Siemens SINUMERIK 840C User Manual
Page 699
03.95
10 Axis and Spindle Installation
10.2.5 Permissible resolution combinations
Valid combinations of position control resolution and input resolution
Unit
system
Position control
resolution
Input resolution
mm
10
-1
10
-2
10
-3
10
-4
10
-5
inch
10
-1
10
-2
10
-3
10
-4
10
-5
mm
0.5 x 10
-1 [degr.]
xy
-
-
-
-
-
-
-
-
-
mm
0.5 x 10
-2 [mm][degr.]
-
xy
-
-
-
-
-
x
-
-
mm
0.5 x 10
-3 [mm][degr.]
-
-
xy
-
-
-
-
-
x
-
mm
2 x 10
-4 [mm]
-
-
xy
xy
-
-
-
-
-
x
mm
0.5 x 10
-4 [mm][degr.]
-
-
-
xy
-
-
-
-
-
x
mm
0.5 x 10
-5 [degr.]
-
-
-
-
xy
-
-
-
-
-
inch
0.5 x 10
-1 [degr.]
-
-
-
-
-
xy
-
-
-
-
inch
0.5 x 10
-2
[degr.]
-
-
-
-
-
-
xy
-
-
-
inch
0.5 x 10
-3 [inch][degr.]
-
x
-
-
-
-
-
xy
-
-
inch
0.5 x 10
-4 [inch][degr.]
-
x
-
-
-
-
-
-
xy
-
inch
2 x 10
-5 [inch]
-
-
x
-
-
-
-
-
xy
xy
inch
0.5 x 10
-5 [inch][degr.]
-
-
x
-
-
-
-
-
-
xy
xy ...
permissible for both linear and rotary axes
x
...
permissible for linear axes only
–
...
linear axes and rotary axes illegal
Caution:
The display resolution must use the same unit system (inches - metric - degrees) as the input
resolution.
10.2.6 The influence of resolution on velocity
The input resolution determines not only the path resolution, but also the lowest programmable
velocity. The lowest programmable velocity is always 10 times greater than the path resolution.
For example, if the input resolution is 10
-4
, the lowest programmable velocity is then 10
-3
mm/min. Depending on the unit system used, the feedrate is interpreted either in mm/min or in
inches/min. If one of the interpolating axes is a rotary axis, the corresponding axial
feedrate is interpreted as degrees/min.
When rotational feedrate G95 is used, the feedrate is interpreted in either mm/revolution,
inches/revolution or degrees/revolution.
When the feedrate is rotational, the lowest programmable velocity is identical to the path
resolution (for instance, for an input resolution of 10
-4
, the lowest programmable velocity for
G95 would be 10
-4
mm/revolution).
The limiting value based on the position control resolution can be taken from the table above.
At no time may the limiting values be exceeded.
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
10–9
SINUMERIK 840C (IA)