The Influence Of Resolution On Velocity - Siemens SINUMERIK 840C Installation Instructions Manual

03.95
Valid combinations of position control resolution and input resolution
Position control
Unit
resolution
system
-1 [degr.]
0.5 x 10
mm
0.5 x 10 -2 [mm][degr.]
mm
-3 [mm][degr.]
0.5 x 10
mm
-4 [mm]
2 x 10
mm
-4 [mm][degr.]
0.5 x 10
mm
-5 [degr.]
0.5 x 10
mm
-1 [degr.]
0.5 x 10
inch
-2 [degr.]
0.5 x 10
inch
-3 [inch][degr.]
0.5 x 10
inch
0.5 x 10 -4 [inch][degr.]
inch
-5 [inch]
2 x 10
inch
-5 [inch][degr.]
0.5 x 10
inch
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
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
G95 would be 10 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
SINUMERIK 840C (IA)
Input resolution
mm
-1 -2 -3 -4
10 10 10 10 10
- - -
xy
- - -
xy
- - -
xy
- -
xy xy
- - -
xy
- - - -
xy
- - - -
- - - -
- - -
x
- - -
x
- - -
x
- - -
x
-4
, the lowest programmable velocity is then 10
-4
, the lowest programmable velocity for
6FC5197- AA50
10 Axis and Spindle Installation
10.2.5 Permissible resolution combinations
inch
-5 -1 -2 -3 -4
10 10 10 10
- - - - -
- - - -
x
- - - -
x
- - - - -
- - - - -
- - - -
- - - -
xy
- - - -
xy
- - - -
xy
- - - -
xy
- - - -
xy
- - - - -
-3
-5
10
-
-
-
x
x
-
-
-
-
-
xy
xy
10–9