Adaptive Control (Additive) - Siemens sinumerik 840d Programming Manual

Motion-Synchronous Action
10
10.4 Actions within synchronized actions
840D
NCU 572
NCU 573

10.4.10 Adaptive control (additive)

Programming example
Additive influence on the programmed feedrate
A programmed feedrate is to be controlled by adding
using the current of the X axis (infeed axis):
The feedrate should only vary by +/– 100 mm/min
and the current fluctuates by +/– 1A around the
working point of 5A.
1. Polynomial definition
Determination of the coefficients
y = f(x) = a
a = –100mm/1 min A
1
a = –(–100)*5 =500
0
a = a
2 3
Upper limit = 100
Lower limit = –100
Therefore:
FCTDEF(1,-100,100,500,-100,0,0)
2. Activate AC control
ID=1 DO SYNFCT(1,$AC_VC,$AA_LOAD[x])
10-368
840Di
2 3
+ a x + a x + a x
0 1 2 3
= 0 (not quadratic or cubic element)
;Read the current axis load (% of the max. drive current ) via $AA_LOAD[x],
calculate the path feedrate override with the polynomial defined above.
F
[ ]
mm/min
Upper limit
100
Lower limit
-100
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
08.97
10
Ι
4 5 6
[ ] A
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