Siemens SINUMERIK 840C - 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
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SINUMERIK 840C (IA)