Feedrate Control - Siemens SINUMERIK 840Di sl Function Manual

Examples
5.3 Examples of adaptive control
Note
When system variables are used in the part program, STOPRE must be programmed to
ensure block-synchronous writing. The following is an equivalent notation for polynomial
definition:
FCTDEF(1, 0.2, 0.5, 0.35, 1.5EX-5).
5.3.2

Feedrate control

Example of adaptive control with an analog input voltage
A process quantity (measured via $A_INA[1] ) must be regulated to 2 V through an additive
control factor implemented by a path (or axial) feedrate override. Feedrate override shall be
performed within the range of +100 [mm/min].
Figure 5-2
Determination of coefficients:
y = f(x) = a
a1 = - 100mm / (1min * 1V)
a1 = - 100% regulation constants, pitch
a0 = - (-100) * 2 = 200
a2 = 0 (not a square component)
136
Diagram illustrating adaptive control
+ a x +a x + a x
2 3
0 1 2 3
Function Manual, 11/2006, 6FC5397-5BP10-2BA0
Synchronized actions