Control Velocity As A Function Of Normalized Path - Siemens SINUMERIK 840D sl Function Manual

Examples
4.3 Examples of adaptive control
With the values determined above, the polynomial is defined as follows:
FCTDEF(1, -100, 100, 200, -100, 0, 0)
The following synchronized actions can be used to activate the adaptive control function:
for the axis feedrate:
ID = 1 DO SYNFCT (1, $AA_VC[X], $A_INA[1])
or for the path feedrate:
ID = 2 DO SYNFCT(1, $AC_VC, $A_INA[1])
4.3.3

Control velocity as a function of normalized path

Multiplicative adaptation
The normalized path is applied as an input quantity: $AC_PATHN.
0: At block start
1: at block end
Variation quantity $AC_OVR must be controlled as a function of $AC_PATHN according to a
3rd order polynomial. The override must be reduced from 100 to 1% during the motion.
Figure 4-3
Polynomial 2:
Lower limit: 1
Hi limit: 100
a : 100
0
142
a ,
2
a )
3
Regulate velocity continuously
; square component
; cubic component
Function Manual, 08/2018, 6FC5397-5BP40-6BA2
Synchronized actions