerically identical. For the inch unit
setting, "inch" applies instead of "mm".
In general, the following applies for tangential velocity:
F = F
with D
JOG velocity for rotary axes
With SD41130 JOG_ROT_AX_SET_VELO (JOG velocity for rotary axes), a jog velocity that
is valid for all rotary axes can be set.
If a value of 0 is entered in the setting data, then axis-specific MD32020 JOG_VELO
(conventional axis velocity) functions as JOG velocity for the rotary axis.
334
Units of measurement for rotary axes
* D / D
W E
= 360 / π
E
Units
Degrees.
Degrees/min
rev/min
1)
rev/sec
2 1)
rev/sec
3 1)
F = tangential velocity [mm/min]
F = angular speed [degrees/min]
W
D = diameter acted on by F [mm]
D = unit diameter [mm]
E
π = circle constant PI = 3.14...
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Turning, Milling, Nibbling