Siemens SINUMERIK 840C User Manual
Page 1071
12 Functional Descriptions
04.96
12.28.8 Overview of function identifiers and configuring parameters (DB 2, DR 2 ... DR 6)
Axial feed:
Formula for servo trace:
RW=MW*120000*LF/IT [mm/min]
Formula for high-speed data channel:
RW=MW*60000*LF/IT [mm/min]
Example: G91 G94 F1000 Z10 X10
In servo trace:
Read-off
MW=
1885
in Z axis
with
LF =
0.5*10
-4
[mm] in Z axis
and
IT =
16 [ms]
results in
RW =
1885*120000*(0.5*10
-4
)/16 [mm/min]
i.e.
RW =
707 [mm/min]
The same feedrate results in the X axis. Both together have therefore a path feedrate of SQRT
( 707
2
+ 707
2
) = 1000 [mm/min] as programmed.
Note: "Channel/IKA no." is not relevant in the servo trace screen!
Path feedrate:
Formula for servo trace:
RW=MW*60000*EF/IT [mm/min]
Formula for high-speed data channel:
RW=MW*30000*EF/IT [mm/min]
Example: G91 G94 F1000 Z10 X10
In servo trace:
Read-off
MW=
266.5
with
EF =
10
-3
[mm]
and
IT =
16 [ms]
results in
RW =
266.5*60000*(10
-3
)/16 [mm/min]
i.e.
RW =
999 [mm/min]
Distance to go on path:
Formula for servo trace:
RW=MW*EF [mm]
Formula for high-speed data channel:
RW=MW*EF/2 [mm]
IKA input quantity value A:
Important:
The IKA No. selected in the servo trace screen must be larger by 1 than the
desired IKA No (applies for SW 5.1 and 5.2).
If the input quantity is a position, the following applies:
Formula for servo trace
RW=MW*EF [mm]
Formula for high-speed data channel:
RW=MW*EF/2 [mm]
If the input quantity is an R parameter, the following applies:
Formula for servo trace
RW=MW
Formula for high-speed data channel:
RW=MW/2
IKA input quantity value B:
Important:
The IKA No. selected in the servo trace screen must be larger by 1 than the
desired IKA No (applies for SW 5.1 and 5.2).
If the input quantity is a position, the following applies:
Formula for servo trace
RW=MW*EF [mm]
Formula for high-speed data channel:
RW=MW*EF/2 [mm]
If the input quantity is an R parameter, the following applies:
Formula for servo trace
RW=MW
Formula for high-speed data channel:
RW=MW/2
12–296
© Siemens AG 1992 All Rights Reserved 6FC5197- AA50
SINUMERIK 840C (IA)